~
m
m
2 5 7 5 5 3 20 0 8 1 5 8 22 3 4
ANSI84.1-1967
4 January 1972
ACCEPTANCE NOTICE
The above IndustryStandardization Document wasadopted on 4 January 1972and i s approved
for use by the DOO. The indicated industry groups have furnished the clearances required by existing regulations. Copies of the document are stocked by DoD Single Stock Point, U.S. Naval Publications and Forms Center, Philadelphia, Pennsylvania 19120, for issue to DoD activities only.
Title of Document: Preferred Limits and Fits for Cylindrical
Parts
Date of Specific Issue Adopted: 18 September 1967
- Plus Errata
Releasing Industry Group: The American Society of Mechanical Engineers
Custodians:
Army MU
Navy - SH
Air Force 70
-
-
Military Coordinating Activity:
Air Force 70
Project No. MISC-0596
-
P
No part of this document may be reproduced in any form, in an
electronic retrieval system or otherwise. without the prior
writtun permission of the publisher.
Copyrrghr, Q. 1967, by
THE AMERICAN SOCIETY O F MECHASICAL ENGINEERS
Printed in U.S.A.
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U S A
S T A N D A R D
Preferred Limits and Fits for
Cylindrical Parts
USAS 84.1-1967 (R1974)
Note
For soft conversion of nominal dimensions and limits given
in this standard, 1 inch = 25.4
For explanation of conversion techniques see American
National Standard 2210.1-1 972, Metric Practice Guide.
m
m
.
REAFFIRMED 1994
FOR CURRENT COMMITIEE PERSONNEL
PLEASE SEE M M E MANUAL AS-1 1
SpOndoP
The American Society of Mechonicol Engineers
THE
A M E R I C A NS O C I E T Y
United
Engineering
Center
OF
MECHANICAL
345 East 47th Street
ENGINEERS
N e w Y o r k , N. Y. 10017
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toreword
T
HIS standard represents the latest result of
vork which began
w i t h the organization of Sectional Committee B4 in June 1920 under the namf “Sectional Committee
on the Standardization of PlainLimitGages
forGeneralEngineering
Work. ” Thisoriginalcommitteeproduced
AmericanStandard ASA B4a-1925, “Tolerances, Allowances and Gages for
Metal Fits,” which
w a s u s e d i n varying degree for many years.
In December 1930, SectionalCommittee
B4 wasreorganizedandthenamechangedtothe
presentform,“SectionalCommittee
on t h e StandardizationofAllowancesandTolerancesfor
to a more
Cylindrical Parts and Limit Gages.” The change in name indicated a significant shift
definite and somewhat more restricted mission for the committee.
Duringtheyears
of World War II an ASA War Committeeformed i n 1943 workedon the proje c t but produced no completed results, and t h e activity was turned back to Sectional Committee
the Unification of
B4.AfterthewarthesubjectwasdiscussedattheCanadianConferenceon
Engineering Standards held i n Ottawa in 1945, attended by d e l e g a t e s from Great Britain, Canada,
York later in t h e same year.
and the United States, and again at another joint meeting in New
Thesemeetingsaresignificantbecausesince1945
work i n thisprojecthasbeenstronglyinfluenced by theseandsimilarABCconferences.Properevaluationofthepresentstandard
will depend upon an appreciation
of the important effects of progress towards agreement on unification of standards between the ABC countries.
of theactivitiesimmediatelyfollowing
World War II wasAmericanStandard
Theresult
I), ASA B4.1-1947.” In the preface to
“ L i m i t s a n d F i t s for Engineeriw and Manufacturing (Part
that document i t was stated that the ABC meetings resulted in agreement on five baslc principles,
and since the first four
of these principles, w i t h certain minor and obvious variations, apply to
m u s t be a
t h i s p r e s e n t s t a n d a r d , i t is considered worth w h i l e torepeat them here. First, there
commonlanguage(definitions)throughwhichanalyses
may berecordedandconveyed.Second,
i n reducingthenumber
of differentdiameterscommonly
a table of preferred basic sizes helps
used in agivensizerange.Third,preferredtolerancesandallowancesarealogicalcompleaid the designer i n se!ectingstandardtolerances.Fourth,
menttopreferredsizesandshould
uniformity of method of applying tolerances is e s s e n t i a l .
i n N e w York i n June 1952 and February 1953. DelegaAdditional ABC conferences were held
tions fromSectionalcommittee
B4 were active in these conferences, which resulted in a draft
proposalforanABCsystem
of Limits and Fits, published as
ASA B4/30.TheSectionalCommittee B4 d e l e g a t e s to these conferences voted to recommend approval of the ABC proposals as
t h e b a s i s for an American standard
i f and when such a standard were developed.
of thisstandardthere
h a s beenadditionaldiscussionsatABCconSincethepublication
1960 and at Arden House,
New York, in September 1962. There
ferences held i n Ottawa in June
hasbeen a n expansion o f definitionsunder ASA 8 1 . 7 , andtheyarereflectedintherevision.
The revisedproposalwassubmittedtothesponsororganizationandtothe
USA Standards
Institute (formerly American Standards Association) for final approval as a
USA Standard. This
approval was granted on August 3. 1966.
This revision, however, was never published as it was noted that other rhanges, agreed
CO
a t the Arden House ABC Conference, had not been incorporated
i n the standard.
A newrevisionwasissued,andfollowingapproval
by the USA StandardsCommitteeB4,
it
was approved by the sponsor and on September 18, 1967 by the USA Standards Institute.
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
T h i s USA Standardisone
of nearly 3000 standardsapprovedasAmerican
standards by the American Standards Asscciation.
On August 24, 1966, t h e ASA
of America standards Institute. Standards
was reconstituted as the United States
USA Standards. There is no
approved a s American Standards are now designated
change in their.index identification or technical content.
UDC 621.753.1.3
...
111
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USA STANDARD
ASME B'4.3 67
m
07596700573635722
m
USA StandardsCommittee
B4, Standardizationof
AllowancesandTolerancesforCylindricalPartsandLimitGages
OFFICERS
G. H. Stimson, Chairman
COMMITTEE MEMBERS
AMERICAN SOCIETY FOR QUALITY CONTROL
R. J . Morris, International Harvester Co., Chicago, I11
AMERICAN SOCIETY OF MECHANICAL ENGINEERS, THE
Z. R. Bliss, Brown University, Providence, R.I.
R: T. Woythal, Kearney & Trecker Corp., Milwaukee, Wisconsin
AMERICAN SOCIETY OF TOOL ANDMANUFACTURING ENGINEERS
G. H. Stimson, Greenfield Tap and Die, Division of United-Greenfield Corp., Greenfield, Mass.
ANTI-FRICTION BEARING MANUFACTURERS ASSOCIATION, INC.
H. L. Potter, The Fafnir Bearing Co., N e w Britain, Com.
BUSINESS EQUIPMENT MANUFACTURERS ASSOCIATION
A. E. Mall, Interhational Business Machines Corp., Endicott,
N. Y.
METAL CUTTING TOOL INSTITUTE
A. F. Miller, Jr., Wells Tool Co., Greenfield, Mass.
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
F. V. Kupchak, Westinghouse Electric Corp., Pittsburgh, Pa.
L. D. Price, Alternate, National Electrical Mfgrs. Association, New York, N. Y.
NATIONALMACHINE TOOL BUILDERS' ASSOCIATION
F. S. Blackall, III, The Taft-Peirce Mfg. Co., Woonsocket, R. I.
SOCIETY O F AUTOMOTIVE ENGINEERS, INC.
R. F. Holmes, General Motors Technical Center, Warren, Michigan
SPORTING ARMS 8z AMMUNITIONS MANUFACTURERS ASSOCIATION
J . F. Walsh, Olin Mathieson Chemical Co., New Haven, Conn.
U. S. DEPT. OF THE ARMY
C.B. Keane, Frankford Arsenal, Philadelphia, Pa.
U. S. DEPT. OF COMMERCE
I. H. Fullmer, National Bureau of Standards, Washington, D. C.
U. S. DEPT. OF THE NAVY
Code 609.3C, Bureau of Ships, Navy Dept., Washington, D. C.
J, C. Reid, Alternate, Bureau of Ships, Navy Dept., Washington, D.C.
U. S. MACHINE, CAP, WOODAND TAPPING SCREW BUREAUS
H. G. hluenchinger, Holo-Krome Screw Corp., Hartford, Com.
INDIVIDUALMEMBERS
W. S. Brown, Roanoke, Virginia
H. W. Fahrlander, Sr., St. Pet.ersburg, Fla.
W. H. Gourlie, West Hartford, Conn.
R. E. W. Harrison, Harrison Engineering Services, Inc., Washington,
Ronald Jones, Westinghouse Electric Corp., Philadelphia, Pa.
A. O. Schmidt, The Pennsylvania State University, University Park,
L. F. Spector, Hitchcock Publishing Co.,Wheaton, Ill.
H. D. Stover, Timken Roller Bearing Co., Canton, Ohio
D. c.
Pa.
iv
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ASME B4.L
6 7 D 0 7 5 7 b 7 0 057LbLb 6 6 9 D
USA Standard
PreferredLimits
and Fits forCylindricalParts
1. Scope and Application.
of magnitude,
2.3 Size. Size i s adesignation
When a value is a s s i g n e d to a dimension it is referred to hereinafter a s t h e s i z e of that dimension.
1.1 T h i s s t a n d a r d p r e s e n t s d e f i n i t i o n s
of terms
plain
(non-threaded)
applying to fits between
cylindrical parts and makes recommendations on
fits
preferred sizes, allowances, tolerances, and
for u s e wherever they are applicable. The standard through 20 in. diameter i s in accord with the
recommendations of American-British-Canadian
Conferences. Experimental work
i s being carried
on and when results are available, agreement in
20 in.willbesought.Itrepretherangeabove
sentsthecombinedthinkingandexperience
of
groups who have been interested in standards in
it shouldhaveapplicationfora
thisfield,and
of products.Therecommendations,
widerange
therefore, are presented for guidance and for use
wheretheymightservetoimproveandsimplify
products, practices, and facilities.
Many factors,such a s length of engagement,
bearing
load,
speed,
lubrication,
temperature,
humidity, surface texture,andmaterials,must
betakenintoconsiderationintheselection
of
fits for a particular application, and modifications
to
intheserecommendationsmightberequired
satisfyextremeconditions.Subsequentadjusta s the result of exments might also be desired
periencein a particularapplication to suitcritical functional requirements or to permit optimum
manufacturingeconomy.Selection
of departure
from theserecommendationswilldependupon
consideration of theengineeringandeconomic
factors that might be involved.
NOTE: It is r e c o g n i z e d that thewords“dimension”
to c o n v e y t h e meanand “size” are both used at times
i n g of magnitude.
2.4 Nominal Size. Thenominalsize
is thedeof general
signation which is used for the purpose
identification.
2.5Basic
Size. T h eb a s i cs i z ei st h ast i z e
from which the limits of s i z e a r e d e r i v e d by the
application of allowances and tolerances.
2.6Reference
Size. A r e f e r e n c e s i z e i s
a size
without tolerance used only for information puror inspecposes and does not govern machining
tion operations.
2.7Design
Size. T h ed e s i g ns i z ei st h eb a s i c
size
with
allowance
applied,
from which
the
limitsof size arederived by theapplicationof
tolerances. If t h e r ei sn oa l l o w a n c et h ed e s i g n
size is the same as the basic size.
2.8 ActualSize.
An a c t u a ls i z ei s
a measured
size.
2.9 Limits of Size. T h el i m i t s
applicable maximum
and
minimum
2.14, Tolerance Limit)
of s i z ea r et h e
sizes. (See
2.10 MaximumMaterialLimit.
A maximum mais thatlimit
of sizethatprovides
teriallimit
t h e maximum amount of material for the part. Normally i t i s t h e maximum limit of s i z e of an external dimension or the minimum limit of s i z e of an
internal dimension.
2. Definitions
2.11 Minimum MaterialLimit.
A minimum material limit is that limit of size that provides the
minimum amount of material for the part. Normall y i t is the minimum limit of s i z e of an external
dimension or the maximum limit of size of an internal dimension.
2.1Termsrelating
to t h es i z ea n df i t
of p a r t s
to mechanical
whicharegenerallyapplicable
parts, are defined a s follows:
2.2 Dimension.Adimension
i s a geometrical
c h a r a c t e r i s t i c s u c h a s diameter, length, angle, or
centerdistance.Theterm“dimension”isalso
to i n d i c a t et h es i z e
or
usedforconvenience
numerical value of a dimension as specified o n
the drawing.
NOTE: Anexample
of e x c e p t i o n s :a ne x t e r i o rc o r n e r
r a d i u sw h e r e the m a x i m u m r a d i w i s the minimummateriallimitand
the minimumradius
is the maximum
material limit.
1
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ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
USA STANDARD
NOTE: Theplural
term "tolerances" i s sometimes
usedtodenotethepermissiblevariations
from the
i s exspecified or designsize, when thetolerance
pressedbilaterally. In this sense the term i s identical to "Tolçrance limit."
2.14 Tolerance Limit. A tolerancelimit is the
variation, positive or negative, by which a size
i s permitted to depart from the design size. (See
2.9, Limits of Size)
2.15 UnilateralTolerance.
A unilateraltolerance i s atolerancein
which variation is permitted only in one direction from the design size.
2.16 BilateralTolerance. A bilateraltolerance
is a tolerance in which variation i s permitted in
both directions from the design size.
2.17 Fit. Fit i s the general term used to signify
therange of tightness or looseness which may
result from the application of a specific combination of allowances and tolerances in the design
of mating parts.
2.18 Actual Fit.Theactualfit
between two
mating parts i s therelationexisting
between
them with respect to the amount of clearance or
interferencethat i s present when theyare assembled.
2.24 Basic Hole System. A basicholesystem
is asystem of fits inwhich the design size of
the hole i s rhe basic size and the allowance, if
any, i s applied to the shaft.
2.25 Basic Shaft System. A basicshaftsystem
i s asystem of fits inwhich thedesign size of
the shaft i s the basicsize and theallowance,
if any, i s applied to the hole.
3. Preferred Basic Sizes
In specifying fits, the basicsize of mating
parts shall be chosen from the following tables
(one for fractionalandone
for decimal sizes)
whenever possible. All dimensions are given in
inches.
TABLE 1
Preferred Basic Sizes
Fractional
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
NOTE: Fits are of threegeneraltypes:clearance,
transition, and interference.
2.19 Clearance
Fit.
A clearance
fit
i s one
having limits of size so prescribed that a clearancealwaysresults
when mating partsareassembled.
2.20 Interference Fit. An interference fit i s one
having .limits of size so prescribed that an interferencealwaysresults
when mating parts are
assembled.
'
1/64
1/32
1/16
3/32
1/8
5/3 2
3/16
1/4
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
7/8
2.21 Transition
Fit.
A transition fit i s one
havinglimits of size so prescribedthateither
aclearance or an interference may result when
mating parts ace assembled.
1
1:/4
1 1/2
1 3/4
2
2 1/4
2 1/2
2 3/4
2.22 Unilateral
Tolerance
System.
A design
plan which uses only unilateral tolerances i s
known a s a unilateral tolerance system.
3
3 1/4
3 1/2
3 3/4
2.23 BilateralTolerance System. A design plan
which uses only bilateral tolerances i s known a s
a bilateral tolerance system.
4
4 1/4
4 1/2
4 3/4
0.015625
0.03125
0.0625
0.09375
0.1250
O. 15625
0.1875
0.2500
0.3125
0.3750
0.4375
0.5000
0.5625
0.6250
0.6875
0.7500
0.8750
1.0000
1.2500
1.5000
1.7500
2.0000
2.2500
2.5000
2.7500
3.0000
3.2500
3.5000
3.7500
4.0000
4.2500
4.5000
4.7500
5
5 1/4
5 1/2
5 3/(4
6
6 1/2
7
7 1/2
8
8 1/2
4
9.112
10
10 1/2
11
11 1/2
12
12 1/2
13
13 1/2
14
14 1/2
15
15 1/2
16
16 1/2
17
17 1/2
18
18 1/2
19
17 1/2
20
5.0000
5.2500
5.5000
5.7500
6.0000
6.5000
7.0000
7.5000
8.0000
8.5000
9.0000
9.5000
10.0000
10.5000
11.0000
11.5000
12.0000
12.5000
13.0000
13.5000
14.0000
14.5000
15.0000
15.5000
16.0000
16.5000
17.0000
17.5000
18.0000
18.5000
19.0000
17.5000
20.0000
2
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2.12 Allowance, An allowance is aprescribed
difference between the maximum-material-limits
of mating parts. It is the minimum clearance (positive allowance) or maximum interference (negative allowance) between such parts.(See 2.17 Fit.)
2.13 Tolerance. A tolerance i s the total permissible variation of asize.Thetolerance
i s the
difference between the limits of size.
P R E F E R R E D LIMITS AND.FITS
5 . AcceptanceofParts
TABLE 2
Preferred Basic Sizes
5.1 Acceptability. A part shall be dimensionally
a c c e p t a b l e if i t s a c t u a l size d o e s n o t e x c e e d t h e
limits of sizespecifiedinnumericalvalueson
the drawing or in writing. It does not meet dimensionalspecification
if its a c t u a ls i z ee x c e e d s
those limits.
Decimal
2.00
2.20
2.40
2.60
0.010
0.012
0.0 16
0.020
0.025
0.032
0.040
0.05
0.06
8.50
9.00
9.50
10.00
10.50
11.o0
11.50
12.00
12.50
13.o0
13.50
14.00
14.50
15.00
15.50
16.00
16.50
17.00
17.50
18.00
18.50
19.00
19.50
20.00
2.80
3.00
3.20
3.40
3.60
0.08
3.80
0.10
0.12
0.16
0.20
0.24
0.30
0.40
0.50
0.60
0.80
1.o0
1.20
1.40
1.60
1.80
4.00
4.20
4.40
4.60
4.80
5.00
5.20
5.40
5.60
5.80
6.00
6.50
7.00
7.50
5.2 ReferenceTemperature.
Limits of s i z ea s
derived from the tolerances shown herein are the
extremevalues,withinwhichtheactualsize
of
the dimension shall lie, at the standard temperature of 20C or 68F.
For Length deviations per inch
(or per centi68F, andfor
meter)fortemperaturesotherthan
of thermalexpansion,refvariouscoefficients
erenceshouldbemadetothetablesinAppendix II.
5.3 Limitsandtolerancesareconsidered
to be
of decimal
a b s o l u t er e g a r d l e s s
of thenumber
as
places. Limits and tolerances are to be used
if they were continued with zeros beyond the last
significant figure.
8.00
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
4. Preferred Seriesfor Tolerances and Allowances.
NOTE: T h i s m e a n s t h a t all i n a c c u r a c i e s of s i z e , d u e
Allfundamentaltolerancesandallowances
of
to errors,wear, or changein tools, gages,machines,
a l ls h a f t sa n dh o l e sh a v eb e e nt a k e n
from the
wichin
p r o c e s s e s o r measurement, shall beincluded
series given in the following table. All dimensions t h e s e l i m i t s .
are given in thousandths of an inch.
5 . 4 E f f e c t of Surface Texture. Parts of n e c e s s i t y
aremeasuredoverthecrests
of surfaceirregularities, yet for moving parts such irregularities
For
SoOn wear off and clearances are increased.
t h i s r e a s o n s u r f a c e f i n i s h is quite critical, espebe speciallyforthefinergrades,andshould
For further
cifiedwhenconsiderednecessary.
to USA Standard
d e t a iol nt h is u b j e crte f e r
Surface Texture, USAS B46.1.
TABLE 3
o. 1
...
0.15
...
...
0.2
...
0.25
...
0.3
...
0.4
...
0.5
0.6
0.7
0.8
0.9
1
1.2125
1.4
1.6
1.8
2
2.2
2.5
2.8
3
3.5
4
4.5
5
6
7
10
100
12
14
16
160
18
20
200
22
25
250
...
...
...
28
...
30
35
._.
...
40
45
50
60
8
70
80
9
...
6. StandardTolerances
T h es e r i e s
of standardtolerancesshownin
T a b l e 4 a r e so arrangedthatforanyonegrade
theyrepresentapproximatelysimilarproduction
considerationsthroughouttherange
of s i z e s .
T h e t a b l e p r o v i d e s a suitablerange from which
appropriatetolerancesforholesandshaftscan
of standard
b es e l e c t e d .T h i se n a b l e st h eu s e
gages.Thesetoleranceshavebeenusedinarr a n g i n g t h e f i t s g i v e n i n T a b l e s 5 to 9 .
...
...
...
...
...
...
...
3
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USA STANDARD
TABLE 4
Tolerance values are in thousandths of an inch. Data in bold face are in accordance with ABC agreements.
7
Nominal
Size Range
Inches
Over
To
o
--
0.12
0.24
- 0.40
0.71
1.19
1.97
3.15
4.73
- 7.09
9.85
12.41
- 15.75
19.69
19.69
30.09
30.09
41.49
56.19
41.49
76.39
56.19
76.39 -100.9
100.9-131.9
131.9-171.9
171.9 -200
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
0.12
0.24
0.40
0.71
1.19
1.97
3.15
4.73
7.09
9.85
12.41
15.75
-
-
Grade
Grade
Grade
4
5
6
0.12
0.1s
0.15
0.2
0.25
0.3
0.3
O. 4
0.5
0.6
0.6
0.7
0.8
0.9
1“O
1.2
1 .6
2 .o
2.5
3
4
0.15
0.20
0.2s
0.3
0.4
0.4
0.s
0.6
0.7
0.8
0.9
1.o
1.0
1.2
1.6
2.0
2.5
Grade
Grade
8
9
Grade
10
Grade
11
0.4
0.5
0.6
0.7
0.8
1.o
1.2
1.4
1.6
1.S
2.0
2.2
2.5
0.6
0.7
0.9
1.o
1.2
1.6
1.8
2.2
2.5
2.8
3.0
3.5
4
5
6
8
10
12
16
20
25
1.0
1.2
1.4
1.6
2.0
2.5
3.0
3.5
4.0
4.5
5.0
6
6
8
10
12
16
20
25
30
40
1.6
1.8
2.2
2.8
3.5
4.0
4.5
S
6
7
8
9
10
12
16
20
25
30
40
50
60
2.5
3.0
3.4
4 .O
5.0
6
7
9
10
12
12
14
16
20
25
30
40
50
60
80
1O0
0.25
0.3
0.4
0.4
0.5
0.6
0.7
0.9
1.o
1.2
1.2
1.4
1.6
2.0
2.5
3
3
4
5
4
6
5
8
10
6
Grade
7
3
4
5
6
8
10
12
16
Grade
12
Grade
13
4
5
6
7
8
10
12
14
16
18
20
22
2s
30
40
50
60
80
100
125
160
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
7. Selection of F i t s
been extended to include a wider range of s i z e s .
Standard
fits
are
represented
graphically
by
Figures 1 to S.
In s e l e c t i n g l i m i t s of s i z e foranyapplication,
the type of fit is determined first, based on
the
8.2 Designation of StandardFits.Standardfits
aredesignated by means of thesymbolsgiven
below to facilitate reference to classes
of fit for
educationalpurposes.Thesesymbolsarenot
intended to be shown on manufacturing drawings;
instead,sizesshouldbespecified
ondrawings.
The letter symbols used are a s follows:
RC Running or Sliding Clearance Fit
L C L o c a t i o n a l C l e a r a n c e Fit
L T T r a n s i t i o n C l e a r a n c e or Interference Fit
LN Locational Interference Fit
FN Force or Shrink Fit
These letter ‘symbols are used in conjunction
with numbers representing the class
of fit; thus
“ F N 4” r e p r e s e n t s a c l a s s 4, force fit.
Each of these symbols (two letters and a number) represents a complete fit, for which the minimum and maximum clearance or interference, and
the limits of s i z e for the mating parts, are given
directly in the tables.
u s e or service required from the equipment being
designed;thenthelimits
of s i z e of themating
parts are established, to assure that the desired
fit will be produced.
Theoretically an infinite number
of fits could
be chosen, but the small number of standard fits
shownhereinshouldcovermostapplications.
8. Standard Fits
8.1 T a b l e s S to 9 havebeendevelopedtogive
a s e r i e s of standard types and classes
of fit on
a unilateral hole basis, such that the fit produced
by matingparts i n anyoneclasswillproduce
approximatelysimilarconditionsthroughoutthe
range of s i z e s . T h e s e t a b l e s p r e s c r i b e the fit for
any given size, or type of fit; they also prescribe
thestandard limits for thematingpartswhich
will produce the fit.
In developing Tables 5 to 9 i t has been recognized that any fit will usually be required to perby the
form one of .three functions, as indicated
three general typesof fits: running fits, locational
fits, and force fits.
S to 9 containall
The fits l i s t e di nT a b l e s
ABC proposalbuthave
thoseintheapproved
8.3 Description of Fits.
8.3.1 Running and SIiding Fits. Runningand
of clearanceare
sliding fits, forwhichlimits
a simgiven in Table 5 , are intended to provide
4
COPYRIGHT 2003; American Society of Mechanical Engineers
6
7
9
10
12
16
18
22
2s
28
30
35
40
50
60
80
100
125
160
200
250
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
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Policy Group at 1-800-451-1584.
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--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
P R E F E R R E D LIMITS AND F I T S
ilarrunningperformance,withsuitablelubricationallowance,throughouttherange
of s i z e s .
T h ec l e a r a n c e sf o rt h ef i r s tt w oc l a s s e s ,u s e d
chiefly a s slidefits,increasemoreslowlywith
so that accurate
diameter than the other classes,
locationismaintainedevenattheexpenseof
free relative motion.
.-
8
6
4
2
O
-2
T h e s e f i t s may be described briefly a s follows:
g
5
-4
i 1;
R C 1 C h s e slidingfits areintendedfortheaccuratelocation of partswhichmust
assemperceptible
without
play.
ble
-
m
-12 H O L E S
-16.
- 18 --14.
6
4
2
-20 -
- 22
! o
~
~
SHAFTS
"_
-~
~~~
-2
3-4
FIG.2 GRAPHICAL REPRESENTATION O F STANDARD
LOCATIONAL CLEARANCE FITS (SHOWN IN
TABLE 6)
-6
-8
-10
'
8.3.2 Locational Fits. L o c a t i o n a l f i t s a r e f i t s
intended to determineonlythelocation
of the
or a c c u r a t e
mating parts; they may provide rigid
or provide
location, a s withinterferencefits,
R C 2 Sliding fits are intended for accurate locagreater maximumclearancesomefreedomoflocation,
a s withclearancefits.
tionbutwith
this
fit
Accordingly
they
are
divided
into
three
groups:
than ,-lass RC 1. parts made
and turn easilybutarenotintendedClearancefits,transitionfits,andinterference
fitstorunfreely,andinthelargersizes
may
T h e s ea r e
morefullydescribed
a s follows:
seize
with
small
temperature
changes.
L C Locationalclearance
fits areintendedfor
R C 3 Precision running fits a r e a b o u t t h e c l o s e s t
partswhicharenormallystationary,but
to runfreely,
f i t sw h i c hc a nb ee x p e c t e d
which can be freely assembled or d i s a s s e m and are htended for precision work at slow
bled. They run
from snug fits for parts respeeds and light journal pressures, but are
of location,throughthe
quiring
accuracy
not suitable where appreciable temperature
fits for p a r t ss u c h
as
mediumclearance
CO be
encountered
differencesarelikely
ball,raceandhousing,
to t h e looser fasR C 4 C l o s e running fits areintendedchieflyfor
tenerfitswherefreedom
of a s s e m b l y i s of
runningfitsonaccuratemachinerywith
primeimportance.
moderatesurfacespeedsandjournalpressures, where accurate location and minimum
LT Locationaltransitionfits a r e a compromise
between clearance and interference fits, for
play is desired.
of location is
applicationwhereaccuracy
important,buteither
a smallamount
of
R C 5 Medium running fits are intended for higher
c l e a r a n c e or interference is permissible.
running speeds, or heavy jaurnal pressures,
R C 6 or both.
F'G.
GRRUAN~~EA~RR5E~~:NSCENCfAETAIROANNOCFE
IN TABLE 5)
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
t
R C 7 Free running /its are intended for use where
or wherelarge
a c c u r a c yi sn o te s s e n t i a l ,
to beentemperaturevariationsarelikely
countered, or under both of these conditions.
2
: !
Y
a
O
- 1
-2
R C 8 ) L o o s e running fits are intended for use
(wherewidecommercialtolerancesmaybe
necessary,togetherwithanallowance,on
RC
member.external
the
.
SCLLE
FOR Ai THOUSANDTHS
DIAMETER OF OF
ONEANINCH
W H
FIG. 3 GRAPHICAL REPRESENTATION OF STANDARD
LOCATIONAL TRANSITION FITS (SHOWN IN
TABLE 7 )
5
COPYRIGHT 2003; American Society of Mechanical Engineers
"_
Continued on page 12
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
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ASME B4.L
67 W 0759b70 057162L T2b
m
USA STANDARD
TABLE 5 RUNNING AND SLIDING FITS
Limits are in thousandths of an inch.
Limits for hole and shaft are applied algebraically to the basic size to obtain the limits of size for the parts.
Data in bold face are in accordance with ABC agreements.
Symbols H5, g5, etc., are Hole and Shaft designations used in ABC System (Appendix 1).
Nominal
Size Range
Inches
Over
To
o
-0.12
a 12 - 0.24
0.71
- 0.40
- 0.71
- 1.19
1.19
- 1.97
1.97
- 3.15
3.15
- 4.73
4.73
- 7.09
7.09
- 9.85
0.24
0.40
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
9.85-12.41
3.0 + 2.2
12.41-15.75
O
6-6
4.0
15.75 -19.69
'
C
2.5
- 3.0
- 4.4
- 4.0
~~
2.5
8.2
2.8
+ 3.5 ~-2.5
O
+ 4.0
- 4.7
-
2.8
19.69-30.09
30.09 -41.49
56.19 -76.39
76.39-100.9
100.9
-13 1.9
131.9
-171.9
171.9
-200
+ 2.0
o
5.7
3.0 + 2.5
O
7.1
4.0 + 3.0
O
9.0
5.0 t 4.0
O
11.5
6.0 + 5.0
2.5
14.0
8.0
18.0
O
+
6.0
O
- 2.5
- 3.7
- 3.0
- 4.6
-- 64.0.0
- 5.0
- 7.5
- 6.0
- 9.0
- 8.0
-12.0
2.5
7.5
3.0
9.5
+ 3.0
4.0
+ 5.0
12.0
5.0
15.0
6.0
19.0
8.0
22.0
- 2.5
+
6.0
O
+
- 4.5
- 3.0
- 5.5
- 4.0
- 7.0
- 5.0
- 9.0
8.0
- 6.0
o
+ 4.0
O
O
O
+10.0
O
8.0
!6.0
0.0
+ 5.0
O
+
6.0
- 8.0
-11.0
-10.0
- 8.0
8.0 +-6.O
O
-13.0
21.01
10.0 I +10.0-10.0
O
-26.0
-11.0
- 8.0
-12.0
Continued on page 7
6
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
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--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
41.49 -56.19
PREFERRED LIMITS AND FITS
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
T A B L E 5 RUNNING AND SLIDING
FITS (continued from p a g e 6 )
Limits are in thousandths
<
of an inch.
L i m i t s for hole and shaft are applied algebraically to the basic size
to o b t a i n t h e l i m i t s of s i z e for t h e p a r t s
Data in bold face are in accordance with ABC agreements
Symbols Hg, e7, etc., are Hole and Shaft designations used in ABC System (Appendix
C l a s s RC 5
6
C lRa C
ss
7
C lRa C
ss
Class RC 9
8
C lRa C
ss
'm
I
4.0
7.0
-
tt
+
3do
I
-
-
--
+ 3.5 -
-
6.0
8.2
6.0
17.5
+ 6.0 - 6.0
0
-
7.5
2.0
3 .0
2.5
3.7
3.0
4.6
4.0
13.5
5.8
5.0
7.2
6.0
8.5
18.0
10.0
19.5
+
-
-
o 4.5 O - 79.:
5.0
O
6.0
O
1
-
8.0
11.0
10.0
13.5
I
I
2.8
O
3.5
O
4.0
O
4.5
O
7 . 0 + 5.0
15.5
O
8 . 0 + 6.0
3.5+
7.9
4.5 +
10.0
5.0 +
11.5
6.0 +
40.0
-
-
3.5
5.1
4.3
6.3
5.0
7.5
6.a
9.a
7.d
10.5
8.0
12.0
-33.0
1
-30.0
-40.0
-35.0
"47.0
45.0 +40.0 -45.0
o -70.0
11O.O
80.0 +40.0
145.0
O
O
-
-
5.0
16.7
6.0
12.87.0
15.5
~~
2.51-
-
-
4.0
o
+ 4.0 + 5.0 -
+
3.5
O
+
+
-
5.0
l2O0 -
1-19
0.711.191.97
15.:
12.0
18.0
15*0
22.0
18.0
26.0
12.0
O
-
+
20.0
+
25.0
+
30.0
- 30.0
- 42.0
- 40.0
- 30.0956.0
41.49
- 50.0
- 70.0
-
0.24
0.400.71
8.8
7.0
10.5
-3.15
1.9713.5
- 10.
o -
O
'0
10.0
0.12
0.240.40
6io1 l!)i
7.0 - 9.0
O
-
0.12-
1- 1/I l.:
t:!
3.154.73
4. 73-
7-09
7.09-
9.85
9.85-
12.41
14.C
20.C
16.C
22.C
-- 20.c
28.C
- 25.C
-
~
1:
9.0
Over
To
H 1 1 IShaft
Hole
I
20.5
10.0 +
24.0
12.0 +
28.0
15. +
34.:
- 12.0 18.0 +
- 17.E 38.0
l
25.0 t16.0
O - 35.C
51.0
- 30.C
30.0+20.0
62.0
O
42.C
40.6 +25.0 - 40.C
O
- 56.C
81.0
50.0+30.0
- 50.C
100
O - 70.C
60.0 +40.0 - 60.C
125
O - 85.c
80.0 +50.0 - 8O.c
1160
o -110
- 80.0 100 +60.0-100
-105.0
200
o 1-140
-
"25.0
1-25.0 -45.0
-61.0
O
o
10.0 + 7.0
21.5
O
12.0 + 8.0
25.0 l
O
14.0 + 9.0
29.0
O
16.0+10.0
32.0
O
20.0+12.0
:15.:1 1-
-26.0
1
-
26.0
25.0
+12.0
- 25.0
33.0
30.0 +16.0
30.0
- 40.0
- 40.0
40.0+20.0
72.0
- 52.0
50.0 +25 O - -50.0
91.01
d - 66.0
- 60.0
60.0
+30.0
~
45.0
86.0
1.6
O
2.0
O
2.5
O
3.0
O
3.5
O
4.0
1
I
-
t
67.0
I
8.0
-10.5
-10.0
.O
-13
-12.0
I -16.0
__
-16.0
-21.0
-20.0
22.0
I
Nominal
Size Range
Inches
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
-
tt
1
I
I
1 . 2 1.2 + 1 . 6 - 1.2
2.0 +
1.9 3.8 - O - 2 . 2
4.6
1.6 1.6 + 2.0 - 1.6
2.5 +
- 2.4 4.8 - O - 2.8
5.7
- 2.0 2.0 + 2.5 - 2 . 0 3 . 0 +
- 3 . 0 6.1 O
3.6
7.1
2.5 2.5 + 3 . 0 - 2 . 5
4.0 +
- 84 . 83
-3.7
7.3 - 0
- 3.0 3 . 0 + 3.5 - 3.0 5.0 +
- 4.4 8.7 - O
5.2 10.7
- 3.53.5
+ 4 . 0 - 3.56.0
+
- 5.1
10.0
o
6.0
12.5
- 4.4.
+ 4 .45.. +
I - 11.;
5.;
O - 6.; l i . !
5.0
5.0 + 5.0
5.0
8.0 +
7.0 13.n
8.0 1 16.0 I
-,.- n-
t1;:
6.0
1
i!I+
J-
I
I).
30.0
62.0
40.0
81.0
50.0
L O0
O0
!O0
O
O
O
19.69- 30.07
4 1.49- 56.19
-100
100.9
-131.9
I + 60.0
1-140 I
O
131.9-171.9
I I
E n d of Table 5
7
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
USA STANDARD
TABLE 6 LOCATIONAL CLEARANCE FITS
Limits are i n thousandths of an inch.
Limits for hole and shaft are applied algebraically to the basic size to obtain the limits of size for the parts.
Data in bold face are in accordance with ABC agreements.
Symbols H6, h5, etc., are Hole and Shaft designations used in ABC System (Appendix I).
~~
Class
LC
Nominal
Size Range
Inches
2
I
Class LC 5
Class LC 4
Class LC 3
Standard
Standard
Limits
%$
Over
0
-
+
O
0.12
-
0.45
I
12-41-.
15-75-
12'41
1.3
O
+0.4
+ O
-
-0.2
-0.25
O
+0.4
-
O
+0.5
0
-
-
O
+0.8
-
-
0.4
+
O
- 0.5
O
+ 0.6
- 0
O + 0.7 + o
1.2 - o 0.5
o + 0.9 t o
O
1
o
+0.9
+ O
1.5
- O
-0.62.3
O
+1.0
+ O
1.7
O
2.0
I
- O
2.1
O
2.4
19-69
O
2.6
I
-0.7
2.6
+1.2
+ O
- O
-0.83.0
I o I-
15-75
+1.2
O
+1.4
-
0
+1.6
- O
+ o
1-0.9
+
O
-1.0
+ O
-1.0
O
+1.4
O
+1.6
- O
I
+1.8
-O
I
O
IoI
+2.0
3.2 - O
O
+ O
- 0.9
- O
+2.2
3.6
0
-
O +2.5
4.1 - O
I
+
O
+
O
- 1.0
- 1.2
I-+
+
+
o
1.2
O
1.4
O
- 1.6
o
3.6
O
4.1
O
I+
0.K
0.751
0
+ 0.4 1 - 0.1
- O
I
-
O
+
5
O
16.0
+ 8.0 +
-0
+10.0
-O
O
-5.0
+ O
-6.0
O
20
36
O
+12
-
0
+16
-
O
+
-
+
O
8
O
-10
- 0.4
- 1.1
- 0.5
2.8 t
O
3.0
-
- 1.4
- 0.6
- 1.6
-
0.6
1.8
0.7
- 1.9
- 0.7
- 2.1
- 0.8
- 2.4
o
1.8
+ o
- 2.0
O
- o - 2.2
- 0
7o +
5.7
o
6.5
3.5 +
+ 4
- O
+ S
- 0
+ o
- 2.5
+
- 3
O
I
I
-
O +12.0
20 - 0
1
+
I
I
O
"8
0.9
+
3.0
5 . 9 - 0
+ 6
- o
+ E
-
o
+12
-
+20
-
o
32
O
41
O
- 7.6
1.8
- 9.8
- 1.8
O
+25
-
1.4
- 6.4
- 1.6.
-o
+16
-O
-
2.9
- 4.2
- 1.2
- 5.2
-O
+10
-
0.9
- 1.0
- 3.5
- 1.2
o
20
O
26
O
13 .O
+
I- 0.35
- 0.15
- 0.45
- 0.2
- 0.6
- 0.25
- 0.65
- 0.3
- 0.8
- 0.4
- 1.0
+ 2.2 t o
- O 1.4
+ 2.5 + o
- 'O - 1.6
4.6
8
O
10
O
13
56.19
- 171.9
- *Oo
6
- O -
o +
16
l3l.9
O +16
0.6
1.0 t o
0.7
1.7 - O o + 1.2 t o
- 0.8
2
- 0
O + 1.6 t o
1
2.6 - O -__
O + 1.8 t o
3
- 0
- 1.2
1.5
o
4 1.49-
2.61-
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
4'73
7*09
9*85"
-0.4
+o
0.9
9*85
+ O
O
+0.3
O
7.09-
1.1
- O
0.7
4.73-
O
O
O
3*15-
-0.3
O
-0.2
0.5
0.65
'm7'-
+ O
O + 0.4 + O
0.65 - O "0.25
O +0.5 + O
0.8 - O - 0.3
O +0.6 + O
1.0 - O - 0.4
O +O.? + 0
+
0.25
-11.8
O
Continued on page 9
8
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To
R
C l a s s LC 2
1
~~~~~
ASME B 4 . L
67
m 0759670 O573624 735 m
PREFERRED LIMITS AND FITS
T A B L E 6 LOCATIONALCLEARANCEFITS(continued
Limits are in thousandths of an inch.
L i m i t s for hole and shaft are applied algebraically
from p a g e 8 )
to t h e b a s i c s i z e to obtain the limits of size for the parts.
D a t a i n bold face are in accordance with ABC agreements.
Symbols H9, f8, etc., a r e H o l e a n d S h a f t d e s i g n a t i o n s u s e d i n ABC Systrm (Appendix I).
Class LC 6
Standard
Limits
c e,
0 U
m =
.g.- 29
0.6
3.2
0.8
4.0
+
+
+
+
S9
:E 2
1.0'- 0.3
O -0.9
1.2 - 0.4
O - 1.1
1.4-0.5
O - 1.4
0.6
3.2
0.8
3.8
1.0
4.6
+
1.6-0.6
O - 1.6
2.0 - 0.8
O -2.0
1.2
5.6
1.6
7.1
+
H7
+
Standard
Limits
E
Shaft
f8
Hole
0.3
1.9
0.4
2.3
0.5
2.8
5
az
+
+
+
Shaft
e7
- 0.6
-1.6
- 0.8
- 2.0
- 1.0
- 2.4
2.8 - 1 . 2
O - 2.8
3.5 .- 1.6
O -3.6
2.0 + 4 . 0 - 2 . 0
1.0 + 2 . 5 - 1 . 0
O - 2.6 8.5
O - 4.5
5.1
1.2 + 3.0 - 1.2 2.5 + 4.5
2.5
O - 3.0 10.0
O - 5.5
6.0
1.4
1.6
8.1
2.0
9.3
2.2
10.2
2.5
12.0
2.8
12.8
3.0
16.0
+
3.0
11.5
4.0 - 1.6 3.5
O - 4.1 13.5
+ 4.5 - 2.0
O - 4.8
+ 5.0 - 2.2
O - 5.2
+ 6.0 - 2.5
O - 6.0
+ 6.0 - 2.8
8.0
- 3.0
0 - 8.0
+10.0 - 3.5
- 3.0
O - 6.5
6.0 - 3.5
O - 7.5
4.0 i~ 7.0 15.5
O 4.5 + 8 . 0 17.5
O 5.0
20.0
+
+
O - 6.8 21.0
+
+ 5.0
+
Hole
H10
c
Shaft
d9
+ 1.6 -1.01.0
3.6 - 0
1.2 + 1.8 - 1.2
4.2 - O - 2.4
1.6 t- 2.2 - 1.6
5.2 - O - 3.0
Standard
Limits
~
;z
'2 5
26
Hole
H11
Shaft
c10
2.5 + 2 . 5 6 . 6 - - 2 O. 0 2.8 + 3 . 0 7.6 - O 3.0 + 3 . 5 8.7 - O -
3.5 + 4 .0 2.0 + 2 . 8 - 2 . 0
6.4 - O - 3.6 10.3 - O 2.5 + 3.5 - 2.5 4.5 + 5 .0 8.0 - 0 - 4 . 5 1 3 . 0 - O -
y.
2
-2
'B 2
ZÜ
Stand.ard
Limlts
O
.e $
2s
Shaft
I-
2.5
4 + 4
4
4.1
12 - 0 , - 8
2.8 4.5 + 5 - 4.5
4.6 14.5 - O - 9.5
3.0
5 + 6 - 5
5.2 17 - O
11
5 + 6 - 5
3.0 + 4 . 0 - 3 . 0
9.5 - O - 5.5 15 - O - 9
6 + 7 - 6
4.0 + 4.5 - 4.0
11.5 - O - 7.0 17.5 - O - 10.5
6 + 7 - 6
20 - O - 13
7 + 8 - 7
23 - O - 1 5
8 t 1 0 - 8
28 - O - 18
10 + 12
IO
34 - O - 22
11 + 14 - 11
39 - O - 25
+ 16 12
- 12
44 - O - 28
Hole
Shaft
6 0-11
6
6 + 7
13
20 - O
7 + 9 7
25 - O - 16
0
8 +lo- 8
28 - O - 18
lo l2
34 - O
' x i!
0.71
12+16-12
44 - O - 28
14 + 18 - 14
50 - O - 32
4.0
8.5
4.5
9.5
5.0 + 5.0 - 5.0
13.5 - O - 8.5
6
+ 6 -6
16
- O -10
7 + 9 - 7
21 - O - 12
8 + 10 - 8
24 - O - 14
+ 7 7- 7
18.5 - O -11.5
7
+8 -7
20
- O "12
10 + 12
29 - O
12 + 12
32 - O
8 +9
9.0- 5
O -11
23
- O
9
10.0- 55.0
-O
O
25 -11
6.0 +12.0 - 6
26.0 - 0 -14
7.0 +16.0 - 7
-8
-14
-9
-15
10
+12
-10
-30
-O
-18
12
+16
-12
10
17
12
20
14
- 23
- 16
- 26
16 + 18 - 16
52 - O - 34
20 + 20 - 20
60 - O - 40
22 + 22 - 22
66 - 0 - 44
25 + 25 - 25
75 - O - 50
-
28 + 30 - 28
88 - O - 58
30 + 40 - 30
14 -
14 +
37 - O
+1016 + 16
42 - O
18 + 20
50 - O
20 + 2 5
18
30
20
I
O"'
-
1.19
3'15
3-15 - 4.73
4.73 - 7-03
"O7
-
9.85
3.85 - 12.41
","
12.41
* I;!
35
115 - O
+
-
l.'"
22 + 28 - 22
78 - O - 50
28 + 30 - 28
58
88 - 0
3 :-
0.12
-
+ 22 -1616
60 - O - 38
18 + 25 - 18
68 - O - 4 3
lg ~
-
I
-
To
Over
H13
5 +
17-
-
3.5
6.3
4.5
8.0
2
2 s
Hole
H12
Nominal
Size Range
Inches
Standard
Limits
LI
- 15.75
15.75 - 19.69
40 + 50
13.69- 30.09
140 - 0 - 45
I
45 + @
30.09- 41-47
$
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
3.5
+ 3.5 - 1.4
O - 3.6
5
-IZ
'B
.-
Standard
Limits
Class L C 11
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
-
7.1
O U
2:
Hole
H10
1.6
O
1.8
O
2.2
O
c
C l a s s LC 10
Class LC 9
Class LC 8
Class LC 7
End of T a b l e 6
9
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4.73
-
-
-
-
-
-
- 12.41
- 15.75
-
0.71
1.19
1.97
3.15
4.73
7.09
9.85
12.41
15.75
COPYRIGHT 2003; American Society of Mechanical Engineers
3.15
-
0.40
19.69
9.85
7.09
1.97
1.19
0.71
0.40
-
0.24
0.24
0.12
-
-
TC
0.12
0
over
Nominal
Size
Range
Inches
Limits
and
Class
Symbols
a.6
-0.4
I
1 +2.0
1+1.4
1
H7,
I
1 +0.6
1 +0.4
+0.3
-0.3
shaft
LT
,) represents
hole
3:: I -0+le2I
“Fit
for
the
1 +3.0
I-l.0
bold
+0.6
-0.6
2
1 +l.O
I
I
1 +0.7
I
LT
Hole
interference
ate
in
algebraically
Limits
-
-0
t2.5
-0
z.8
t2.3
+2.2
-1.6
t2.0
-0
-0
t1.6
+2.0
+1.8
-1.4
t1.8
+1.6
-0
-1.1
t1.5
-1.4
-0
t1.3
+1.4
-1.0
-0.8
-0
+1.2
-0.7
+0.9
tl.1
-0
+l.O
-0
to.7
+0.8
+2.5
+3.4
+1.8
LT
5
wto.4
-2.0
-1.7
+0.3
Class
LT
+1.7
6
:-i-1 +I.0
+1.41+2/i-
I
-0
+0.7
t1.2 +2.0
- 0 + 0.8
f1.0
parts.
+o.z
+ 1.8
+ 1.6
+0.2
t1.4
fO.2
+0.2
+1.4
+O.l
-0
Gi”L6”1+1.4
End
of Table
;‘,::
Xii
61 +2.8
7
- -i-I
Y , +I.2
-
1' QI +3.2
-3,4
f0.7
Class
I).
values).
mating
to.4
-2 3
t2.7
to.2
(plus
(Appendix
the
~1
-0
4
clearance
System
for
-2.8
LT
ABC
size
t1.1
in
of
+.O.l
.+4.0
Class
used
maximum
ABC
agreements.
the
with
-2.7
-3.8
and
limits
the
FITS
to obtain
inch.
-2.4
+0.4
+l.O
+O.l
+0.8
+O.l
+0.7
+O.l
+0.6
+O.l
+ 0.5
-0.6
+O.l
+0.6
Shaft
k6
3
+0.5
Standard
Limits
LT
designations
size
of an
TRANSITION
, AI.5 +0.7
, to.6 -0
-0.5
values)
accordance
basic
thousandths
fble
H7
Shaft
Class
to.5
Fit
in
(minus
are
to the
in
-0
-
and
face
ate
7 LOCATIONAL
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I
1+2.2
I
+1.80
I
l-0.7
+2.4
-0.6
Class
etc.,
maximum
Data
applied
js6,
I
I
ate
TABLE
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
ASME B4.L
b7
m
0759b70 0573626 5 0 8
P R E F E R R E D LIMITS AND FITS
TABLE 8 LOCATIONAL INTERFERENCE FITS
Limits are in thousandths of an inch.
Limits for hole and shaft are applied algebraically to the
basic size to obtain the limits of si ze for the parts.
Data i n bold face are in accordance with ABC agreements,
Symbols H7, p6, etc., are Hole and Shaft designations
used in ARC System (Appendix I).
0.24 -
0.40
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
100.9
-13 1.9
131.9
-171.9
171.9
-200
+
+
6.0
0
8.0
2
18
- 0
4
24
+10.0
- 0
30
4
11
+18
- O +12
+24
+12
- O +16
15
31
18
38
+10
+30
- O +ZO
24
50
+16
- O
+10
+16
- O
+31
+25
+12
+38
-
O +30
+50
+40
End of Table 8
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COPYRIGHT 2003; American Society of Mechanical Engineers
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USA STANDARD
Continued from page 5
9. ModifiedStandard Fits
2 0
m -3
-2
9.1 Bilateralholeorbasicshaftsystemfits
havingthe same amounts of c l e a r a n c e or interference remain the same as those shown in Tables
5 to 9 , but the limits of s i z e a r e c a l c u l a t e d f o r
h o l e s or shafts and differ from those shown in the
t a b l e s . T h i s may be accomplished by one of the
following:
L N Z L N J
HOL ES
=WAFTSSCALE:THMISANOTHS OF ANINCH
FOR A DIAMETER OFONEINCH
-
FIG. 4 GRAPHICAL REPRESENTATION OF STANDARD
L O C A T I O N A L I N T E R F E R E N C E F I T S (SHOWN I N
T A B L E 8)
LN
(a)Bilateralholes
(SymbolB)-Thiswillres u l t in nonstandard holes and shafts.
(b) A basic shaft system (Symbol S)-This will
result in nonstandard holes and shafts.
Locationalinterferencefits
areusedwhere
accuracy of location is of prime importance
andforpartsrequiringrigidityandalignment with no special requirements for bore
fits arenotintendedfor
pressure.Such
partsdesignedtotransmitfrictionalloads
from oneparttoanother
by virtue of the
t i g h t n e s s of fit, a,s theseconditionsare
covered by force fits.
9.2 BilateralHole
Fits (Symbol B). T h e common c a s e is where holes are produced with fixed
as drillsorreamers;toprovidea
tools,such
longer wear life for such tools a bilateral tolera n c e is desired.
8.3.3 Force Fits. F o r c e or shrink fits constitute a special type of interference fit, normally characterized by maintenance of constant bore
pressuresthroughouttherange
of s i z e sT. h e
interference therefore varies almost directly with
diameter, and the difference between its minimum
is smalltomaintainthereandmaximumvalue
sulting pressures within reasonable ‘limits.
T h e s e f i t s may be described briefly a s follows:
The symbols used for these fits are identical
withstandardfitsexceptthattheyarefollowed
by the letter “B.” Thus “LC4B”is a locational
clearance fit, class 4, except that is is produced
with a bilateral hole.
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
The limits of c l e a r a n c e or interference are iden5 to 3 forthe
tical with those shown in Tables
corresponding fits.
FN 1 Lightdrivefits
arethoserequiringlight
or
assemblypressuresandproducemore
less permanent assemblies. They are suitor long fits, or in
ableforthinsections
cast-iron external members.
FN 2 Medium drive fits are suitable for ordinary
s t e e l p a r t s or forshrink fits onlight sections. They are about the tightest
fits that
c a n be usedwithhigh-gradecast-ironexternal members.
FN 3 Heavydrivefits
aresuitableforheavier
steel p a r t s or forshrinkfitsinmedium
sections.
Force f i t s are suitable for parts which can
or for shrink fits where
be highly stressed
pressing
forces
required
are
The hole tolerance is changed s o that the plus
limit isthatforonegradefinerthanthevalue
showninthetables,theminuslimitequalsthe
amount by which the plus limit was lowered, and
theshaftlimitsarebothlowered
by thesame
amount asthelowerlimit
of s i z e of thehole.
Thefinergradeoftolerancecanbefoundin
T a b l e 4.
9.3 BasicShaftFits
(Symbol S). For t h e s e f i t s
the maximum s i z e of the shaft is basic and the
a l l o w a n c ei sa p p l i e dt ot h eh o l e .T h el i m i vo f
c l e a r a n c e or interference are identical with”@se
5 to 3 forthecorresponding
showninTables.
fits. The symbols used for these fits are identical with those used for standard fits except that
“S.” T h u s “ L C
theyarefollowedbytheletrer
4, e x 4 s ” is alocationalclearancefit,class
cept that it is produced on a basic shaft basis.
FNS
3
W
2”-FNI
T
I
$
0
FN2
FN3
FN4
I
T h e limits for hole and shaft as given in Tables
5 to 9 areincreasedforclearancefits,
or dec r e a s e d for transition or interference fits, by the
value of theuppershaftlimit;thatis,
by the
amount required to change the maximum shaft to
the basic size.
FIG. 5 GRAPHICAL REPRESENTATION OF STANDARD
FORCE OR SHRINK FITS (SHOWN I N T A B L E 9 )
12
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f
~~
~~
ASME 84.1 67 0759670
0573628 380
P R E F E R R E D LIMITS AND FITS
9.4 If s t a n d a r d s t o c k s i z e s or special conditions
r e q u i r et h ?u s eo fo t h e rh o l es i z e sa n ds h a f t
sizes, reference should be made for the required
I which are taken
fit to tables in Appendix
the ABC proposal.
LAPPING
froh
a
HONING
CYLINDRICAL GRlNOlN
SURFACE GRINDING
DIAMONDTURNING
DIAMOND
BORING
BROACHING
10. Machining Processes.
REAMING
TURNING
To indicatethemachiningprocesseswhich
may normally be expected to produce work within
thetolerancesindicated
by thegradesgivenin
this Standard, Fig. 6 has been provided. This information is intended merely as a guide in selecti n gs u i t a b l ep r o c e s s e s
for a particulargrade.
BORING
MILLING
PLANING B SHAPINC
DRILLING
D
FIG . 6 MACHINING PROCESSES
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
13
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
COPYRIGHT 2003; American Society of Mechanical Engineers
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04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
USA STANDARD
T A B L E 9 FORCE ANDSHRINK
Limits are in thousandths
FITS
of an inch.
L i m i t s for h o l e a n d s h a f t a r e a p p l i e d a l g e b r a i c a l l y t o t h e b a s i c s i z e
Data in bold face are in accordance with
to obtain the limits of s i z e for the parts.
ABC agreements.
I).
Symbols H 7 , s6, etc., are llole and Shaft designations used in ABC System (Appendix
I
C l a s s FN 1
C l a s s FN 2
I
C l a s s FN 3
C l a s s FN 4
I
C l a s s FN 5
Inches
To
Over
O
-
0.12
0.12
-
0.24.
I 0.05
0.1
1.97
-
2.56
2.56
-
3.15
3.94
-
4.73
4.73
-
5.52
5.52
-
6.30
6.30
-
7.09
I
I
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
1.1
2.6
1.2
2.9
1.5
3.2
18
3:5
7.88
-
8.86
8.86
-
9.85
3.8
2.3
4.3
2.3
4.3
- 17.72
4.4
7.0
7.09
15.75
7.88
Continued on page
14
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
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15
PREFERRED LIMITS AND FITS
T A B L E 9 F O R C E AND SHRINK FITS (Continued
from p a g e 14)
L i m i t s a r e i n t h o u s a n d t h s of an inch.
Limits f o r h o l e a n d s h a f t a r e a p p l i e d a l g e b r a i c a l l y
of size for the parts.
to t h e b a s i c s i z e t o o b t a i n t h e l i m i t s
face are in accordance with ABC agreements.
Symbols H7, s 6 , etc., are Hole and Shaft designations used in ABC System (Appendix
C l a s s FN 2
Class FN 1
Nominal
Size Range
Inches
To
Over
19.69
- 24.34
24.34 - 30.09
30.09 - 35.47
35.47 -41.49,
cru
o g
:
E
!
Ëa
._ 9
48.28 - 56.19
56.19 -65.54
65.54 - 76.39
76.3 9 - 87.79
O
'
Hole
Shaft
H6
'
2 2
.* al
E2
22
z:
-u
Y &
Hole
H7
+
2.0
- O
t 2.0
- O
+
9.2
8.0
+10.2
+ 9.0
9.0
14.0
11.0
16.0
+
7.5
11.6
+
tll.6
+10.0
14.0
20.5
16.0
+ 4.0
- O
16.0
13.0
18.0
2.5
- O
+ 2.5
- O
+ 3.0
- O
+ 3.0
- O
14.0
20.5
t 4.0
- O
+20.5
24.0
+18.0
34.0
+
+
+2/r.5
29.0
+22.0
39.0
+28.0
32.0
t 6.0
+
C l a s s FN 3
Standard
Limits
al
6.0
9.2
7.0
10.2
3.0
- O
+ 3.0
- O
'
Shaft
s6
+
+
:$$
ds
Standard
Limits
__
Hole
Shaft
H7
c6
14.0
15.0
+ 3.0
12.0 20.0 - O
16.0 17.0 + 3.0
14.0 22.0 - O
+
+
+
+
Class FN 5
Class FN 4
Standard
Limits
$g
23
Hole
H7
20.0 22.0 +
18.0 27.0 22.0
27.0
+
20.0 32.0 -
3.0
O
3.0
+
+
O
+ 20.5 21.0 + 4.0 t 27.5 31.0 + 4.0
+ 18.0 27.5 - O + 25.0 37.5 - O
+ 22.524.0
t 4.0 + 30.5
36.0 + 4.0
+ 20.0 30.5 - O + 28.0 43.5 - O
+ 25.0 30.0 + 5 . 0 + 38.0 45.0-t 5.0
+ 22.0 38.0 - O + 35.0 53.08.- O
+ 28.0 35.0 + 5.0 + 43.055.0
+ 5.0
+ 25.0 43.0 - O + 40.0
63.0
- O
+ 34.0
39.0
t 6.0 t 49.0
64.0
+ 6.0
+ 30.0 49.0 - O -t 45.0 74.0 - O
+ 39.044.0
+ 6.0 + 54.0 7 4 . 0 + 6.0
+/35.0 54.0 - O + 50.0
84.0
- O
+ 45.0
52.0
+ 8.0 + 65.082.0
+ 8.0
Shaft
u6
+
+
+
+
+
+
Standard
Limits
'i;
22
$: 9
Hole
H8
30.0 +
38.0 35.0 +
43.0 -
11.0
18.0
24.5
20.0
4.0
- O
+ 5.0
+13.6
+12.0
22.5
17.0
+14.0 25.0
+18.0
20.0
+16.0
28.0
+lG.O
+ 4.0
- O
+ 5.0
- O
+ 5.0
I
-
O
6.0
- O
- O
+
8.0
+
+
+
+
+
+
+
38.0
35.0
43.0
40.0
37.5 44.0 + 6.0
35.0 54.0 - O
43.5 54.0 + 6.0
40.0
64.0
- O
53.0 62.0 + 8.0
50.0 75.0 - O
63.0
72.0
+ 8.0
60.0 85.0 - O
+
+
+
54.0
50.0
+
85.0
80.0
+
+
+
64.0
60.0
+ 75.0
+ 70.0
+
+
90.0 +10.0
106 - O
+lo6
+lo0
84.0
110
+10.0
+126
80.0 126 - O
95.0 128 +12.0
+120
+148
t 74.0
t 70.0
+
+
+
Shaft
x7
'
5.0
O
5.0
O
27.0
25.0
32.0
30.0
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
9.5
13.6
41.49 -48.28
Standard
Limits
1).
87.79-100.9
100.9 -1 15.3
115.3 -13 1.9
131.9 - 1 5 2 . 2
152.2-171.9
171.3 -200
End of T a b l e 9
15
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
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--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
Data in bold
ASME 84.1 b7
0759670 057Lb31 975
APPENDIX
I
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
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ASME 84.3 67
m 0759670 0573632 B O 3
W
APPENDIX I
Limits for Holes C to X (Continued from p a g e 16)
Tolerance Unit 0.001 in.
U-Upper Limit
L-Lower
Limit
N
-4
d
.Y
E
.M
I
O
7
o. 1
0.3
0.0
8
u+ 0.0
6
-
L-
6
L- 0.6
-
N
-
8
9-1 1
9
10
11
ULUL-
0.2
0.4
o. 1
0.5
u- o. 1
L- 0
.7
U- 0.0
L- 1.0
L- 1.6
~
7
0.4
~
L- 2.5
P
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
R
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
6
- LU7
L-
"I-
6
7
6
U
-
i
+
...
...
u- ...
L- ...
uL-
+
UL-
0.c
O.$
*
7
6
V
0.8
0.5
0.E
7
uL-
O.(
1.c
L-
...
...
L
U- L- 1.1
0.5
1.;
-
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
APPENDIX I
LIMITS FOR SHAFTS c to x
Tolerance Unit 0.001 in.
U-Upper L-Lower
Limit
Limit
Y
W
l
d
c
m
C
11.5
14.0
119.0
19.0
;::
d
I I I
10.0
12.0
15.0
7.0
I
11.5
14.0
17.0
8.0
22.0
I
13.0
15.0
9. O
19.0
25.0
e
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍI
0.7
1 1 1:;
1.6
1.8
4.4
6.0
4.8
0.6
1.4
3.5
6.0
6.0
I
I
I
4.0
6.0
6.0
0.8
0.7
1.4
1.7
1.2
I
I
[
4.5
7.0
7.0
I
I
I
5.0
8.0
8.0
Continued on page 19
18
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
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--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
APPENDIX I
LIMITS FOR SHAFTS c to x ( c o n t i n u e d from p a g e 181
Tolerance Unit 0.001 in.
U-UpperL-Lower
Limit
Limit
I
I I
D i a m e t e r s Over: To (Inches)
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
End of Table
19
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
Policy Group at 1-800-451-1584.
APPEND1X I I
TO 98 F
LENGTH DIFFERENCES PER lNCH FROM STANDARD FOR TEMPERATURES 38
Temperature 5
Deg F
t
1
38
39
40
41
42
-25
-23
-18
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
16
'17
-27
-26
-2 4
-22
-2 1
-60
-58
-56
-54
-52
-84
-8 1
-78
-120
-116
-1 12
-108
-104
-1 50
-145
-140
-135
-130
-300
-290
-280
-270
-260
-450
-43 5
-420
-405
-3 90
-600
-580
-560
-540
-520
-750
-725
-700
-675
-650
-900
-870
-840
-810
-780
-50
-48
-46
-44
-42
-75
-7 2
-69
-66
-63
-100
- 96
- 92
- 88
- 84
-125
-120
-1 15
-1 10
-105
-250
-240
-230
-220
-210
-375
-360
-345
-3 30
-315
-500
-480
-460
-440
-420
-625
-600
-575
-550
-525
-750
-720
-690
-660
-630
-40
-38
-36
-3 4
-3 2
-60
-57
-54
-5 1
-48
- 80
- 72
- 68
-100
- 95
- 90
- 85
- 80
-200
-190
-180
-1 70
-160
-300
-285
-270
-255
-240
-400
-3 80
-3 60
-3 40
-320
-500
-475
-450
-425
-400
-600
-570
-540
-510
-480
- 60
- 56
- 52
- 48
- 44
- 40
- 36
- 32
- 28
-
- 70
- 65
- 60
-150
-140
-130
-120
-Il0
-225
-2 10
-195
-180
-165
-300
-280
-260
-2 40
-2 20
-375
-350
-325
-300
-275
-450
-420
-3 90
-
-100
- 90
- 80
- 70
- 60
-1 50
-135
-120
-105
- 90
-200
-180
-160
-140
-1 20
-250
-225
-200
-175
-1 50
-300
-270
-240
-210
-180
-90
-8 7
48
49
50
51
52
-20
-19
53
54
55
56
57
-1 5
-14
-13
-12
-11
-3 O
-28
-26
-24
-22
-45
-42
-3 9
-3 6
-33
58
59
60
61
62
-10
-9
- 8
- 7
-6
-20
-18
-16
-14
-30
-27
-2 4
-2 1
-18
66
15
-28
43
44
45
46
47
63
64
65
10
-30
-29
67
68
69
70
71
72
73
74
75
76
77
78
-17
-16
6
degree F, X 10
4 2
3
15
10
3020
25
Total change in length from standard, microinches per inch of length*
Coefficient of thermal expansion of material
per
-12
- 76
-
64
-
24
75
- 55
-
50
45
40
35
30
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
79
80
81
82
83
84
85
86
87
88
89
94
95
-
5
4
3
2
- 1
O
1
2
3
4
5
6
7
8
9
11
12
13
14
18
19
20
21
97
26
27
28
29
98
30
96
-10
- 8
- 6
- 4
- 2
O
-15
-12
-9
- 6
- 3
O
3
6
9
12
- 20
- 16
- 12
- 8
- 4
- 25
- 20
- 15
-
10
5
- 50
40
- 30
- 20
10
-'
- 75
-
60
45
30
15
-100
- 80
- 60
- 40
- 20
-125
-100
- 70
- 50
-
25
O
O
O
O
O
4
12
16
20
5
10
15
20
25
15
30
45
60
75
20
40
60
80
100
25
50
75
1O0
125
90
105
120
135
150
120
140
160
180
200
150
175
200
225
2 50
10
12
14
16
18
20
21
24
27
30
18
24
28
32
36
40
30
35
40
45
50
22
24
26
28
30
33
36
39
42
45
44
48
52
56
60
55
60
65
70
75
110
120
13O
140
150
165
180
195
210
225
2 20
240
260
280
3 O0
275
300
325
350
375
32
34
36
38
40
42
44
46
48
50
48
51
54
57
60
63
66
69
72
75
64
68
72
76
80
84
80
85
90
95
100
92
96
1O0
105
110
115
120
125
240
255
270
285
300
3 15
33O
345
3 60
375
320
3 40
3 60
3 80
400
420
440
460
480
500
52
78
81
84
87
90
104
1O8
112
116
120
130
135
140
145
150
160
170
180
190
200
210
220
230
240
2 50
260
270
280
290
300
3 90
405
420
43 5
450
520
540
560
5 80
600
400
425
450
475
500
525
550
575
600
625
650
675
700
725
750
4
6
8
54
56
58
60
15
8
88
For intermediate coefficients add appropriate listed values. For example, a length change
-150
-120
- 90
- 60
- 30
0
O
10
20
30
40
50
60
70
80
90
1O0
2
-360
-3 30
30
60
90
120
150
180
210
240
270
300
330
3 60
390
420
450
480
510
540
570
600
63 O
660
690
720
750
780
810
840
8 70
900
for a coefficient of
7 i s the sum of values in the 5 and 2 columns. Fractional interpolation maybe similarly calculated.
*Or hundredths of micron (microns/100) per centimeter.
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
20
04:52:58 MDT Questions or comments about this message: please call the Document
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免费下载
APPENDIX II
LENGTH DIFFERENCES PER CENTIMETER FROM STANDARDTEMPERATURE O TO 40
4 ature
Deg
3
1
2
15
10
25
20
30
Total change in lengthfrom standard, hundredths of microns (microns/lOO)per centimeterof length.
c
O
-20
-19
-18
-17
-16
1
2
3
4
5
-30
6
7
8
-24
9
10
11
12
13
14
-20
15
16
17
18
19
-15
-14
-13
-12
-11
-26
-22
-10
9
-18
7
6
-16
-14
-12
-
8
- 8
-80
-45
-42
-39
-36
-33
-60
-56
-52
-48
-44
-30
-27
-24
-21
-40
-36
-32
-28
-24
-18
-15
-12
-9
- 6
- 3
-100
- 95
-76
-72
-68
-64
-3 O0
-285
-270
-255
-240
-400
-3 80
-360
-3 40
-3 20
-500
-475
-4 50
-425
-400
-600
-570
-540
-510
-480
-22 5
-2 10
- 60
- 55
-150
-140
-13 O
-120
-1 10
-165
-3 O0
- 280
-2 60
-240
-220
-3 75
-3 50
-325
-3 O0
-275
-450
-420
-390
-360
-330
- 50
-100
-1 50
-13 5
-120
-105
- 90
-200
-180
-160
-140
-1 20
-250
-3 O0
-270
-240
-2 10
-
-1 O0
- 80
-125
-100
- 75
- 50
- 25
- 90
- 85
- 80
- 75
- 70
- 65
- 45
- 40
-
-20
-16
-12
35
30
25
- 20
- 15
-200
-190
-180
-170
-160
-
90
80
70
60
50
- 40
- 30
-195
-180
75
60
- 45
- 30
- 15
-22 5
-200
-175
-150
- 5
-
20
10
-
-
60
40
20
O
O
O
O
O
O
O
0
2
4
6
3
6
9
12
4
5
8
10
10
20
30
40
15
30
45
60
20
40
60
30
80
25
50
75
100
120
90
1O0
120
140
160
180
125
150
175
200
225
150
180
210
240
270
200
220
2 40
2 60
280
250
275
3 O0
325
3 50
3 O0
330
360
390
420
300
320
3 40
3 60
380
400
3 75
400
425
4 50
475
500
450
480
510
5 40
570
600
25
5
6
7
8
9
10
12
28
16
18
10
20
8
11
12
24
- 4
10
O
3
4
14
- 2
-
- 8
-1 50
-120
- 90
- 60
- 30
1
2
26
- 6
- 4
-180
O
22
35
36
37
38
39
40
-10
-60
-57
-54
-5 1
-48
ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
- 2
- 1
23
24
30
31
32
33
34
-40
.-38
-36
-34
-32
-28
5
- 4
- 3
20
21
27
28
29
x 10
C,
Coefficient of thermal expansion of material per degree
Temper-
5
CELSIUS
l14
3
l5
16
17
18
20
l9
18
l5
21
24
27
48
26
28
30
33
36
39
42
30
32
34
36
72
38
40
48
45
51
54
57
60
22
12
16
15
20
20
24
25
30
35
40
45
50
60
70
50
55
60
65
70
100
75
150
160
170
180
190
200
32
36
40
44
52
56
60
64
68
76
80
80
85
90
95
1O0
80
90
110
120
130
140
75
105
120
135
150
165
180
195
210
225
240
255
2 70
285
300
60
90
For intermediate coefficients add appropriate listed values. For example, a length change for a coefficient of
11 is the sum of the values in the 10 and 1 columns. Fractional interpolations may be similarly calculated.
*Or microinches per inch.
1C = 1.8 F
21
--``,````,````,``,`````,,````,,-`-`,,`,,`,`,,`---
COPYRIGHT 2003; American Society of Mechanical Engineers
Document provided by IHS Licensee=Cummins Engine/1232502100, User=, 10/17/2003
04:52:58 MDT Questions or comments about this message: please call the Document
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