Engineering 22
Dimensioning
Part-2
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
1
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Chp.8 Learning Goals
 Apply Proper/Conventional
Dimensioning Standards to Adequately
Describe a Physical Object (e.g., a
Machined Part) Such that It may be
Properly Fabricated
 Use AutoCAD to Dimension to
Standards Orthographic Projections
Views in Both Dimension-Line and
BaseLine Forms
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
AutoCAD Dimensioning
 AutoCAD does SEMI-AUTOMATIC
dimensioning
• You select the features which should be
dimensioned and the location for each
dimension
 AutoCAD measures the distance in
question and applies the appropriate
dimension
• Complete with arrowheads, extension
lines, and dimension lines
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Invoke ACAD Dimensioning
 Turn on the Dimensioning ToolBar
 Use the PullDown Menu
 Type in Using Command Line
 dimlinear
 dimbaseline
 dimdiameter
 dimcontinue
 dimradius
 dimordinate
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Live Dimension Demo
 Let’s Dimension some simple parts
 DimLine Example
Engineering 22 – Engineering Design Graphics
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 BaseLine (Ordinate)
Example
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles - 1
 Lets copy from the
DimLine example
the Part-Drawing,
but NOT The Dims
Using
• Dim Layer-Off
• Select-All &
CopyClip
• Paste
 Open New file using
Acad.dwt
Engineering 22 – Engineering Design Graphics
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 Then apply DimLines
using DimLin to yield
 The Dims are OUT of
PROPORTION
Relative to Object
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 2
 Fix this Lack of
ProPortion Using a
Dimension Style
 Activates the
DimStyle Dialog Box
• Estimate that Arrows
& Text are about 4X
too Large
 Adjust overall
Proportions by
Engineering 22 – Engineering Design Graphics
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 New Layer at ¼-Scale
& 3-Decimals
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 2
 After Clicking New...
Name the New
“Style” “_25X-3Plcs”
 Clicking Continue
→ Automatically
Directed to “Fit” Tab
Engineering 22 – Engineering Design Graphics
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 New Layer at ¼-Scale
& 3-Decimals
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 3
 Next Select “Primary
Units” Tab
 Set “Unit Dimensions”
Precision → 0.000
 Let’s Also Change the
“Angle Dimensions”
Precision → 0.0 (in
degrees)
 Click OK to accept
Changes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 4
 Taken Back to Dim
Style Mgr
 Select Style: “_253Plcs”
 For this style “Set
Current”
 Click Close to Activate
the _25-3Plcs Style
 Now Use “Match
Properties” to Fix Dims
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 5
 Use DimLin to ADD
a part-width
Dimension
 Next, Pick the NewDim, then Hit the
MatchProp Tool
 Note the New Dim
0.844
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 6
 Click the OverSize
Dims one-at-a-time
with the MatchProp
Paint Brush
 Click All Dims to Yield
Too Far
Not Between Ext Lines
 Still Some Style Probs
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 7
 Additional Style Fix
• Put Dim Between
arrows When
Possible
 Again Active Dim
Style Mgr
• This Time Pick
Modify
 Then Pick the Fit Tab
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 8
 Under “Fit Options”
Pick “Arrows”
 Click OK to Return to
Dim Style Mgr
 Click Close to Activate
the Modifications to
Style: “_25-3Plcs”
 Find that The 0.219
Dim Fixed
Automatically
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 9
 The Modified Result
 The OverSize Spacing
on the BaseLined
Width Dims is a
LEFTOVER from the
“Standard” Dim Style
 Erase the Width
Distances and Re-Dim
with the Modified Style:
“_25-3Plcs”
Fixed Automatically
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Dimension Styles – 10
 The Final Result of the Dim Style
Management
 Looks Much Better
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Explore Dimension Styles
 I Suggest that you
spend some Time
Exploring the Result
of Dim Style
Changes; e.g.
Engineering 22 – Engineering Design Graphics
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 Can Now “Slide” the
Dim-No. Location Lt-Rt
or Up-Dwn
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Place Text Manually Result
 Dim No. Slid to the Right in this case
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Caveat - Dim Styles
 Dim Styles Have Frustrated The
Instructor (me) for Years
 Even with Extensive Hacking, I still get
Unpleasantly Surprised by the Result
From Dim Style Management
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
0 .0 9 0
0 .2 3 4
0 .2 1 9
0 .2 3 4
0 .8 4 4
Be SURE
to Read the
APPENDIX
0 .4 3 7
All Done for Today
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Engr/Math/Physics 25
Appendix
f x   2 x  7 x 
9x  6
3
2
Bruce Mayer, PE
Licensed Electrical & Mechanical Engineer
BMayer@ChabotCollege.edu
Engineering 22 – Engineering Design Graphics
21
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
DimLine Demo - 1
1. Open File
•
DimLine_Dim_Exa
mple_016_Hinge_S
pacer_0305_.DWG
2. Strip Out Existing
TitleBlk & Dims
•
Turn off all Layers
but DIM
3. Set Snap to 0.1”
Engineering 22 – Engineering Design Graphics
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4. DimLinear
•
TopLeft-Corner to
circle-ctr-line
5. DimBaseline to
complete width
dims
6. On Left-Edge Dim
Ht to Hole (0.219)
7. On Rt-Edge Dim
Part Ht (0.437)
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
DimLine Demo - 1
8. Make xline from
0.234 arrow
9. On Side-V dim
0.09 thickness
using nea to place
arrows on xline
10. Erase the xline
11. From Rt-Circ make
xline using
@10,<-60
Engineering 22 – Engineering Design Graphics
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12. Leader to Circle
Boundary, nea to
xline
13. Leader Text
making Ø w/ %%c
•
%%C0.219, 2X
14. Use Mtext to make
Note
•
Light Break, All
Sharp Edges
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
DimLine Demo – 3 (result)
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 1
1. Open File
•
BaseLine_Dim_Exa
mple_009_DrvCage_HingeRetainer_0305_.D
WG
2. Strip Out Existing
TitleBlk & Dims
•
Turn off all Layers
but DIM to delete
dims
4. Call Fabricator and
ask where the
preferered Origin
•
They Say UPPERLEFT
5. Make xLines that
coincide with the
TOP and Left
Edges
3. Set Snap to 0.1”
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 2
6. Move the User
Coord System
Origin to the
intersection of the
two xLines with the
UCS command
•
Use the NEW
option
7. Offset Left the
vertical xLine by 1”
•
9. Pick the top-Lt
Chamfer, and
move to offset xline
•
Shows 0.000 as
Dim
10. Pick Lt end of LtC’Sink CtrLine
For Y-Dims
Engineering 22 – Engineering Design Graphics
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8. Invoke Ordinate
Dimensioning with
DimOrd
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 3
11. Move Left to the
offset xLine using
the “per” option
•
Sets Y-Dim to 0.375
12. Pick the Bot-Lt
Chamfer, and
move to offset xline
using “per” option
13. Offset UpWard the
Horiz. xLine by 1”
14. Pick the Lt-Top
Chamfer, and
move to offset xline
•
Shows 0.000 as
Dim
15. Pick Top end of Lt• Sets Y-Dim to 0.750
C’Sink CtrLine
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 4
16. Move Up to the
offset xLine using
the “per” option
•
Sets X-Dim to
0.550
17. Repeat 15 & 16 for
C-Sinks and Rt
Edge to Complete
all the X-dims
•
•
2.800, 5.800, 8.050
8.600
 Next Dim Side-V
18. Make xLine with LtVertical Edge
19. Offset Lt xLine by
1.00”
20. Use DimLin to
“Arrow Dim” at
xline Locations
•
•
Height = 0.750
Thickness = 0.90
21. Next Add-Notes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 5
22. Make xLine at BotEdge
23. Offset-Down xLine
by 1.5”
•
Leader Text =
“CHAM 0.12 X 45°,
4X”
– Use “Alt248” to make
degrees symbol (°)
24. Make xLine at RtBot Chamf using
“mid” & @10<-45
26. Make xLine from
ctr of Lt-C’Sink with
@10<-60
25. Leader from
Chamf. MidPoint to
Xline @45°
27. Leader from xLine
and C’Sink
intersection
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 6
•
2-Lines of Leader
Text as

See Next Slide for
Result BEFORE
Stripping Out the
xLines

Note: When
Possible Use
ASME Y1.1
Abbreviations
– %%C0.150 THRU,
CSK
– %%C0.282 X 100°,
4X
28. Offset-up Top-Edge
xLine by 2”
29. Use Leader to
Label Part-No. Box
with Reference to
Note-2
Engineering 22 – Engineering Design Graphics
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•
See List in
Appendix
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 7
 Just Before Erasing Construction Lines
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
OrdDim Demo - 9
 Erasing Construction Lines using Erase
+ Crossing
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Insert Csink, Cbore, Depth Syms
 2X click dim boxes to activate MText
dialog Box
 Got to Symbol tool
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Insert Csink, Cbore, Depth Syms
 GoTo OTHER on
PullDown Menu
 Activates the
Character Map
with the current
Font as default
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Insert Csink, Cbore, Depth Syms
 Pick AutoCAD’s
GDT Font
Engineering 22 – Engineering Design Graphics
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 Pick Select &
Copy Symbol
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Insert Csink, Cbore, Depth Syms
 Paste Symbol into MText box that
serves as text for the DimLeader
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Counter-Drilled Holes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Counter-Sunk Holes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Counter-Bored Holes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Spot-Faced Holes
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Threads & Knurls
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
Chamfers
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
ASME Y1.1 Std Abbreviations
 Alloy → ALY
 Bolt Circle → BC
 Aluminum → AL
 Brass → BRS
 American Wire
Gage → AWG
 Broach → BRO
 Assembly → ASSY
 Chamfer → CHAM
 Auxiliary → AUX
 Circle → CIR
 Bevel → BEV
 Cold Drawn Steel →
CDS
 Bill of Material →
B/M
Engineering 22 – Engineering Design Graphics
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 Center Line → CL
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
ASME Y1.1 Std Abbreviations
 Cold Rolled Steel →
CRS
 Degree → ° or DEG
 CounterBore →
CBORE
 Diameter → DIA
 CounterDrill →
CDRILL
 Engineer → ENGR
 CounterPunch →
CPUNCH
 CounterSink → CSK
Engineering 22 – Engineering Design Graphics
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 Design → DSGN
 Elevation → EL
 Existing → EXIST.
 Flat Head → FH
 Gage or Gauge →
GA
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
ASME Y1.1 Std Abbreviations
 Hardware → HDW
 Maximum → MAX
 Hot Rolled Steel →
HRS
 Millimeter → MM
 Inch → “ or IN
 Mounting → MTG
 Inside Diameter →
ID
 National → NATL
 Keyway → KWY
 Laminate → LAM
 Material → MATL
Engineering 22 – Engineering Design Graphics
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 Minimum → MIN
 North → N
 Number → NO.
 Obsolete → OBS
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
ASME Y1.1 Std Abbreviations
 Outside Diameter →
OD
 Radius → R
 OverAll → OA
 Point → PT
 Room Mean Square
→ RMS
 Polish → POL
 Round → RD
 Pound → LB
 Screw → SCR
 Pounds per Sq-Inch
→ PSI
 Sheet → SH
 Push Button → PB
 Steel → STL
Engineering 22 – Engineering Design Graphics
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 Required → REQD
 Spot Face → SF
Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt
ASME Y1.1 Std Abbreviations
 Structural → STR
 Washer → WASH.
 Taper → TPR
 Week → WK
 Thick → THK
 Wrought → WRT
 Thread → THD
 Yard → YD
 Through → THRU
 Tolerance → TOL
 Feet → ‘ or FT
 Typical → TYP
 Mile → MI
 Versus → VS
 Volume → VOL
Engineering 22 – Engineering Design Graphics
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Bruce Mayer, PE
BMayer@ChabotCollege.edu • ENGR-22_Lec-17_Dimensioning-2.ppt