Klaus Stein
Gear types supported by GEARPAK
Gear types supported by GEARPAK
Date:
Author:
1
Document version: 3.01
February 26, 2009
Klaus Stein
Involute gears
GEARPAK can measure involute gears.
The flank form of the gear has to be an involute. The term "involute" can be found on
the drawing. If this term is not given some gear parameter can indicate that this is an
involute gear. If a base diameter is given it can be assumed that it is an involute gear.

2
Input the nominal gear geometry parameter (e.g. number of teeth,
module/diametral pitch, pressure angle,…) given on the drawing into
GEARPAK and compare the calculated value for base diameter and pitch
diameter (= reference diameter) with the diameters on the drawing. If the
diameters are identical to those on the drawing you can be sure that this is
an involute gear.
Gear types supported by GEARPAK up to now
Gear type
Touch trigger
meas.
Scanning meas.
cylindrical gear
(spur)
yes
yes
cylindrical gear
(helical)
yes
yes
scanning with
SP25 since v3.1
only scanning
with MRT1 since
v3.0
worm (cylindrical)
yes
yes
worm (enveloping)
no
no
1
Remarks
measurement
only as a
cylindrical gear
worm wheel
(cylindrical)
yes
yes
worm wheel
(enveloping)
no
no
bevel
yes
no
only for
GLEASON gears
hypoid
yes
no
only for
GLEASON gears
MRT = Mitutoyo rotary table which can be rotated during the measurement
February 26, 2009
Document v3.01
1 of 2
Gear types supported by GEARPAK
Program
version
3
Klaus Stein
Cylindrical
gear
Worm
Worm
wheel
Bevel
Hypoid
gear with missing
teeth/gaps
2.2
yes
-
-
-
-
-
2.3
yes
yes
-
yes2
yes2
-
2.4
yes
yes
-
yes2
yes2
-
3.0
yes
yes
-
yes2
yes2
-
3.1
yes
yes
-
yes2
yes2
-
Remarks
1.
2.
Cylindrical gear
a.
External and internal gears can be measured.
b.
Spur and helical gears can be measured.
c.
Spur gears can be measured in scanning and in touch trigger mode.
d.
Helical gears can be measured in scanning and in touch trigger
mode. The scanning measurement can be performed with an
indexable probe head (e.g. PH10Q) and SP25 or with rotary table
(MRT).
e.
Cylindrical gears can be measured as complete gear or as segment
(simple segment, specified by number of teeth of segment).
f.
Cylindrical gears with modification can be measured.
Worm
a.
Cylindrical worms can be measured. Enveloping worms can not be
measured.
b.
The following worm types are supported: ZI, ZK, ZA, ZN.
c.
Cylindrical worms can be measured in scanning mode in
combination with the MRT1.
2
bevel and hypoid gears from GLEASON can be measured; development is done by
KDC Gr.5
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Document v3.01
February 26, 2009