Manual RHGSE Operation and Maintenance Manual ZOM-11000-2 v2 rev E
Zephyr International llc
Page 30 of 40 United States Patent # 7,429,031 B1
7.15 Checking the Capstans
It is essential to replace the capstans when the pitch diameter of the first groove, of the
lower roller becomes too small. To check the pitch diameter a 6-7 inch micrometer is required
and a set of pins of the correct diameter is required.
There are several capstans available for the different size cables in use. It is important to use
the correct style capstans for the type of cable being serviced. The following table lists the
relevant dimensions for each capstan style
Cable Diameter
Lower Capstan Part
number
Measurement Pin
diameter
Minimum dimension
over pin
3/16 inch
ZGS-10113-20-1 .185
6.745
in
4.5 mm
ZGS-12474-1 .175
6.725
in
5/32 inch
ZGS-10113-30 .156
6.715
in
3.5 mm
ZGS-10340-1 .132
6.695
in
1/8 inch
ZGS-10113-40 .120
6.685
in
Note: ZGS-12474-1 can be used for 3/16 and 4.5 mm cables.
