GreyT Telescope - User Guide
(Rev 1)
Page 16
wcproducts.com
Gearbox - Step 1
The Drum must be cut to the correct length for the Gearbox Configuration you are
assembling. The table down below shows the correct lengths for each base tube size.
All #10-32 bolts will thread into the 7/8” OD Roller Hubs after they have been pressed
into the Drum. The Roller Hubs should be a press fit and may be pressed in with an arbor
press.
Warning: When assembling the drum, it is critical that the hexes for the roller hubs are
lined up. In order to do this it is recommended to press one Hub in, and then line up
the second Hub with the first Hub using any long piece of 1/2” hex.
Base Tube Size
Correct Drum Tube Length
1-1/2”
1-1/16”
2”
1-9/16”
2-1/2”
2-1/16”
3”
2-9/16”
