HTD Belt Pulleys

[m5burndt]

Hi all, Team 4256 here.

Our team would like to stick with the belt system supplied with the KOPS, However, for volume reasons, we would like to use the old Andymark CIMple boxes instead of the larger Tough-boxes that came with this year's KOPS.

This is convenient because they both have the same 1/2" keyed output shaft.
HOWEVER, the CIMple gearbox has a reduction of 12/56 or approx 5:1
Whereas the KOPS toughboxes have approx 10:1 (per 2013 drive system specs on andymark site)

We could simply fit the pulley on the shaft, but because the CIM boxes don't reduce as much we would be zipping around at somewhere near 29 ft/sec (waaay to fast to be controllable)

To maintain the same overall drive ratio with a controllable speed, we would need a pulley with about HALF the teeth of the pulley used with the Toughbox. I am having a hard time finding another pulley that is the correct pitch/width, bore size, etc.