GT2 160 Tooth Pulley Knob for HV-4 Rotary Table

This is a pulley gear that slips over the knob of a Vertex HV-4 rotary table so that the rotary table can be driven by a stepper motor. The gear is 160 tooth and driven by a 20 tooth gear on a stepper motor with 1.8 degree steps. This results in 400 steps per degree of rotation of the rotary table.

The design was motivated by thing:513064 and uses the gear design from thing:16627