Servocity - .250 bore pinion gear schematicsChannel with gears and sprocketsgearmotor driving gears on channel 4 These 1/4” bore, 32 pitch pinion gears are compatible with our 1/4” Stainless Steel D-shafting. Simply slide them on and tighten the 10-32 set screw. These gears have a 20 degree pressure angle. Manufactured from hardened brass gear stock.