90 Tooth Hub-Mount Gear (MOD 0.8, 4mm Thick Acetal)

The 90 tooth, MOD 0.8 gear can mate with any MOD 0.8 gear, but when building on pattern, the most common partner for this gear is a 30 tooth pinion gear or servo gear. Using the pinion gear, you can create a 3:1 underdrive or overdrive setup (depending on your application).  When used with the 30 tooth servo gear, this combo creates a 3:1 underdrive that facilitates slower speed and three times the torque.