With the REV 12 Tooth Metal Pinion Gear you can make your own gearboxes using other REV metal gears! This pinion is intended to be pressed onto a bare HD Hex Motor (REV-41-1291) shaft in place of the stock pinion. It can also be used with any 550 series motor with a 0.125" output shaft.
REV metal gears are NOT compatible with REV plastic gears.
*We recommend a small drop of retaining compound such as Loctite 609 to ensure a snug fit.