Novak steel pinion gears are eesigned to mesh with the Novak HV series of brushless motors and other brushless motors with a 5mm output shaft. These shafts with the HV series of brushless motors can be used to power monster trucks including Traxxas E-Maxx, HPI E-Savage and Kyosho Twin Force Nickel plated to resist corrosion and designed with ultra precise concentricity to prevent wobbling. Each gear stamped with number of teeth for easy identification.
Installing on motor shaft and tightening set screw
what can i say, they are pinions...made of steel, they attach to a 5mm motor shaft and make the spur gear turn and stuff. I'm using a Tekin Pro4 4600kv on a Team Associated SC10 4x4. I have 12t to 17t now... they seem sturdy and make the truck go vrrrrrooooooooommm!!!