Injection-Molded Sprocket Set 8T GM

Description

This four-pack of 8-tooth injection-molded sprockets comes with two idler sprockets (with 1/4? holes) and two sprockets with 7-mm holes for use with for use with Solarbotics GM2 , GM3 , GM8 , and GM9 gearboxes and the larger Pololu plastic gearmotors . The track links and pins are sold separately. These 8-tooth, injection-molded sprockets are made to work with the rugged miniature tank tracks . This set comes with four sprockets made from sturdy, black ABS plastic: two sprockets for mounting on the 7-mm shafts of 228:1 offset , 120:1 offset , 200:1 90-degree , and 120:1 90-degree pololu plastic gearmotors or Solarbotics GM2 , GM3 , GM8 , and GM9 gearboxes, and two idler sprockets with 1/4? holes that you can mount using shoulder bolts . The diameter of the sprocket by itself is 1.5?. Once the rugged miniature tank tracks are around the sprocket, the total diameter is roughly 1.77?.