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Universal gear set with 10T (round hole and hex hole), 20T, 30T and 40T gears, two of each. Includes three hex and three round bushings for single-stage gearing, and two hex and two round bushings for two-stage. Spacers, hex shafts, 3mm round screws and 3mm tapping screws are included. A gear with its bushing is about 6mm thick, and 6mm and 12mm spacers come with it. The gears are molded in light blue POM, so they run smooth without grease. Bushings slide onto the center holes of the 20T, 30T and 40T gears for hex shafts and round screws, and can come off even after assembly. The tooth design lets gears mesh at 90 degrees, and mixing gears gives you many ratios. Module 1 teeth suit 5mm attachment spacing and make motion easy to see. Tooth counts are molded into each gear. Tapping screw holes let you use gears as cranks or attach universal arms and plates directly. Fits: general hobby universal fit car parts
