SPEED GEAR 500/600 2,8:1 Graupner 1717.1 Gearbox alone, for SPEED 500 and 600 electric motors. The two-stage gearbox is fitted with hardened steel gears, the 3,2 mm Ø output shaft is also of hardened steel and runs in twin ballraces. The gearbox layshaft is supported in two needle roller bearings. The motor pinion supplied has to be pressed onto the motor shaft using a parallel-jaw vice or a mechanical press. Weight approx. 45 g.
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