5103 Series Planetary Gearbox (139:1 Ratio, 24mm Length 8mm REX™ Shaft)

This planetary gearbox is a direct replacement to the gearbox found on the 5203-2402-0139 Yellow Jacket Planetary Gear Motor. This gearbox is packed with features, such as the goBILDA pattern in the face, clearance cuts for nearby components, and a beefy 8mm REX™ output shaft to drive your favorite 8mm REX™ components!