Add your own stepper or servomotor to our NEMA gearboxes. Highly Efficient - helical-spur geartrains transmit 96% of the available power per stage, leading the industry. Low Backlash Ratings - less than 60 arc-minutes, create the ideal gear reducer for applications such as process conveyors, pumps, and dispensers. 200% Shock Load Capability - is standard in the Multi-Tech product offering, as it is in all of Bison's products. Gloss Black Powder Coat Finish - provides the durability needed for demanding environments. Grease lubricated for all position mounting. Input Features: 1/4" diameter, for NEMA 23 mounting