This size 57mm short planetary gearbox has a gear ratio 4 to 50 and low backalsh from 30arc-min to 45arc-min. It’s an excellent choice for applications that require good accuracy and stable reliability at an exceptional value. Wha’s more, this inline short planetary gearbox has a built-in input shaft coupling which can match any standard NEMA 23 stepper motor and brushless dc motor or other motors. Please note this extended gearbox are recommended for the motor has shaft length 14mm.
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