There are two possibilities:
1.You have standard gearbox.
Yes, just make sure the motor size and shaft can match your gearbox.
2.You don’t have standard gearbox, and you want use our existing gearbox.
Yes, we can custom geared closed-loop stepper motor for you. As our gearbox is not standard one, we should custom made the motor shaft to match the gearbox. Usually, the MOQ is 5pcs, and lead time is about 20 days. Please contact our customer service to request the quotation. Plus, we will have standard gearbox online soon in year 2020.