Many material handling applications require the use of a motor joined to a gearbox, or reducer, in order to get a great deal of torque in a small footprint. There are two basic ways of achieving this task.
Gearbox and motor permanently coupled together
Sold as a single unit
Pinion gear driving the gearbox is directly mounted to the drive shaft of the motor
Perfect, permanent alignment between motor and gearbox with zero loss in mechanical efficiency
Shorter in axial length
Option to add integrated brake or encoder
Tip #1 – Use integral AC gear motors to optimize efficiency, size, weight, and alignment.
Gearbox and motor coupled together via an adapter
Gearbox with adapter and motor sold separately
Modular design allows for different types of motor frames (NEMA, Servo, IEC)
Caution points- Shaft connection point is prone to corrosion and fretting if not assembled correctly- Adapter should use a two bearing design to prevent axial forces from being applied into the motor causing premature failure