Which option is not a listed mounting option for a motor driving a mechanical transmission?

• A. Foot mount
• B. C-face mount
• C. Adjustable motor base
• D. Side mount plate

Answer: (D)

Mounting a motor to drive a mechanical transmission is all about providing rigid support and precise shaft alignment. The common ways achieve that: foot mounting uses the motor’s feet to bolt to a base, giving solid bottom support; C-face (flange) mounting attaches via the motor’s flange to a matching surface on the gearbox or a direct-flange interface, which keeps the shaft alignment tight and minimizes runout; an adjustable motor base lets you fine-tune the motor’s position to align belts, pulleys, or a coupling exactly. A side mount plate isn’t a standard, widely used option because it doesn’t typically offer the same stable, predictable interface or easy alignment with the gearbox input. It can require custom fabrication, and may introduce misalignment or reduced rigidity, increasing vibration and wear. That’s why it isn’t considered a listed mounting option for motor-to-transmission setups.