Which kinds of bearings are used when a motor is to be mounted horizontally?

Which kinds of bearings are used when a motor is to be mounted horizontally?

• A. Radial
• B. Thrust bearings
• C. Ball bearings
• D. Journal

Answer: (A)

Radial bearings are used when a motor is mounted horizontally because the main loads on the shaft are directed perpendicular to the shaft’s axis. With a horizontal mount, gravity and operating forces push on the rotor sideways, creating radial forces that these bearings are designed to support. Thrust bearings, which resist axial forces along the shaft, aren’t the primary concern in this orientation unless there’s a significant end‑thrust from gears or belts. Ball bearings are a common type of radial bearing, but the key idea is the load direction they handle; in this case the important category is radial bearings.

Radial bearings are used when a motor is mounted horizontally because the main loads on the shaft are directed perpendicular to the shaft’s axis. With a horizontal mount, gravity and operating forces push on the rotor sideways, creating radial forces that these bearings are designed to support. Thrust bearings, which resist axial forces along the shaft, aren’t the primary concern in this orientation unless there’s a significant end‑thrust from gears or belts. Ball bearings are a common type of radial bearing, but the key idea is the load direction they handle; in this case the important category is radial bearings.