MA vs MB Spherical Roller Bearings

2026-09-11 15:48:10

MA and MB Spherical Roller Bearings are professional heavy‑duty models designed for high‑frequency vibration and continuous high‑temperature working conditions. Ordinary CA and CC bearings are easy to fatigue failure on vibrating screening equipment.

MA bearings adopt outer ring guided brass cages, which are specially optimized for vibrating screens and feeders. They effectively resist alternating vibration stress and avoid cage fracture, becoming the standard configuration for mining screening machinery. Matching with C4 clearance and W33 grease groove greatly extends service life.

MB bearings adopt inner ring guided structure with excellent high‑temperature resistance and thermal stability. They are widely used in rolling mills, paper dryer cylinders and large low‑speed gearboxes under continuous heavy loads and high temperatures.

MA is for vibration working conditions, while MB is for high‑temperature steady heavy loads. The two structures are mutually exclusive with CA, CC and E types, helping engineers achieve accurate bearing selection for harsh industrial environments.