Spherical Roller Bearing Suffix Selection Guide

2026-09-11 15:46:51

Spherical Roller Bearings are widely used in heavy-duty industrial equipment including mining, metallurgy, cement and mechanical transmission. Many equipment failures are caused by incorrect bearing suffix selection, even if the basic bearing model is correct.

Different suffixes represent completely internal structures, cage types, load capacity and vibration resistance, though the outer mounting dimensions remain the same. They cannot be replaced blindly.

CC type bearings adopt stamped steel cages, featuring low friction and cost performance. They are suitable for stable running equipment such as fans and conveyors.

CA type bearings use solid brass cages with higher rigidity and better shock resistance, serving as the standard general-purpose type for most industrial machinery.

MA and MB are high-grade split brass cages. MA (outer ring guided) is specially designed for vibrating screens with excellent anti-vibration performance. MB (inner ring guided) features high temperature resistance and stable heavy-load performance for rolling mills and dryers.

E/E1 optimized internal structure increases dynamic load rating, ideal for limited installation space and long-service-life working conditions.

Structural suffixes CA, CC, MA, MB and E are mutually exclusive. Only one structural type can be applied to one bearing model.

Auxiliary suffixes can be freely combined. K stands for 1:12 tapered bore for easy installation and removal. W33 means outer ring grease groove for continuous re-lubrication. C2, C3, C4 represent different radial clearances for precise working condition matching.

BS2 sealed spherical Roller Bearings are pre-greased and maintenance-free, suitable for dusty environments with inconvenient daily maintenance.

Correct suffix selection is the key to extending bearing service life and improving equipment operation stability.