BC2-0300 Double-row Cylindrical Roller Bearing

Product Introduction

BC2-0300 is a heavy-duty double-row cylindrical roller bearing purpose-built for railway traction motor and gearbox applications. Manufactured from premium through-hardened chrome bearing steel (GCr15), this bearing incorporates two rows of precision-ground cylindrical rollers with optimized rib contact geometry, delivering exceptional radial load-carrying capacity and high structural rigidity under the severe alternating loads encountered in electric and diesel-electric locomotive drive systems.

The bearing features a separable inner ring, outer ring, and roller-cage assembly, enabling straightforward mounting, dismounting, and periodic inspection — a critical requirement for railway maintenance operations where minimal downtime is essential. The cage is typically machined from high-strength brass or glass-fiber-reinforced polyamide, ensuring reliable roller guidance, reduced frictional heat, and consistent performance at sustained high rotational speeds.

BC2-0300 is commonly configured as a non-locating (floating) bearing in traction motor assemblies, accommodating axial shaft displacement caused by thermal expansion while maintaining precise radial support. Its robust internal design withstands shock loads, vibration, and variable-speed operation characteristic of mainline locomotives, metro vehicles, and light rail transit systems.

Key Features

• Double-row cylindrical roller design for ultra-high radial load capacity

• Fully separable inner ring, outer ring, and roller-cage assembly for easy maintenance

• Premium chrome bearing steel with precise through-hardening heat treatment

• Machined brass or polyamide cage for reliable high-speed operation

• Optimized rib contact geometry for low friction, reduced heat generation, and extended service life

• Suitable as a non-locating bearing, accommodating thermal expansion of the motor shaft

• High resistance to shock loads and vibration in railway operating environments

Application

Widely deployed in railway electric traction motors, diesel-electric locomotive motor suspensions, metro and light rail vehicle drive motors, locomotive gearbox input shafts, and other heavy-duty rotating machinery requiring high radial load support with axial displacement compensation.