Barrel Roller Bearings FAG 20317 -MB

The 20317-MB spherical roller bearing from FAG Wälzlager, with dimensions of 85 × 180 × 41 mm, accommodates high radial loads in the event of misalignment.

The 20317 -MB barrel roller bearing is a single-row, angular-contact roller bearing with barrel-shaped rollers, designed for high radial loads. Thanks to the spherical hollow ball raceway in the outer ring, this design automatically compensates for angular misalignment and skewing of the shaft relative to the housing. The open bearing features a robust brass cage and complies with the standard tolerance class P0/PN or ABEC 1. It is suitable for operating conditions in which a rigid mounting would lead to undesirable edge stresses.

In which applications does the 20317 -MB barrel bearing prove its worth?

The 20317 -MB spherical roller bearing is primarily used in heavy-duty bearing arrangements where high radial loads are present and geometric misalignments or shaft deflection need to be compensated for. The spherical inner contour of the outer ring allows the roller set to self-align, thereby preventing edge stresses caused by shaft deflection under operating loads. This protects the raceways from premature wear and ensures even load distribution across the entire length of the rollers. Designs with long shaft centres or flexible housings benefit from this self-aligning capability.

What are the distinctive features of the brass cage in the MB version?

The suffix ‘MB’ denotes a solid brass cage which precisely guides the roller elements and withstands high mechanical stresses and vibrations. Brass possesses favourable sliding properties and contributes to stable running behaviour under shock loads. The specified temperature range is from -30 to +150 degrees Celsius. As this is an unsealed bearing with standard radial clearance, the choice of lubricant and housing seal must be precisely matched to the ambient conditions to prevent lubricant loss.