Ball and Needle Bearing Friction Correlations Under Radial Load Conditions

Richard J. Trippett

doi:10.4271/851512

1985-09-01

Ball and Needle Bearing Friction Correlations Under Radial Load Conditions 851512

Experimental friction data for Conrad ball bearings and caged needle bearings rarely appear in the open literature. However, accurate bearing friction estimates are important in identifying the efficiencies of rotating equipment. Analytical friction models for these bearing types are complex, and, if available, reside with the bearing manufacturer. Needle bearings are perceived to have lower friction than ball bearings for the same shaft diameter, although no experimental data were found to substantiate this claim.

To obtain accurate bearing friction values for candidate bearings, a series of friction measurements under different radial load and lubricant conditions was made. From these tests, two new friction correlation equations were developed for radial load and oil-jet lubrication conditions of Conrad ball bearing and caged needle bearings.

These correlation equations provide a guide for the engineer interested in the effect of certain bearing parameter changes on bearing friction.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Ball and Needle Bearing Friction Correlations Under Radial Load Conditions 851512

SAE MOBILUS