Page 5 of RBC Roller Brochure by RBC Bearings

needle roller cam follower previous generation design and performance long small diameter needle rollers mean lower load capacity limited speed and higher operating temperatures the combination of minimal grease charge volume and more rapid lubricant degradation mean that relubrication is required for even moderate service life the seals act as thrust washers and provide outer ring guidance needle roller cam follower single row needle rollers gap seals these seals are designed to fill the gap between outer ring shoulder and the end ring see above illustration this results in substantial frictional and thrust loads on seal surfaces that can lead to rapid wear larger number of small diameter rollers result in lower load rating and reduced fatigue life limited roller guidance end-guided needle rollers tend to skew during normal operation this can result in excessive heat generation which can lead to deterioration of the already limited grease supply minimal grease retention volume the only available area for grease charge is between the rollers cam follower life is directly related to effective lubrication relubrication of needle roller cam followers is required to maximize life www.rbcbearings.com 800.390.3300 5

[close]