Simplicity ® Plain Bearing Product Overview
Linear Plain and Ball Bearings
0%
100%
Plain Bearing Only
Good engineering principles dictate that the best bearing design be utilized for any given bearing application. Each type of bearing has advantages and disadvantages. Strengths or limitations can make it a clear choice depending on the application environment. At other times, an engineer will have a choice because multiple types of bearings can meet the need. In 1983, PBC Linear ® created the self-lubricating Simplicity linear bearing – a technology that solves problems in dirt, vibration, shock loading, cleanrooms, welding, foundry, and washdown situations where linear ball bearings regularly fail. Today, PBC Linear provides a full range of linear motion solutions for both plain bearing and ball bearing applications – giving engineers the versatility to choose the right bearing for the application. Chart to the right here is intended to help guide in that decision making process.
Plain or Ball
Ball Bearing Only
100%
0%
Ball Bearing Better performance for moment loading Balls provide precise, low-friction performance – but are susceptible to contamination
Simplicity Plain Bearing Fines embed in Frelon ® liner
eliminating shaft damage Wiping action cleans shaft
Frelon liner is self lubricating Additional lubrication is optional
Bearing Type
Load
Moment Loads
Linear Speed
Coefficient Of Friction
Precision
Environment
Plain
Limited due to 2:1 ratio
Up to 300 sfm (1.524 m/sec) dry running Up to 825 sfm (4.19 m/sec) with lubrication
FrelonGOLD ® = 0.125 Consistent over life and in a variety of environments
Excels in contaminated, wet, dry, and clean room applications
Precision running clearance = 0.0005" (0.0127 mm) per side
Up to 20x ball bearings
Link to 2:1 Ratio
Ball
Average = 0.05 Can change dramatically dependent on environmental conditions
Moderate to good High moment loads can cause increased wear and shorten bearing life
Can be preloaded, virtually eliminating play This can shorten life
Up to 3 m/sec (590 sfm) Always requires lubrication
Will corrode and fail in contamination
Limited due to point-to-point contact of balls to shaft
pbclinear.com • Engineering Your Linear Motion Solutions 7
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