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What Does Self-Lubrication Mean?

From Polygon Company
 

 
Q: "What Does Self-Lubrication Mean? A: For Polygon's PolyLube™ fiber-series self-lubricating bearing, a proprietary form of PTFE is used. In the form PTFE is used in the PolyLube™ fiber series bearings, lubrication occurs via the film transfer process. As the shaft rotates under normal cycling conditions, the PTFE is sheared and compacted in the surface texture of the shaft. This happens because the PTFE molecular "strands" are very stringy and as a result can fill the macroscopic voids in the shaft. Since PTFE has a melting temperature of 612°F, a "smearing" action of the PTFE around the shaft and the bearing wear surface can take place. This transition temperature (the temperature at which physical-not mechanical- performance changes take place) is high enough to allow high surface operating temperatures under dry conditions. Due to the high thermal expansion of PTFE, it is "drawn" out of the wear liner and repeatedly smeared and re-smeared during bearing rotation or oscillation.
Products & Services
Plain bearings and sleeve bearings (also referred to as bushings or journal bearings) are used to constrain, guide or reduce friction in rotary or linear applications. They function via a sliding action. Search by Specification | Learn more about Plain Bearings and Sleeve Bearings
Product Announcements
Polygon Company - PolyLube™ Fiber Series Bearing
PolyLube Fiber Series bearings are the bearing of choice in highly loaded bearing joints where a life cycle of over 500,000 cycles is desired. Testing has shown this bushing has wear under 0.006"... (read more)
Polygon Company - POLYLUBE® Guide Rod Bushings
POLYLUBE® Composite Guide Rod Bushings are designed as straight-forward replacements for traditional metallic guide rod bushing materials. (read more)
Polygon Company - POLYLUBE® Glass Tape Bushing
Best for applications where corrosion, high misalignment or edge loading, low friction and excellent wear characteristics are desired. Great for use as guide rod bearings, with linear motion... (read more)
Polygon Company - POLYLUBE® High Temperature Bushings
A bushing designed for environments over 450°F or where thermal expansion stability is critical. POLYLUBE® HT bushing is a high load, low RPM bushing designed for applications where self-lubrication... (read more)
Daemar Inc. - DMR™ Fiber-Lube™
A Series of composite bushings that allow true self lubrication. Ideal for long-term highly loaded applications. Additional benefits include: low friction values and resistance to corrosion. The... (read more)
Polygon Company - Custom bushings and bearings
Polygon Company is a vertically integrated self-lubricated bearing company. We design and produce our own proprietary liners, as well as resin formulations. We can also engineer special fiber... (read more)
Welker Engineered Products - Bonded gibs, wear plates and bearings
Welker Engineered Products manufacturers self-lubricating, bonded construction gibs, wear plates and bearings. Steel gibs, plates or bearings are bonded with filled PTFE to a metal substrate,... (read more)
RBC Bearings - FIBERGLIDE® Self-Lubricating Bearings
FIBERGLIDE® bearings are completely selflubricating and normally run dry. They are unique in their ability to resist cold flow under extremely high loads... (read more)
Topics of Interest
Q: "How Do PolyLube™ Bearings Compare To Spring Style Steel Bushings?" A: When comparing PolyLube Fiber & MRP bearings to hardened spring bushings, four primary design improvements for the... (Read More)
Contamination is one of the most common causes for the failure of journal bearings. Metal bearings combat this problem with the use of grease zirks and maintenance schedules that are imposed on the... (Read More)
Q: "How Do Self-Lubricating Composite Bearings Compare To Other Bearing Materials?" A: The Polygon PolyLube™ bearing can be used as a replacement for traditional powdered metal bearings where... (Read More)
Q: "Is Moisture Absorption A Problem With Composite Bearings?" A: A common misconception with composite bearings is that they are prone to moisture absorption. This can be of special concern for... (Read More)
When considering a PolyLube™ greaseless bearing system, it is important to identify design details that will not allow for a fair test. The features to consider are associated with the grooves,... (Read More)
See more product announcements for Plain Bearings and Sleeve Bearings
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