Tech Talk Blog

Moly filled cast nylon bearings have been used very successfully for many years. The known drawbacks of nylon has always been it’s inherent tendancy to absorb moisture over time and thus causing swelling of the material. More than that, the constant absorption and drying cycle leads to fatigue failure over time. The CJ bearing has zero absorption in moisture, is stronger in terms of compressive strength and resistance to deformation, has a thermal expansion rate the same as steel and has a very low friction. Since the CJ requires no lubrication, it is as close to maintenance free as you can get. In independant testing it was shown that wear life of the CJ is significantly better as well. In rotary wear tests we found that the Nylon/MOS2 had a weight loss of over 180mg after 50 hours. The CJ had 100.5 mg of loss in the same test. Load for the test was 2000 psi at 25 sfpm and temperatures and humidity were controlled in the lab at 78F and 50% humidity. For more information on the CJ Bearing products visit www.tstar.com and check out the Video Library and our on line catalog.

Composite self lubricating bearings take advantage of superior strength from filament or laminate wound structure. Add to that a variety of lubricating media like PTFE, MOS2, Graphite and combine with abrasion resistant, high strength woven liners and you have the makings of super bearings! Composite bearings are primarily applied to high load, low speed applications however new liner materials allow for speeds up to 500 feet per minute without lubrication. Another unique quality of composite bearings is they love to be under water. Excellent materials for marine applications under water, deck side and dock side.

Check out some stories in our Shooting Star Archives and look on www.tstar.com for more information!