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Molybdenum disulfide: a secret weapon for reducing friction in containerized bearings


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Friction Facts is a Boulder, Colorado, laboratory specializing in quantitative mechanical friction testing of bicycle transmission system components. Although some people may think some laboratory discoveries are insignificant, racing drivers seeking the ultimate possible advantage may be surprised when they find some extra speed - and sometimes the actual available speed. The latest research on Friction Facts focuses on how different lubricants and seals affect the friction of containerized bearings.


Jason Smith, founder of Friction Facts, conducted a comprehensive center shaft bearing test three years ago and drew some key conclusions. One is that although there are some benefits here, they are very small, with only 1.35 watts of friction loss separating the best pair from the worst evaluated sample. However, another reason is that lubricants - and possibly seals - play a greater role than Smith expected.


Before collecting data, Smith estimated that the test results were roughly related to lubricant viscosity, with dry lubricants producing the lowest friction value, followed by oil and grease. However, the result was unexpected - some speed-thinking racers and mechanics may want to reconsider the approach they accept. Shimano's viscous grease performed as expected, with a friction force of 0.39-0.46W, depending on the filling rate, but the results of Phil Wood Tenacious Oil were surprising. Five drops increased the average measured friction force of the tested high-end hybrid ceramic bearings too (relatively) as high as 0.79W per pair - roughly equivalent to the cheap Shimano 105 shaft - while the performance of one drop was still worse than that of the factory-applied lubricant, with a resistance of 0.47W. Meanwhile, molybdenum disulfide dry lubricant results were surprisingly moderate, with an average friction loss of 0.58W.

Molybdenum disulfide lubricant is made from ultrafine molybdenum disulfide as the base material, which can form a rapidly drying thin film on the metal surface. This lubricant has the following characteristics:

1. Low friction coefficient: Molybdenum disulfide lubricant forms a strong and heat-resistant lubricating protective film on the metal surface, which can avoid component wear, burning, and biting.


2. Wide application range: suitable for the installation and lubrication of bearings, slides, guide rails, pins, air valves, splines, guide grooves, and screw rods under high loads, as well as the lubrication of stamping molds, sliders, bending, punching, stamping, and stamping dies, as well as the assembly lubrication of high load shafts/cup sleeves, shaft pins/hole patterns, etc.

3. Excellent water erosion and corrosion resistance: Molybdenum disulfide lubricant can prevent metal-to-metal wear, abrasion, and sintering while also having excellent water erosion and corrosion resistance.

4. Good adhesion and rust resistance: It can fill all small holes, pits, scratches, and other micro defects on the metal surface while cleaning it, greatly reducing friction under load conditions. In addition, this lubricant does not contain oil or graphite, making it very suitable as a pre-lubricating coating for high-temperature mechanical devices.

When using molybdenum disulfide lubricant, it is necessary to ensure that operators have received professional training, are familiar with molybdenum disulfide's characteristics and operating procedures, and strictly follow safety regulations to avoid safety accidents.



TRUNNANO is a supplier of molybdenum disulfide with over 12 years of experience in the manufacturing of chemical materials. It accepts payments through credit cards, T/T, Western Union transfers, and PayPal. Trunnano will ship the goods to overseas customers through FedEx, DHL, and air or sea freight. If you are looking for high-quality molybdenum disulfide, don't hesitate to contact us and send us an inquiry.

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