Low Price SF-2 Marginal Lubrication Bearings
SF-2 is triple-layer marginal self lubricating material that can fill modified POM plastic as sueface layer; it is benignant boundary lubrication material. Therefore, it is particularly applicable high-load low-spead rotating and wing movement, as well as in the condition that frequent loaded start-stop is the requirement while hydrodynamic lubrication membrane is difficult to form, in the parts such as bearing, thrust washer, sliding block, ball socket and so on. SF-2 can take full advantage of less grease to work long time without lubrication maintenance under boundary lubrication condition. But under oil-free condition, SF-2 the frictional behavior and permissible PV values is relatively low, so generally storage pit can be formed on the plastic surface, where lithiumbased lubricant grease or silicone grease and so on should be applied when being installed.
SF-2 material follows special wearing rules, when SF-2 bush is installed with application of grease such as lithium-based or silicone grease, its service life varies from the PV value under working condition.For instance, when PV value is about 2.5MPam/s, its service life will be about 200hr; when PV value is 0.1MPam/s, its service life can be above 10000hr.The cycle of lubrication maintenance of SF-2 bush is about the half its service life. For instance, when PV=25MPam/s, it is required to be oil-lubricated every 100hr.
According to the different working conditions and environmental protection, the POM or PEEK layer with different polymer filler,surface tin or copper plating.Product range includes SF-2(black)、SF-2Y(yellow)、SF-2S（orange）、SF-2L（blue）、SF-2P(PEEK).