Self Lubricating Plain Bearing is a self-lubricating multi layer bearing consisting of tin-coated steel, a middle layer of sintered bronze and an inner layer, sliding surface, of PTFE. The bearing is mainly suitable for rotating and oscillating movements and applications with frequent starts and stops. The friction value is very low which enables SF-1 bearings to be used without lubrication. The bearings can also be used in oil or water since the bearings are highly corrosion resistant.
Assembly of Self Lubricating Plain Bearing
Self Lubricating Plain Bearing is not to be worked on (no bore or grinding). Nor on the inside or the outside diameter. They are already prepared for assembly.
Self Lubricating Plain Bearing is so designed that when press-fitting the bearing into the housing, the mating gap can be eliminated.
The mating-point of the bearing should be positioned away from the load-zone. Press-fit the bearing straight and concentrically into the housing, carefully and slowly, using a press or a vise, making sure that no damage is done to the inner surface of the bearing.
If a bore is made, always operate from the sliding surface towards the steel surface.
This is to prevent the three layers from dividing.
Cutting or sticking Always cut or stick the sliding plate (sheets or washers) from the sliding surface towards the steel surface. Bearing are to be cut from the inside towards the outside. This is to prevent the three layers from dividing. Therefore always start from the soft layer towards the harder layer. It also helps You to keep any burrs in the right direction (not towards the sliding surface).
Lubrication / Self Lubricating Plain Bearing (wrapped bushing with PTFE sliding surface) Bearings, washers or sheets of the brand SF-1 are under no circumstances to be lubricated with grease containing MoS2 (molybden disulfide, normal component in universal greases). MoS2 will create a chemical reaction causing the PTFE-layer to melt.
Self Lubricating Plain Bearing is to be run dry. If, however, grease is used, we recommend a so called “white grease”. E.g. a lithium-based grease with additives from a “whitener”, e.g. calcium hydroxide, zinc monoxide, zinc peroxide etc.
Specialmanufacturing Upon request, we can offer inch-sizes, special lengths, bearings acc. to drawing and various PTFE-layers for different areas of use as well as different backings in bronze or stainless steel etc.