product description
SF-2 type material is a three-layer composite self-lubricating material filled with tetrafluoro-modified polyoxymethylene plastic as the surface layer. It is a benign boundary lubricating material, so it is especially suitable for high-load and low-speed rotary motion and rocking motion. As well as bearings, thrust washers, sliders, ball seats and other friction parts that are often opened and closed under load and are not easy to form hydrodynamic lubrication.
SF-2 can make full use of micro grease, and can be maintained without oil for a long time under the condition of boundary lubrication. Under the condition of complete oil-free lubrication, SF-2 has low friction performance and allowable PV value, so oil storage pits are usually rolled out on the plastic surface, and lithium-based lubricating grease or silicone grease is applied during assembly.
Product Metallography
Metallographic pictures
SF-2 series products can also choose different base materials according to different working conditions, such as: bronze substrate, stainless steel substrate, and formula products such as "lead-free". SF-2Y is an environmentally friendly lead-free product with orange, orange and blue colors.
1.Modified POM
2.Spherical bronze powder
3.steel back
4.Copper/Tin Layer
SF-2 type material has its special wear law and can wear very little in the R stage. After the R stage time, the boundary oil lubrication condition is lost, and the wear begins to increase. If refueled at this time, it can remain without significant wear and its life can be greatly extended. Therefore, the advantage of the SF-2 material is that it needs to be refueled once during the melting R stage, and the interval time R is significantly longer than that of other materials, especially metal materials. about five times.
Application
Pedal assemblies, balance bushings, brake calipers, steering kingpin bushings and truck tailgate bushings, trucks, cranes, truck-mounted cranes, forest machinery, packaging machinery, construction machinery, hydraulic motors, agricultural machinery, mining machinery, metallurgy Machinery, water conservancy machinery, automobile and locomotive, steel rolling industry, etc.
SF-2碳钢基边界自润滑轴承
