product description
SF-1 The metal composite self-lubricating bearing is based on high-quality low-carbon steel, sintered spherical porous copper powder layer in the middle, and the surface is made of PTFE-based wear-resistant lubricating material as the bearing working layer. This material has excellent mechanical bearing capacity. The powder layer can not only transfer the heat generated during the operation of the bearing in time, but also improve the bonding strength between the plastic layer and the substrate.
PTFE is designed for complete dry friction, and a variety of materials have been developed based on lubrication, coefficient of friction and durability requirements. SNNOV's PTFE metal composites provide the best performance over the widest range of loads, speeds and temperatures with or without external lubrication.
Product Metallography
Metallographic pictures
Note: The product can also choose different base materials according to different working conditions, such as: bronze substrate (SF-1B), stainless steel substrate (SF-1S), and lead-free (SF-1W) and other formula products.
1.Teflon
2.Spherical bronze powder
3.steel back
4.Copper/Tin Layer
Wear resistance
SF-1 has excellent wear resistance, which is mainly due to the special molecular structure of PTFE. SF-1 wear can be roughly divided into three stages, and the corresponding friction coefficients also have three situations.
1)"Run-in" stage: The surface layer PTFE mixture transfers to the dual surface to fill the dual surface pits and form a transfer film. At this time, the friction coefficient is larger and the material wears faster. As shown in the curve I in the figure.
2)"Stable" wear stage: The friction after running-in becomes the friction between PTFE, the friction coefficient is low and stable, and the wear rate of the material is low and stable. It is shown in the curve of zone II in the figure.
3)"Sharp" wear phase: The PTFE lubricant in the pores of the porous layer is consumed, and a sufficient amount of lubricant cannot be obtained between the friction interfaces. The lubrication between the friction surfaces is poor, the friction coefficient rises rapidly, and the wear rate of the material is also sharply accelerated. When 70% of the bronze is exposed, the life of JYB-10 is nearly terminated. As shown in the curve III in the figure.
The main factors affecting life expectancy
1) Influence of PV value
PV value is an effective indicator to determine the wear life of SF-1. If life extension is required, the PV value must be reduced.
2) Influence of ambient temperature
The higher the ambient temperature, the shorter the service life of SF-1.
3) The effect of the pair
When the pair is made of alloy steel or hard chrome-plated shaft, and the surface roughness is within the range of Ra=0.4~0.63, the service life of the SF-1 bearing can be significantly improved.
In addition to the standard products shown in the catalogue, non-standard products can also be provided or ordered according to customer requirements.
Application
Agricultural machinery: tractors, combine harvesters, crop sprayers, bulldozers, graders, etc.;
Automotive industry: power steering pump, steering gear thrust pads, disc brakes, shock absorbers, door hinges, wipers, chair angle adjusters, air valves and solenoid valves, etc.;
Office and business machinery: copiers, fax machines, printers, mail processors, etc.;
Hydraulic components and valves: gear pumps, plunger pumps, vane pumps, ball valves, butterfly valves, air cylinders, oil cylinders and other hydraulic components, etc.;
Household appliances: refrigerators, air conditioners, vacuum cleaners, sewing machines, washing machines, microwave ovens and fitness equipment, etc.;
And other logistics machinery, packaging machinery, textile machinery, port machinery, mining machinery, forest machinery and various construction machinery and equipment.
SF-1无油润滑轴承
SF-1T齿轮油泵轴承
SF-1W无铅轴承
SF-1P往复运动轴承
SF-1D液压专用轴承
SF-1B青铜基轴承
SF-1S不锈钢耐腐蚀轴承
