SF-11 Self-lubricating Bearings

Self-lubricating Bearings Rolling EPB series of high-performance engineering plastic polymer bearings as the base material, through modification of polymer materials technology into high-strength fibers and specialty solid improvement in its internal grease integrated wear resistance; high strength fiber reinforced network structure strength of the material, the composite solid special grease makes EPB series polymer bearings with excellent self-lubricating properties and wear resistance.

Technical ParametersMetallographyApplicationsWearEffect of lifeDownload

Max.load
Static load 250 N/mm²
Low speed 140 N/mm²
Rotating,oscillationg motion 60 N/mm²
Max.PV
Short-time work 3.6 N/mm²*m/s
Continuous work 1.8 N/mm²*m/s
Max.temp -195℃~+280℃
Friction coef. 0.03~0.20
Max.speed
Dry friction 2m/s
Lubrication >2m/s
Thermal conductivity 70W(m*K)-1
Linear cofe. of thermal expansion 11*10-6*K-1
Note: Where the product can also choose a different base materials according to different conditions, such as: bronze substrate (SF-1B), a stainless steel substrate (SF-1S), and lead-free (SF-1W) and other formulations.

Applications

Agricultural equipment: tractors, combine harvesters, crop sprayers, bulldozers, graders, etc;
Automotive industry: power steering pumps, steering gear thrust washer, disc brakes, shock absorbers, door hinges, wiper, recliner chairs, air valve and solenoid valve;
Business office equipment: copiers, fax machines, printers, mail processor and the like;
Hydraulic components and valves: gear pumps, piston pumps, vane pumps, ball valves, butterfly valves, cylinders, fuel tanks and other hydraulic components such as;
Household appliances: refrigerators, air conditioners, vacuum cleaners, sewing machines, washing machines, microwave ovens and fitness equipment;
Logistics and other machinery, packaging machinery, textile machinery, port machinery, mining machinery, forest machinery and all kinds of construction machinery and equipment.

Wear

SF-11 has excellent abrasion resistance, which is mainly due to the special molecular structure of PTFE. SF-11 wear can be divided into three stages, corresponding to the coefficient of friction are also three cases, see right: 1) "running-in" stage: PTFE surface layer of the mixture was transferred to the surface to fill the dual dual surface pits and form a lubricating film, this time, the larger coefficient of friction, wear rate of the material faster. The Ⅰ curve shown.
2) "stability" wear stage: The friction fit after running into friction PTFE between its low and stable friction coefficient, low wear rate material smoothly. Curve shown in Figure Ⅱ area.
3) "sharp" wear stage: PTFE in the pores of the porous layer lubricant consumption, the interface can not be obtained between the friction sufficient amount of lubricant. Poor lubrication between the friction surfaces, a rapid increase in the coefficient of friction, wear rate also dramatically speed up until 70% bronze bare, SF-11 closer to terminate life. As shown in the graph shown Ⅲ

Effect of life

1) Effect of PV value
PV value is to determine the effective index SF-11 wear life.
2) Influence of ambient temperature
The higher the ambient temperature, the shorter the life of SF-11.
3) Effect of dual member
Dual use items or hard chrome plated steel shaft, surface roughness Ra = within the range of 0.4 to 0.63, SF-11 bearing life can be significantly improved.

In addition to the standard product catalog is displayed, it can also provide non-standard product or to order according to customer requirements.

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