SF-1 Self-lubricating Bearings

SF-1 Self-lubricating Bearings SF-1 self-lubricating metal composite materials to high-quality low-carbon steel substrate, sintered porous spherical copper powder layer, the surface rolled to the PTFE-based material as a wear-resistant lubricating the bearing layer, this material has excellent mechanical load carrying capacity intermediate copper layer can not only timely transfer of heat generated in the bearing during operation, but also improves the bonding strength of the plastic layer and the substrate.

Introduction

SF-1 self-lubricating metal composite materials to high-quality low-carbon steel substrate, sintered porous spherical copper powder layer, the surface rolled to the PTFE-based material as a wear-resistant lubricating the bearing layer, this material has excellent mechanical load carrying capacity intermediate copper layer can not only timely transfer of heat generated in the bearing during operation, but also improves the bonding strength of the plastic layer and the substrate. PTFE designed for completely dry friction state, and according to lubrication, friction coefficient and durability requirements to develop a variety of materials. Terios metal of PTFE composites under external lubrication or non-lubricated, can provide the best performance in the widest range of load, speed and temperature range.

Metallographic Picture

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.

1.PTFE with lead
2.Porous bronze
3.Steel backing
4.Tin-plating

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, etc;
Household appliances: refrigerators, air conditioners, vacuum cleaners, sewing machines, washing machines, microwave ovens and fitness equipment;
And other logistics machinery, packaging machinery, textile machinery, port machinery, mining machinery, forest machinery and all kinds of construction machinery and equipment.

Chemical Properties

SF-2 polymer surface chemical resistant, so it depends on the corrosion resistance of steel back and look plating. The back surface of the steel or tin-plated copper, can effectively prevent atmospheric corrosion; if operating in corrosive media, etc. galvanized steel back can.

Wear

SF-1 has excellent wear resistance, which is mainly due to the special molecular structure of PTFE. SF-1 wear can be divided into three stages, the corresponding coefficient of friction there are three cases, see the 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 in FIG.
2) "stability" wear stage: The running-into frictional friction PTFE between its low and stable friction coefficient, low wear rate material smoothly. Curve shown in Figure Ⅱ area.
3) "sharp" wear stage: the porous layer, the pores of the PTFE 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 has accelerated dramatically, until 70% of the bronze bare, SF-1 closer to terminate life. Ⅲ curve as shown in FIG.

The Main Factors Affecting Life

1) Effect of PV value
PV value is to determine the effective index SF-1 wear life. If you require longer life, PV values must be reduced.
2) Influence of ambient temperature
The higher the ambient temperature, the shorter the life of SF-1.
3) Effect of dual member
Duality pieces of alloy steel or hard chromium plated shafts, surface roughness Ra = within the range of 0.4 to 0.63, SF-1 bearing life can be significantly improved.
In addition to the standard products shown in the catalog, you can also provide non-standard products or order according to customer requirements.