SKF bearing washers are required in cases where adjacent machine components cannot serve as raceways.
Available bore sizes for washers in the LS series range from 6 to 160 mm and in the AS series from 4 to 160 mm.
SKF washers in the LS and AS series can be used as a shaft washer (for AXK or AXW series needle roller thrust assemblies) or housing washer (for AXK series needle roller thrust assemblies).
Because of all the possible combinations, the appropriate washers must be ordered separately.
SKF raceway washers, LS series
SKF raceway washers in the LS series are made of carbon chromium (rolling bearing) steel and are hardened. The raceway is ground and the bore and outside diameter are turned. These washers are used for bearing arrangements where accurate centring of the washers is not necessary or where low speeds are involved. The side face with the smaller chamfers is the raceway, and should face the rollers.
SKF thrust washers, AS series
Thrust washers in the AS series are made of spring steel and are 1 mm thick. Both sides of these washers, which are hardened and polished, can be used as raceways. If adjacent machine components are not hardened but have adequate stiffness and the running accuracy requirements are moderate, washers in the AS series can be used to provide a cost-effective bearing arrangement.
SKF shaft and housing washers, WS 811 and GS 811 series
SKF shaft washers in the WS 811 series and housing washers in the GS 811 series are developed primarily for applications with cylindrical roller and cage thrust assemblies, but they can also be combined with needle roller and cage thrust assemblies. These washers, made of carbon chromium bearing steel are hardened and have precision machined raceways. Therefore, SKF recommends using these shaft and housing washers in high-speed applications where accurate centring of the bearing washers is required. WS 811 series shaft washers, which have a ground bore, are available in bore sizes ranging from 15 to 630 mm. When combined with needle roller and cage thrust assemblies, bore sizes up to 160 mm are used. GS 811 series housing washers, which have a ground outside diameter, are available for housing bore diameters ranging from 28 mm to 750 mm. When combined with needle roller and cage thrust assemblies, outside diameter sizes up to 200 mm are used.