Cylindrical roller skf bearing part suffix code description: s1 After dimensional stabilization, it can be used for bearing rings up to 200 degrees Celsius s2 After dimensional stabilization, it can be used for bearing rings up to 250 degrees Celsius tn9 Injection-molded glass fiber Reinforced nylon 66 cage va301 Bearings for railway vehicle tractors va305 va301 + special inspection procedures va3091 va301 + vl0241 va350 bearings for railway axle boxes , for applications in severely polluted environments vl0241 alumina coating on the outer surface of the outer ring, resistant to DC up to 1000 volts vl2071 alumina coating on the outer surface of the inner ring, resistant to DC voltage up to 1000 volts vq015 with crowned raceway the inner ring, allowing for increased misalignment d modified internal design ec optimized internal design including more and/or larger rollers and modified roller/end flange contacts ha3 case hardened inner ring hb1 bezier Body hardened inner and outer rings hn1 Inner and outer rings with special surface heat treatment j Stamped steel cage with roller centering, unhardened k taper bore, taper 1:12m Two-component machined copper cage to Roller centering ma double-component machined copper cage, the outer ring centering mas is the same as ma, but there is a lubrication groove on the guide surface mb double-component machined copper cage, the inner ring centering mbs is the same as mb, but on the guide surface There are lubricating grooves ml integrally formed window-type copper cage, inner or outer ring centering mp integral window-type copper cage, with milling, twisting or broaching grooves, inner or outer ring centering mps and mp The same, but there are lubricating grooves on the guide surface mr integrally formed window-type copper cage, with roller centering n outer ring outer diameter with snap ring groove nr outer ring with snap ring groove, with snap ring n1 One outer ring side with a positioning groove n2 One outer ring side with two positioning grooves spaced 180 degrees p injection molding glass fiber reinforced nylon 66 cage, with roller centering ph injection molding polyetherester ketone (peek) cage , with roller centering pha injection molding polyetheresterketone (peek) cage, outer ring centering
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