Needle roller bearing, thrust cylindrical roller bearing, 812 series
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Product information
| PRODUCT DEFINITION | |
|---|---|
| Brand | NTN |
| d - Bore diameter of support washer IR - WS | 50 mm |
| D - Outside diameter of support washer OR - GS | 78 mm |
| d1 - External diameter of support washer IR - WS | 78 mm |
| D1 - Bore diameter bearing washer OR - GS | 52 mm |
| T - Thrust bearing height | 22 mm |
| Dw - Rolling element diameter | 9 mm |
| Dc1 - Roller cage bore diameter | 50 mm |
| Dc - Roller cage outer diameter | 78 mm |
| rs - Min fillet radius | 1 mm |
| Cage assembly reference | K81210T2 |
| Bearing ring (inner ring) WS | WS81210 |
| Bearing ring (outer ring) GS | GS81210 |
| Ea - Rollers reference outer diameter | 73,1 mm |
| Eb - Rollers reference inner diameter | 53,7 mm |
| Mass | 0,385 kg |
| Cage assembly mass | 0,105 kg |
| Bearing ring (inner ring) WS mass | 0,14 kg |
| Bearing ring (outer ring) GS mass | 0,14 kg |
| PRODUCT PERFORMANCE | |
|---|---|
| Ca - Dynamic axial load rating | 85 kN |
| C0a - Static axial load rating | 238 kN |
| Cua - Limit axial load rating | 29 kN |
| N lim - Grease lubrication limit speed | 950 tr/min |
| N lim - Oil lubrication limit speed | 3800 tr/min |
| Tmin - Min operating temperature | -20 °C |
| Tmax - Max operating temperature | 120 °C |
| ABUTMENT | |
|---|---|
| da min - Min shoulder diameter IR | 73 mm |
| Db max - Max OR shoulder diameter | 54 mm |
| ras max - Max shaft & housing fillet radius | 1 mm |