K81228 NTN Bore Diameter 140.000mm Thrust roller bearings
| Dc1 | 140 mm |
| Dc | 200 mm |
| Lw | 19 mm |
| Bearing ring (inner ring) WS | WS81228 |
| Bearing ring (outer ring) GS | GS81228 |
| Ea | 189 mm |
| Eb | 150.1 mm |
| Cage assembly mass | 1.2 kg |
| Ca | 370 kN |
| C0a | 1.280 kN |
| Nlim (grease) | 350 rpm |
| Nlim (oil) | 1.400 rpm |
| Min operating temperature, Tmin | -20 °C |
| Max operating temperature, Tmax | 120 °C |
| Characteristic cage frequency, FTF | 0.5 Hz |
| Characteristic rolling element frequency, BSF | 8.92 Hz |
| Characteristic outer ring frequency, BPF0 | 9 Hz |
| Characteristic inner ring frequency, BPFI | 9 Hz |
| Bearing number | K81228 |
| Brand | NTN |
| Bore Diameter (mm) | 140.000 |
| Outer Diameter (mm) | 200.000 |
| d | 140.000 mm |
| D | 200.000 mm |
| Dw | 19.000 mm |
Detailed Parameters
parameter：
| 62205-2RS C3 Deep groove ball bearings | Brand:PFI ，Outer Diameter :52mm ，Width :18mm ，Bore Diameter :25mm ，Size :25x52x18mm |
| 1639 Deep groove ball bearings | Brand:CYSD ，Outer Diameter :50.8mm ，Bore Diameter :20.638mm ，Size :20.638x50.8x14.288mm |
| GE 050 XES Plain bearings | Bore Diameter :50mm ，Outer Diameter :90mm ，Brand:ISO ，Size :50x90x56mm ，Width :56mm |
| 6002-2RS Deep groove ball bearings | Bore Diameter :15mm ，Brand:ISO ，Size :15x32x9mm ，Outer Diameter :32mm |
| DE0678CS12 Tapered roller bearings | Bore Diameter :30mm ，Outer Diameter :50mm ，Brand:NTN ，d:30 mm ，Width :20mm ，Size :30x50x20mm |
| 30230U Tapered roller bearings | r1s min:3 mm ，e:0.44 ，rs min:4 mm ，Y2:1.38 ，d1:203.5 mm |
| HUB214-9 Angular contact ball bearings | Bore Diameter :23mm ，D:55.5 mm ，d:23 mm ，Outer Diameter :55.5mm ，Brand:NTN |
| EGB2020-E40-B Plain bearings | Brand:INA ，Bore Diameter :20mm ，Width :20mm ，Size :20x23x20mm ，Outer Diameter :23mm |
| B-2812 Needle roller bearings | Bore Diameter :44.45mm ，Size :44.45x53.975x19.05mm ，Outer Diameter :53.975mm ，Brand:NSK |
| CX012 Wheel bearings | Designation SKF:VKBA 663 ，Designation Ruville:5314 ，Brand:CX ，Designation FAG:713644160 ，Designation SNR:R153.14 |
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