NJ238EM TIMKEN Tapered Roller Bearings Double-row
| Brand Name: | TIMKEN |
| Model Number: | NJ238EM |
| Bearing number: | 4T-6277/6220 |
| Size (mm): | 44.45x127x50.8 |
| Bore Diameter (mm): | 44,45 |
| Outer Diameter (mm): | 127 |
| Width (mm): | 50,8 |
| d: | 44,45 mm |
| D: | 127 mm |
| T: | 50,8 mm |
Product Details
| Bearing number | 4T-6277/6220 |
| Size (mm) | 44.45x127x50.8 |
| Bore Diameter (mm) | 44,45 |
| Outer Diameter (mm) | 127 |
| Width (mm) | 50,8 |
| d | 44,45 mm |
| D | 127 mm |
| T | 50,8 mm |
| B | 52,388 mm |
| C | 41,275 mm |
| ra1 max. | 3,3 mm |
| a | 19,5 mm |
| Da | 108 mm |
| db | 60 mm |
| ra max. | 3,5 mm |
| da | 67 mm |
| Db | 117 mm |
| Weight | 3,58 Kg |
| Basic dynamic load rating (C) | 250 kN |
| Basic static load rating (C0) | 320 kN |
| (Grease) Lubrication Speed | 3 200 r/min |
| (Oil) Lubrication Speed | 4 300 r/min |
| Calculation factor (e) | 0,3 |
| Calculation factor (Y0) | 1,11 |
| d1 | 88 mm |
| e | 0.3 |
| Y2 | 2.01 |
| Y0 | 1.11 |
| Mass | 3.58 kg |
| Dynamic load, C | 250 kN |
| Rating life coefficient, A2 | 1.4 |
| Static load, C0 | 320 kN |
| Fatigue limit load, Cu | 39 kN |
| Nlim (oil) | 4,300 rpm |
| Nlim (grease) | 3,200 rpm |
| Min operating temperature, Tmin | -40 °C |
| Max operating temperature, Tmax | 120 °C |
| Characteristic cage frequency, FTF | 0.41 Hz |
| Characteristic rolling element frequency, BSF | 5.08 Hz |
| Characteristic outer ring frequency, BPF0 | 5.7 Hz |
| Characteristic inner ring frequency, BPFI | 8.3 Hz |
| ra max | 3.5 mm |
| r1a max | 3.3 mm |
