NSK NJ321EM Roller Bearings
| Bearing number: | 4T-78250/78551 |
| Size (mm): | 63.5x140.03x36.512 |
| Bore Diameter (mm): | 63,5 |
| Outer Diameter (mm): | 140,03 |
| Width (mm): | 36,512 |
| d: | 63,5 mm |
| D: | 140,03 mm |
| T: | 36,512 mm |
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Product Details
| Bearing number | 4T-78250/78551 |
| Size (mm) | 63.5x140.03x36.512 |
| Bore Diameter (mm) | 63,5 |
| Outer Diameter (mm) | 140,03 |
| Width (mm) | 36,512 |
| d | 63,5 mm |
| D | 140,03 mm |
| T | 36,512 mm |
| B | 33,236 mm |
| C | 23,52 mm |
| ra1 max. | 2,3 mm |
| a - | 8,5 mm |
| Da | 117 mm |
| db | 79 mm |
| ra max. | 2,3 mm |
| da | 85 mm |
| Db | 132 mm |
| Weight | 2,54 Kg |
| Basic dynamic load rating (C) | 171 kN |
| Basic static load rating (C0) | 212 kN |
| (Grease) Lubrication Speed | 2 600 r/min |
| (Oil) Lubrication Speed | 3 400 r/min |
| Calculation factor (e) | 0,87 |
| Calculation factor (Y0) | 0,38 |
| d1 | 103.5 mm |
| a | 45.01 mm |
| e | 0.87 |
| Y2 | 0.69 |
| Y0 | 0.38 |
| Mass | 2.54 kg |
| Dynamic load, C | 171 kN |
| Rating life coefficient, A2 | 1.4 |
| Static load, C0 | 212 kN |
| Fatigue limit load, Cu | 25.9 kN |
| Nlim (oil) | 3,400 rpm |
| Nlim (grease) | 2,600 rpm |
| Min operating temperature, Tmin | -40 °C |
| Max operating temperature, Tmax | 120 °C |
| Characteristic cage frequency, FTF | 0.43 Hz |
| Characteristic rolling element frequency, BSF | 5.89 Hz |
| Characteristic outer ring frequency, BPF0 | 7.28 Hz |
| Characteristic inner ring frequency, BPFI | 9.72 Hz |
| ra max | 2.3 mm |
| r1a max | 2.3 mm |
| Category | Bearings |
| Inventory | 0.0 |
| Minimum Buy Quantity | N/A |
| Weight / Kilogram | 2.566 |
| Product Group | B04334 |
Company Profile
| Worktime |
9.00--18.00 |
| Phone |
0065-31591338 |
| Fax |
0065-31591338 |
