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 |
| PDF |
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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 |