 NTN NK42/20R needle roller bearings
  NTN NK42/20R needle roller bearings
                                
With over 10170 full-service stores, 12 mm B our NTN NK42/20R needle roller bearings inventory is extensive and our parts are 50 mm d priced right. within 24 hours. This helps 72 mm D you maximize your productivity by saving time and your hard-earned dollars.
| d | 50 mm | 
| D | 72 mm | 
| B | 12 mm | 
| d1 | 57.1 mm | 
| d2 | 57.1 mm | 
| D2 | 67.12 mm | 
| r1,2 min. | 0.6 mm | 
| r3,4 min. | 0.3 mm | 
| a | 20.3 mm | 
| da min. | 53.2 mm | 
| da max. | 56.6 mm | 
| db min. | 53.2 mm | 
| db max. | 56.6 mm | 
| Da max. | 68.8 mm | 
| Db max. | 70.6 mm | 
| ra max. | 0.6 mm | 
| rb max. | 0.3 mm | 
| Basic dynamic load rating C | 12.7 kN | 
| Basic static load rating C0 | 9.8 kN | 
| Fatigue load limit Pu | 0.415 kN | 
| Attainable speed for grease lubrication | 16000 r/min | 
| Ball diameter Dw | 6.35 mm | 
| Number of balls z | 25 | 
| Preload class A GA | 80 N | 
| Static axial stiffness, preload class A | 105 N/µm | 
| Preload class B GB | 160 N | 
| Static axial stiffness, preload class B | 137 N/µm | 
| Preload class C GC | 320 N | 
| Static axial stiffness, preload class C | 180 N/µm | 
| Preload class D GD | 640 N | 
| Static axial stiffness, preload class D | 240 N/µm | 
| Calculation factor f | 1.13 | 
| Calculation factor f1 | 0.98 | 
| Calculation factor f2A | 1 | 
| Calculation factor f2B | 1.04 | 
| Calculation factor f2C | 1.08 | 
| Calculation factor f2D | 1.14 | 
| Calculation factor fHC | 1 | 
| Calculation factor e | 0.68 | 
| Calculation factor (single, tandem) Y2 | 0.87 | 
| Calculation factor (back-to-back, face-to-face) Y1 | 0.92 | 
| Calculation factor (back-to-back, face-to-face) Y2 | 1.41 | 
| Mass bearing | 0.14 kg | 
 Detailed  Parameters
  Detailed  Parameters
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  parameter:
                                        
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