SIGMA NJ 312 cylindrical roller bearings
SIGMA NJ 312 cylindrical roller bearings Deal is 40x68x15 Size (mm) your source for OEM and accessories. We sell Genuine at discount prices.
| Size (mm) | 40x68x15 |
| Bore Diameter (mm) | 40 |
| Outer Diameter (mm) | 68 |
| Width (mm) | 15 |
| d | 40 mm |
| D | 68 mm |
| B | 15 mm |
| d1 | 49.7 mm |
| d2 | 47.6 mm |
| D1 | 58.25 mm |
| K | 0.5 mm |
| C1 | 5.03 mm |
| r1,2 – min. | 1 mm |
| r3,4 – min. | 0.6 mm |
| a | 14.8 mm |
| da – min. | 44.6 mm |
| db – min. | 44.6 mm |
| Da – max. | 63.4 mm |
| Db – max. | 63.8 mm |
| ra – max. | 1 mm |
| rb – max. | 0.6 mm |
| dn | 51.6 mm |
| Basic dynamic load rating – C | 12.4 kN |
| Basic static load rating – C0 | 7.6 kN |
| Fatigue load limit – Pu | 0.32 kN |
| Limiting speed for grease lubrication | 36000 r/min |
| Limiting speed for oil lubrication | 56000 mm/min |
| Ball – Dw | 7.144 mm |
| Ball – z | 19 |
| Gref | 2.8 cm3 |
| Calculation factor – f0 | 8.1 |
| Preload class A – GA | 65 N |
| Preload class B – GB | 200 N |
| Preload class C – GC | 390 N |
| Calculation factor – f | 1 |
| Calculation factor – f2A | 1 |
| Calculation factor – f2B | 1.03 |
| Calculation factor – f2C | 1.05 |
| Calculation factor – fHC | 1.01 |
| Preload class A | 38 N/micron |
| Preload class B | 60 N/micron |
| Preload class C | 81 N/micron |
| r1,2 min. | 1 mm |
| r3,4 min. | 0.6 mm |
| da min. | 44.6 mm |
| db min. | 44.6 mm |
| Da max. | 63.4 mm |
| Db max. | 63.8 mm |
| ra max. | 1 mm |
| rb max. | 0.6 mm |
| Basic dynamic load rating C | 12.4 kN |
| Basic static load rating C0 | 7.65 kN |
| Fatigue load limit Pu | 0.32 kN |
| Attainable speed for grease lubrication | 36000 r/min |
| Attainable speed for oil-air lubrication | 56000 r/min |
| Ball diameter Dw | 7.144 mm |
| Number of balls z | 19 |
| Reference grease quantity Gref | 2.8 cm³ |
| Preload class A GA | 65 N |
| Static axial stiffness, preload class A | 38 N/µm |
| Preload class B GB | 200 N |
| Static axial stiffness, preload class B | 60 N/µm |
| Preload class C GC | 390 N |
| Static axial stiffness, preload class C | 81 N/µm |
| Calculation factor f | 1.06 |
| Calculation factor f1 | 1 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.03 |
| Calculation factor f2C | 1.05 |
| Calculation factor fHC | 1.01 |
| Calculation factor f0 | 8.1 |
| Mass bearing | 0.17 kg |
Detailed Parameters
parameter：
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