SIGMA NJ 312 cylindrical roller bearings
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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
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