ZEN SF689-2RS deep groove ball bearings
Online shopping 37x25x7 Size (mm) ZEN SF689-2RS deep groove ball bearings from a great selection at Store. … 25 Outer Diameter (mm) Accessories.
| Size (mm) | 37x25x7 |
| Bore Diameter (mm) | 37 |
| Outer Diameter (mm) | 25 |
| Width (mm) | 7 |
| d | 25 mm |
| D | 37 mm |
| B | 7 mm |
| d1 | 29.1 mm |
| d2 | 29.1 mm |
| D1 | 33.1 mm |
| r1,2 – min. | 0.3 mm |
| r3,4 – min. | 0.15 mm |
| a | 7.7 mm |
| da – min. | 27 mm |
| db – min. | 27 mm |
| Da – max. | 35 mm |
| Db – max. | 36.2 mm |
| ra – max. | 0.3 mm |
| rb – max. | 0.15 mm |
| dn | 29.5 mm |
| Basic dynamic load rating – C | 4.2 kN |
| Basic static load rating – C0 | 3.2 kN |
| Fatigue load limit – Pu | 0.137 kN |
| Limiting speed for grease lubrication | 45000 r/min |
| Limiting speed for oil lubrication | 70000 mm/min |
| Ball – Dw | 3.175 mm |
| Ball – z | 20 |
| Gref | 0.21 cm3 |
| Calculation factor – f0 | 16.4 |
| Preload class A – GA | 22 N |
| Preload class B – GB | 66 N |
| Preload class C – GC | 132 N |
| Calculation factor – f | 1 |
| Calculation factor – f2A | 1 |
| Calculation factor – f2B | 1.1 |
| Calculation factor – f2C | 1.18 |
| Calculation factor – fHC | 1.02 |
| Preload class A | 29 N/micron |
| Preload class B | 49 N/micron |
| Preload class C | 71 N/micron |
| r1,2 min. | 0.3 mm |
| r3,4 min. | 0.15 mm |
| da min. | 27 mm |
| db min. | 27 mm |
| Da max. | 35 mm |
| Db max. | 36.2 mm |
| ra max. | 0.3 mm |
| rb max. | 0.15 mm |
| Basic dynamic load rating C | 4.16 kN |
| Basic static load rating C0 | 3.2 kN |
| Fatigue load limit Pu | 0.137 kN |
| Attainable speed for grease lubrication | 45000 r/min |
| Attainable speed for oil-air lubrication | 70000 r/min |
| Ball diameter Dw | 3.175 mm |
| Number of balls z | 20 |
| Reference grease quantity Gref | 0.21 cm³ |
| Preload class A GA | 22 N |
| Static axial stiffness, preload class A | 29 N/µm |
| Preload class B GB | 66 N |
| Static axial stiffness, preload class B | 49 N/µm |
| Preload class C GC | 132 N |
| Static axial stiffness, preload class C | 71 N/µm |
| Calculation factor f | 1.11 |
| Calculation factor f1 | 1 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.1 |
| Calculation factor f2C | 1.18 |
| Calculation factor fHC | 1.02 |
| Calculation factor f0 | 16.4 |
| Mass bearing | 0.019 kg |
Detailed Parameters
parameter：
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