KOYO UCT204-12E bearing Size Chart (mm/inches) |
|---|
| Bearing number | 71921 CD/HCP4AL |
| Size (mm) | 145x105x20 |
| Bore Diameter (mm) | 145 |
| Outer Diameter (mm) | 105 |
| Width (mm) | 20 |
| d | 105 mm |
| D | 145 mm |
| B | 20 mm |
| d1 | 117.3 mm |
| d2 | 117.3 mm |
| D1 | 132.7 mm |
| b | 2.3 mm |
| C1 | 10.9 mm |
| C2 | 3.9 mm |
| C3 | 3.2 mm |
| r1,2 - min. | 1.1 mm |
| r3,4 - min. | 0.6 mm |
| a | 26.8 mm |
| da - min. | 111 mm |
| db - min. | 111 mm |
| Da - max. | 139 mm |
| Db - max. | 141 mm |
| ra - max. | 1 mm |
| rb - max. | 0.6 mm |
| dn | 120.6 mm |
| Basic dynamic load rating - C | 61.8 kN |
| Basic static load rating - C0 | 69.5 kN |
| Fatigue load limit - Pu | 2.6 kN |
| Limiting speed for grease lubrication | 10000 r/min |
| Limiting speed for oil lubrication | 16000 mm/min |
| Ball - Dw | 12.7 mm |
| Ball - z | 27 |
| Gref | 11.1 cm3 |
| Calculation factor - f0 | 16.4 |
| Preload class A - GA | 230 N |
| Preload class B - GB | 460 N |
| Preload class C - GC | 920 N |
| Preload class D - GD | 1840 N |
| Calculation factor - f | 1.25 |
| Calculation factor - f | 1 |
| Calculation factor - f2A | 1 |
| Calculation factor - f2B | 1.07 |
| Calculation factor - f2C | 1.12 |
| Calculation factor - f2D | 1.18 |
| Calculation factor - fHC | 1.04 |
| Preload class A | 122 N/micron |
| Preload class B | 168 N/micron |
| Preload class C | 239 N/micron |
| Preload class D | 350 N/micron |
| d1 | 117.3 mm |
| d2 | 117.3 mm |
| D1 | 132.7 mm |
| C1 | 10.9 mm |
| C2 | 3.9 mm |
| C3 | 3.2 mm |
| r1,2 min. | 1.1 mm |
| r3,4 min. | 0.6 mm |
| da min. | 111 mm |
| db min. | 111 mm |
| Da max. | 139 mm |
| Db max. | 141 mm |
| ra max. | 1 mm |
| rb max. | 0.6 mm |
| dn | 120.6 mm |
| Basic dynamic load rating C | 61.8 kN |
| Basic static load rating C0 | 69.5 kN |
| Fatigue load limit Pu | 2.6 kN |
| Attainable speed for grease lubrication | 10000 r/min |
| Attainable speed for oil-air lubrication | 16000 r/min |
| Ball diameter Dw | 12.7 mm |
| Number of balls z | 27 |
| Reference grease quantity Gref | 11.1 cm³ |
| Preload class A GA | 230 N |
| Static axial stiffness, preload class A | 122 N/µm |
| Preload class B GB | 460 N |
| Static axial stiffness, preload class B | 168 N/µm |
| Preload class C GC | 920 N |
| Static axial stiffness, preload class C | 239 N/µm |
| Preload class D GD | 1840 N |
| Static axial stiffness, preload class D | 350 N/µm |
| Calculation factor f | 1.25 |
| Calculation factor f1 | 1 |
| Calculation factor f2A | 1 |
| Calculation factor f2B | 1.07 |
| Calculation factor f2C | 1.12 |
| Calculation factor f2D | 1.18 |
| Calculation factor fHC | 1.04 |
| Calculation factor f0 | 16.4 |
| Mass bearing | 0.7 kg |
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NTK BEARING PRECISION AXLE CORP.2020-07-10 09:46:19
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