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71956ACD/HCP4A super precision angular contact ball bearing specification
| Designation | 71956-ACD/HCP4A | |
| Category | ||
| Angular contact ball bearing, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 280 mm | 11.024 in |
| D (Outer diameter) | 380 mm | 14.961 in |
| B (Width) | 46 mm | 1.811 in |
| W (Weight) | 11.1 kg | 24.4 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 276 | |
| C0r (kN) Basic static load rating | 430 | |
| Fatigue load limit (kN) | 7.35 | |
| Attainable speed for grease lubrication (r/min) | 3200 | |
| Attainable speed for oil-air lubrication (r/min) | 5000 | |
| Contact angle | 25 ° | |
| Ball diameter (mm) | 30.162 mm | |
| Number of balls | 31 | |
| Reference grease quantity | 159 cm3 | |
| Seal | No | |
| Precision | P4A | |
Extended 71956.ACD.HCP4A angular contact ball bearing 280*380*46 mm
| Designation | Principal dimensions | Basic load ratings | Attainable speeds | ||||
| dynamic | static | Grease lubrication | Oil-air lubrication | ||||
| d[mm] | D[mm] | B[mm] | C[kN] | C0[kN] | [r/min] | [r/min] | |
| 71956 ACD/HCP4A | 280 | 380 | 46 | 276 | 430 | 3 200 | 5 000 |
| 71956 ACD/P4A | 280 | 380 | 46 | 276 | 430 | 2 600 | 4 000 |
| 71956 CD/HCP4A | 280 | 380 | 46 | 291 | 455 | 3 600 | 5 600 |
| 71956 CD/P4A | 280 | 380 | 46 | 291 | 455 | 3 000 | 4 500 |
| 71960 ACDMA/HCP4A | 300 | 420 | 56 | 351 | 560 | 3 000 | 4 500 |
| 71960 ACDMA/P4A | 300 | 420 | 56 | 351 | 560 | 2 400 | 3 800 |
| 71960 CDMA/HCP4A | 300 | 420 | 56 | 371 | 600 | 3 200 | 5 000 |
| 71960 CDMA/P4A | 300 | 420 | 56 | 371 | 600 | 2 800 | 4 300 |
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