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71801ACD/HCP4 super precision angular contact ball bearing specification
| Designation | 71801 ACD/HCP4 | |
| Category | ||
| Angular contact ball bearing, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 12 mm | 0.472 in |
| D (Outer diameter) | 21 mm | 0.827 in |
| B (Width) | 5 mm | 0.197 in |
| W (Weight) | 0.006 kg | 0.013 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 1.95 | |
| C0r (kN) Basic static load rating | 1.12 | |
| Fatigue load limit (kN) | 0.034 kN | |
| Attainable speed for grease lubrication (r/min) | 75 000 | |
| Attainable speed for oil-air lubrication (r/min) | 110 000 | |
| Contact angle | 25 ° | |
| Ball diameter (mm) | 2.381 mm | |
| Number of balls | 14 | |
| Reference grease quantity (cm) | 0.07 cm | |
| Seal | No | |
About 71801-ACD/HCP4 bearing 12*21*5 mm
| Category | Angular contact ball Bearing, SP |
| Features and benefits | 1. high precision running accuracy 2. high-speed running capacity 3. high rigidity and very robust 4. low noise, vibration and heat generation and minimum maintenance needed |
| Application | Metal cutting and woodworking machinery spindles Other machine spindles (e.g. balancing machines) |
Extended 71801.ACD.HCP4 angular contact ball bearings 12 *21*5
| Designation | Principal dimensions | Basic load ratings | Attainable speeds | ||||
| dynamic | static | Grease lubrication | Oil-air lubrication | ||||
| d[in] | D[in] | B[in] | C[lbf] | C0[lbf] | [r/min] | [r/min] | |
| 71801 ACD/P4 | 0.472 | 0.827 | 0.197 | 438 | 252 | 63 000 | 95 000 |
| 71801 ACD/HCP4 | 0.472 | 0.827 | 0.197 | 438 | 252 | 75 000 | 110 000 |
| 71801 CD/P4 | 0.472 | 0.827 | 0.197 | 468 | 265 | 70 000 | 110 000 |
| 71801 CD/HCP4 | 0.472 | 0.827 | 0.197 | 468 | 265 | 85 000 | 130 000 |
| 71901 ACE/P4A | 0.472 | 0.945 | 0.236 | 456 | 191 | 83 000 | 123 000 |
| 71901 ACE/HCP4A | 0.472 | 0.945 | 0.236 | 456 | 191 | 98 000 | 150 000 |
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