71801 ACD/HCP4 Angular Contact Ball Bearing 12*21*5 Mm
71801 ACD/HCP4
Bore Diameter:12 mm
Outside Diameter:21 mm
Width:5 mm
Weight:0.006 kg
The 71801 ACD/HCP4 bearing is a Super Precision bearings with an inner diameter of 12 mm , an outer diameter of 21 mm, a width of 5 mm. It typically uses P4 grade precision tolerances and It primarily bears Radial and Axial, Its dynamic radial rated load is approximately 1.95, its static radial rated load is approximately 1.12. Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Application: Metal cutting and woodworking machinery spindles Other machine spindles (e.g. balancing machines)
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Detailed description
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 Basic dynamic load rating | 1.95 kN | |
| C0r Basic static load rating | 1.12 kN | |
| 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 | Yes | |
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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