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728ACD/P4A super precision angular contact ball bearing specification
| Designation | 728-ACD/P4A | |
| Category | ||
| Angular contact ball bearing, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 8 mm | 0.315 in |
| D (Outer diameter) | 24 mm | 0.945 in |
| B (Width) | 8 mm | 0.315 in |
| W (Weight) | 0.017 kg | 0.037 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 3.58 | |
| C0r (kN) Basic static load rating | 1.34 | |
| Fatigue load limit | 0.057 kN | |
| Attainable speed for grease lubrication | 67 000 r/min | |
| Attainable speed for oil-air lubrication | 100 000 r/min | |
| Contact angle | 25 ° | |
| Ball diameter | 4.762 mm | |
| Number of balls | 8 | |
| Reference grease quantity | 0.228 cm3 | |
Extended 728.ACD.P4A angular contact ball bearings
| 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] | |
| 728 ACD/P4A | 8 | 24 | 8 | 3.58 | 1.34 | 67 000 | 100 000 |
| 728 ACD/HCP4A | 8 | 24 | 8 | 3.58 | 1.34 | 75 000 | 120 000 |
| 728 CD/P4A | 8 | 24 | 8 | 3.71 | 1.37 | 70 000 | 110 000 |
| 728 CD/HCP4A | 8 | 24 | 8 | 3.71 | 1.37 | 85 000 | 130 000 |
| 719/9 ACE/P4A | 9 | 20 | 6 | 1.95 | 0.735 | 100 000 | 150 000 |
| 719/9 ACE/HCP4A | 9 | 20 | 6 | 1.95 | 0.735 | 120 000 | 180 000 |
| 719/9 ACE/P4AH | 9 | 20 | 6 | 1.95 | 0.765 | 100 000 | 150 000 |
| 719/9 ACE/HCP4AH | 9 | 20 | 6 | 1.95 | 0.765 | 120 000 | 180 000 |
| 719/9 CE/P4A | 9 | 20 | 6 | 1.99 | 0.765 | 109 000 | 165 000 |
| 719/9 CE/HCP4A | 9 | 20 | 6 | 1.99 | 0.765 | 133 000 | 200 000 |
| 719/9 CE/P4AH | 9 | 20 | 6 | 2.03 | 0.8 | 109 000 | 165 000 |
| 719/9 CE/HCP4AH | 9 | 20 | 6 | 2.03 | 0.8 | 133 000 | 200 000 |
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