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71909ACB/HCP4AL super precision angular contact ball bearing specification:
| Designation | 71909 ACB/HCP4AL | |
| Category | ||
| Angular contact ball bearing, super-precision | ||
| Dimensions | ||
| d (Bore diameter) | 45 mm | 1.575 in |
| D (Outer diameter) | 68 mm | 3.15 in |
| B (Width) | 12 mm | 0.109 in |
| W (Weight) | 0.13 kg | 0.72 lbs |
| Technical Data | ||
| Cr (kN) Basic dynamic load rating | 7.02 | |
| C0r (kN) Basic static load rating | 5.5 | |
| Fatigue load limit (kN) | 0.17 | |
| Attainable speed for grease lubrication (r/min) | 30 000 | |
| Attainable speed for oil-air lubrication (r/min) | 45 000 | |
| Contact angle | 25 ° | |
| Ball diameter (mm) | 4.762 mm | |
| Number of balls | 27 | |
| Reference grease quantity | 1.75 cm3 | |
| Seal | No | |
| Precision | P4A | |
Extended 71909.ACB.HCP4AL angular contact ball bearings 45*68*12
| 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] | |
| 71909 ACB/P4A | 45 | 68 | 12 | 7.02 | 5.5 | 24 000 | 38 000 |
| 71909 ACB/P4AL | 45 | 68 | 12 | 7.02 | 5.5 | 24 000 | 38 000 |
| S71909 ACB/P4A | 45 | 68 | 12 | 7.02 | 5.5 | 24 000 | |
| 71909 ACB/HCP4A | 45 | 68 | 12 | 7.02 | 5.5 | 30 000 | 45 000 |
| 71909 ACB/HCP4AL | 45 | 68 | 12 | 7.02 | 5.5 | 30 000 | 45 000 |
| S71909 ACB/HCP4A | 45 | 68 | 12 | 7.02 | 5.5 | 30 000 | |
| 71909 CB/P4A | 45 | 68 | 12 | 7.41 | 5.85 | 28 000 | 43 000 |
| 71909 CB/P4AL | 45 | 68 | 12 | 7.41 | 5.85 | 28 000 | 43 000 |
| S71909 CB/P4A | 45 | 68 | 12 | 7.41 | 5.85 | 28 000 | |
| 71909 CB/HCP4A | 45 | 68 | 12 | 7.41 | 5.85 | 32 000 | 50 000 |
| 71909 CB/HCP4AL | 45 | 68 | 12 | 7.41 | 5.85 | 32 000 | 50 000 |
| S71909 CB/HCP4A | 45 | 68 | 12 | 7.41 | 5.85 | 32 000 | |
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