SKF
SKF 71910 ACB/HCP4A Angular Contact Ball Bearing
Product Code:71910 ACB/HCP4A
Description
Technical specification MetricImperial DIMENSIONS d 50 mmD 72 mmB 12 mmd1 57.95 mmd2 56.9 mmD2 66.04 mmr1,2min. 0.6 mmr3,4min. 0.3 mma 23.2 mm ABUTMENT DIMENSIONS damin. 53.2 mmdbmin. 53.2 mmDamax. 68.8 mmDbmax. 70 mmramax. 0.6 mmrbmax. 0.3 mmdn 58.7 mm CALCULATION DATA Basic dynamic load ratingC 7.28 kNBasic static load ratingC0 6 kNFatigue load limitPu 0.183 kNAttainable speed for grease lubrication 28000 r/minAttainable speed for oil-air lubrication 43000 r/minContact angle? 25 °Ball diameterDw 4.762 mmNumber of ballsz 29Reference grease quantityGref 1.89 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 43 NStatic axial stiffness, preload class A 89 N/µmPreload class BGB 86 NStatic axial stiffness, preload class B 114 N/µmPreload class CGC 260 NStatic axial stiffness, preload class C 172 N/µmCALCULATION FACTORSCalculation factorf 1.09Calculation factorf1 0.99Calculation factorf2A 1Calculation factorf2B 1.02Calculation factorf2C 1.08Calculation factorfHC 1.01Calculation factore 0.68Calculation factor (single, tandem)Y2 0.87Calculation factor (single, tandem)Y0 0.38Calculation factor (single, tandem)X2 0.41Calculation factor (back-to-back, face-to-face)Y1 0.92Calculation factor (back-to-back, face-to-face)Y2 1.41Calculation factor (back-to-back, face-to-face)Y0 0.76Calculation factor (back-to-back, face-to-face)X2 0.67 MASS Mass bearing 0.13 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 50 mm | |
|---|---|---|
| D | 72 mm | |
| B | 12 mm | |
| d1 | 57.95 mm | |
| d2 | 56.9 mm | |
| D2 | 66.04 mm | |
| r1,2 | min. 0.6 mm | |
| r3,4 | min. 0.3 mm | |
| a | 23.2 mm |
ABUTMENT DIMENSIONS
| da | min. 53.2 mm | |
|---|---|---|
| db | min. 53.2 mm | |
| Da | max. 68.8 mm | |
| Db | max. 70 mm | |
| ra | max. 0.6 mm | |
| rb | max. 0.3 mm | |
| dn | 58.7 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 7.28 kN |
|---|---|---|
| Basic static load rating | C0 | 6 kN |
| Fatigue load limit | Pu | 0.183 kN |
| Attainable speed for grease lubrication | 28000 r/min | |
| Attainable speed for oil-air lubrication | 43000 r/min | |
| Contact angle | ? | 25 ° |
| Ball diameter | Dw | 4.762 mm |
| Number of balls | z | 29 |
| Reference grease quantity | Gref | 1.89 cm³ |
| Preload class A | GA | 43 N |
|---|---|---|
| Static axial stiffness, preload class A | 89 N/µm | |
| Preload class B | GB | 86 N |
| Static axial stiffness, preload class B | 114 N/µm | |
| Preload class C | GC | 260 N |
| Static axial stiffness, preload class C | 172 N/µm |
| Calculation factor | f | 1.09 |
|---|---|---|
| Calculation factor | f1 | 0.99 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.02 |
| Calculation factor | f2C | 1.08 |
| Calculation factor | fHC | 1.01 |
| Calculation factor | e | 0.68 |
| Calculation factor (single, tandem) | Y2 | 0.87 |
| Calculation factor (single, tandem) | Y0 | 0.38 |
| Calculation factor (single, tandem) | X2 | 0.41 |
| Calculation factor (back-to-back, face-to-face) | Y1 | 0.92 |
| Calculation factor (back-to-back, face-to-face) | Y2 | 1.41 |
| Calculation factor (back-to-back, face-to-face) | Y0 | 0.76 |
| Calculation factor (back-to-back, face-to-face) | X2 | 0.67 |
MASS
| Mass bearing | 0.13 kg |
|---|