SKF
SKF 71905 ACE/HCP4AL Angular Contact Ball Bearing
Product Code:71905 ACE/HCP4AL
Description
Technical specification MetricImperial DIMENSIONS d 25 mmD 42 mmB 9 mmd1 30.7 mmd2 29.4 mmD1 36.39 mmb 1.5 mmC1 4.6 mmC2 1.4 mmC3 0.9 mmr1,2min. 0.3 mmr3,4min. 0.15 mma 12.8 mm ABUTMENT DIMENSIONS damin. 27 mmdbmin. 27 mmDamax. 40 mmDbmax. 41.2 mmramax. 0.3 mmrbmax. 0.15 mmdn 31.8 mm CALCULATION DATA Basic dynamic load ratingC 4.94 kNBasic static load ratingC0 2.7 kNFatigue load limitPu 0.114 kNAttainable speed for grease lubrication 52000 r/minAttainable speed for oil-air lubrication 83000 r/minContact angle? 25 °Ball diameterDw 4.762 mmNumber of ballsz 16Reference grease quantityGref 0.6 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 45 NStatic axial stiffness, preload class A 57 N/µmPreload class BGB 140 NStatic axial stiffness, preload class B 86 N/µmPreload class CGC 270 NStatic axial stiffness, preload class C 111 N/µmCALCULATION FACTORSCalculation factorf 1.06Calculation factorf1 0.98Calculation factorf2A 1Calculation factorf2B 1.04Calculation 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 0.036 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 25 mm | |
|---|---|---|
| D | 42 mm | |
| B | 9 mm | |
| d1 | 30.7 mm | |
| d2 | 29.4 mm | |
| D1 | 36.39 mm | |
| b | 1.5 mm | |
| C1 | 4.6 mm | |
| C2 | 1.4 mm | |
| C3 | 0.9 mm | |
| r1,2 | min. 0.3 mm | |
| r3,4 | min. 0.15 mm | |
| a | 12.8 mm |
ABUTMENT DIMENSIONS
| da | min. 27 mm | |
|---|---|---|
| db | min. 27 mm | |
| Da | max. 40 mm | |
| Db | max. 41.2 mm | |
| ra | max. 0.3 mm | |
| rb | max. 0.15 mm | |
| dn | 31.8 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 4.94 kN |
|---|---|---|
| Basic static load rating | C0 | 2.7 kN |
| Fatigue load limit | Pu | 0.114 kN |
| Attainable speed for grease lubrication | 52000 r/min | |
| Attainable speed for oil-air lubrication | 83000 r/min | |
| Contact angle | ? | 25 ° |
| Ball diameter | Dw | 4.762 mm |
| Number of balls | z | 16 |
| Reference grease quantity | Gref | 0.6 cm³ |
| Preload class A | GA | 45 N |
|---|---|---|
| Static axial stiffness, preload class A | 57 N/µm | |
| Preload class B | GB | 140 N |
| Static axial stiffness, preload class B | 86 N/µm | |
| Preload class C | GC | 270 N |
| Static axial stiffness, preload class C | 111 N/µm |
| Calculation factor | f | 1.06 |
|---|---|---|
| Calculation factor | f1 | 0.98 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.04 |
| 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 | 0.036 kg |
|---|