SKF
SKF 708 ACE/HCP4AH Angular Contact Ball Bearing
Product Code:708 ACE/HCP4AH
Description
Technical specification
MetricImperial DIMENSIONS d 8 mmD 22 mmB 7 mmd1 12.1 mmd2 11.5 mmD1 17.9 mmK 0.5 mmC1 4.25 mmr1,2min. 0.3 mmr3,4min. 0.15 mma 7.1 mm ABUTMENT DIMENSIONS damin. 10 mmdbmin. 10 mmDamax. 20 mmDbmax. 20.6 mmramax. 0.3 mmrbmax. 0.15 mmdn 13.3 mm CALCULATION DATA Basic dynamic load ratingC 2.29 kNBasic static load ratingC0 0.765 kNFatigue load limitPu 0.024 kNAttainable speed for grease lubrication 115000 r/minAttainable speed for oil-air lubrication 180000 r/minContact angle? 25 °Ball diameterDw 3.969 mmNumber of ballsz 8Reference grease quantityGref 0.17 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 20 NStatic axial stiffness, preload class A 26 N/µmPreload class BGB 60 NStatic axial stiffness, preload class B 38 N/µmPreload class CGC 120 NStatic axial stiffness, preload class C 50 N/µmCALCULATION FACTORSCalculation factorf 1.02Calculation factorf1 0.99Calculation factorf2A 1Calculation factorf2B 1.03Calculation factorf2C 1.06Calculation 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 0.011 kgTechnical Specifications
Technical specification
DIMENSIONS
| d | 8 mm | |
|---|---|---|
| D | 22 mm | |
| B | 7 mm | |
| d1 | 12.1 mm | |
| d2 | 11.5 mm | |
| D1 | 17.9 mm | |
| K | 0.5 mm | |
| C1 | 4.25 mm | |
| r1,2 | min. 0.3 mm | |
| r3,4 | min. 0.15 mm | |
| a | 7.1 mm |
ABUTMENT DIMENSIONS
| da | min. 10 mm | |
|---|---|---|
| db | min. 10 mm | |
| Da | max. 20 mm | |
| Db | max. 20.6 mm | |
| ra | max. 0.3 mm | |
| rb | max. 0.15 mm | |
| dn | 13.3 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 2.29 kN |
|---|---|---|
| Basic static load rating | C0 | 0.765 kN |
| Fatigue load limit | Pu | 0.024 kN |
| Attainable speed for grease lubrication | 115000 r/min | |
| Attainable speed for oil-air lubrication | 180000 r/min | |
| Contact angle | ? | 25 ° |
| Ball diameter | Dw | 3.969 mm |
| Number of balls | z | 8 |
| Reference grease quantity | Gref | 0.17 cm³ |
| Preload class A | GA | 20 N |
|---|---|---|
| Static axial stiffness, preload class A | 26 N/µm | |
| Preload class B | GB | 60 N |
| Static axial stiffness, preload class B | 38 N/µm | |
| Preload class C | GC | 120 N |
| Static axial stiffness, preload class C | 50 N/µm |
| Calculation factor | f | 1.02 |
|---|---|---|
| Calculation factor | f1 | 0.99 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.03 |
| Calculation factor | f2C | 1.06 |
| 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 | 0.011 kg |
|---|