SKF
SKF 71906 ACD/P4A Angular Contact Ball Bearing
Product Code:71906 ACD/P4A
Description
Technical specification MetricImperial DIMENSIONS d 30 mmD 47 mmB 9 mmd1 35.6 mmd2 35.6 mmD1 41.4 mmr1,2min. 0.3 mmr3,4min. 0.2 mma 13.6 mm ABUTMENT DIMENSIONS damin. 32 mmdbmin. 32 mmDamax. 45 mmDbmax. 45.6 mmramax. 0.3 mmrbmax. 0.2 mmdn 36.8 mm CALCULATION DATA Basic dynamic load ratingC 6.76 kNBasic static load ratingC0 4.3 kNFatigue load limitPu 0.183 kNAttainable speed for grease lubrication 26000 r/minAttainable speed for oil-air lubrication 40000 r/minContact angle? 25 °Ball diameterDw 4.762 mmNumber of ballsz 20Reference grease quantityGref 0.63 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 40 NStatic axial stiffness, preload class A 65 N/µmPreload class BGB 80 NStatic axial stiffness, preload class B 83 N/µmPreload class CGC 160 NStatic axial stiffness, preload class C 109 N/µmPreload class DGD 320 NStatic axial stiffness, preload class D 145 N/µmCALCULATION FACTORSCalculation factorf 1.08Calculation factorf1 0.98Calculation factorf2A 1Calculation factorf2B 1.04Calculation factorf2C 1.08Calculation factorf2D 1.14Calculation factorfHC 1Calculation 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 0.048 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 30 mm | |
|---|---|---|
| D | 47 mm | |
| B | 9 mm | |
| d1 | 35.6 mm | |
| d2 | 35.6 mm | |
| D1 | 41.4 mm | |
| r1,2 | min. 0.3 mm | |
| r3,4 | min. 0.2 mm | |
| a | 13.6 mm |
ABUTMENT DIMENSIONS
| da | min. 32 mm | |
|---|---|---|
| db | min. 32 mm | |
| Da | max. 45 mm | |
| Db | max. 45.6 mm | |
| ra | max. 0.3 mm | |
| rb | max. 0.2 mm | |
| dn | 36.8 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 6.76 kN |
|---|---|---|
| Basic static load rating | C0 | 4.3 kN |
| Fatigue load limit | Pu | 0.183 kN |
| Attainable speed for grease lubrication | 26000 r/min | |
| Attainable speed for oil-air lubrication | 40000 r/min | |
| Contact angle | ? | 25 ° |
| Ball diameter | Dw | 4.762 mm |
| Number of balls | z | 20 |
| Reference grease quantity | Gref | 0.63 cm³ |
| Preload class A | GA | 40 N |
|---|---|---|
| Static axial stiffness, preload class A | 65 N/µm | |
| Preload class B | GB | 80 N |
| Static axial stiffness, preload class B | 83 N/µm | |
| Preload class C | GC | 160 N |
| Static axial stiffness, preload class C | 109 N/µm | |
| Preload class D | GD | 320 N |
| Static axial stiffness, preload class D | 145 N/µm |
| Calculation factor | f | 1.08 |
|---|---|---|
| Calculation factor | f1 | 0.98 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.04 |
| Calculation factor | f2C | 1.08 |
| Calculation factor | f2D | 1.14 |
| Calculation factor | fHC | 1 |
| 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 | 0.048 kg |
|---|