SKF
SKF 71911 CD/P4AL Angular Contact Ball Bearing
Product Code:71911 CD/P4AL
Description
Technical specification MetricImperial DIMENSIONS d 55 mmD 80 mmB 13 mmd1 62.7 mmd2 62.7 mmD1 72.3 mmb 2.2 mmC1 6.5 mmC2 3.2 mmC3 2 mmr1,2min. 1 mmr3,4min. 0.3 mma 15.6 mm ABUTMENT DIMENSIONS damin. 59.6 mmdbmin. 59.6 mmDamax. 75.4 mmDbmax. 78 mmramax. 1 mmrbmax. 0.3 mmdn 64.7 mm CALCULATION DATA Basic dynamic load ratingC 19.5 kNBasic static load ratingC0 14.6 kNFatigue load limitPu 0.62 kNAttainable speed for grease lubrication 16000 r/minAttainable speed for oil-air lubrication 26000 r/minContact angle? 15 °Ball diameterDw 7.938 mmNumber of ballsz 23Reference grease quantityGref 2.49 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 70 NStatic axial stiffness, preload class A 49 N/µmPreload class BGB 140 NStatic axial stiffness, preload class B 65 N/µmPreload class CGC 280 NStatic axial stiffness, preload class C 89 N/µmPreload class DGD 560 NStatic axial stiffness, preload class D 126 N/µmCALCULATION FACTORSCalculation factorf 1.15Calculation factorf1 1Calculation factorf2A 1Calculation factorf2B 1.04Calculation factorf2C 1.09Calculation factorf2D 1.15Calculation factorfHC 1Calculation factorf0 10.4 MASS Mass bearing 0.18 kg
Technical Specifications
Technical specification 
DIMENSIONS
| d | 55 mm | |
|---|---|---|
| D | 80 mm | |
| B | 13 mm | |
| d1 | 62.7 mm | |
| d2 | 62.7 mm | |
| D1 | 72.3 mm | |
| b | 2.2 mm | |
| C1 | 6.5 mm | |
| C2 | 3.2 mm | |
| C3 | 2 mm | |
| r1,2 | min. 1 mm | |
| r3,4 | min. 0.3 mm | |
| a | 15.6 mm |
ABUTMENT DIMENSIONS
| da | min. 59.6 mm | |
|---|---|---|
| db | min. 59.6 mm | |
| Da | max. 75.4 mm | |
| Db | max. 78 mm | |
| ra | max. 1 mm | |
| rb | max. 0.3 mm | |
| dn | 64.7 mm |
CALCULATION DATA
| Basic dynamic load rating | C | 19.5 kN |
|---|---|---|
| Basic static load rating | C0 | 14.6 kN |
| Fatigue load limit | Pu | 0.62 kN |
| Attainable speed for grease lubrication | 16000 r/min | |
| Attainable speed for oil-air lubrication | 26000 r/min | |
| Contact angle | ? | 15 ° |
| Ball diameter | Dw | 7.938 mm |
| Number of balls | z | 23 |
| Reference grease quantity | Gref | 2.49 cm³ |
| Preload class A | GA | 70 N |
|---|---|---|
| Static axial stiffness, preload class A | 49 N/µm | |
| Preload class B | GB | 140 N |
| Static axial stiffness, preload class B | 65 N/µm | |
| Preload class C | GC | 280 N |
| Static axial stiffness, preload class C | 89 N/µm | |
| Preload class D | GD | 560 N |
| Static axial stiffness, preload class D | 126 N/µm |
| Calculation factor | f | 1.15 |
|---|---|---|
| Calculation factor | f1 | 1 |
| Calculation factor | f2A | 1 |
| Calculation factor | f2B | 1.04 |
| Calculation factor | f2C | 1.09 |
| Calculation factor | f2D | 1.15 |
| Calculation factor | fHC | 1 |
| Calculation factor | f0 | 10.4 |
MASS
| Mass bearing | 0.18 kg |
|---|