SKF 729 ACD/HCP4A Angular Contact Ball Bearing

Technical specification

MetricImperial DIMENSIONS d 9 mmD 26 mmB 8 mmd1 15.1 mmd2 15.1 mmD1 20.9 mmr1,2min. 0.3 mmr3,4min. 0.2 mma 8.3 mm ABUTMENT DIMENSIONS damin. 11.4 mmdbmin. 11.4 mmDamax. 23.6 mmDbmax. 24.2 mmramax. 0.3 mmrbmax. 0.2 mmdn 16.3 mm CALCULATION DATA Basic dynamic load ratingC 3.97 kNBasic static load ratingC0 1.6 kNFatigue load limitPu 0.049 kNAttainable speed for grease lubrication 70000 r/minAttainable speed for oil-air lubrication 110000 r/minContact angle? 25 °Ball diameterDw 4.762 mmNumber of ballsz 9Reference grease quantityGref 0.258 cm³PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)Preload class AGA 25 NStatic axial stiffness, preload class A 36 N/µmPreload class BGB 50 NStatic axial stiffness, preload class B 46 N/µmPreload class CGC 100 NStatic axial stiffness, preload class C 60 N/µmPreload class DGD 200 NStatic axial stiffness, preload class D 79 N/µmCALCULATION FACTORSCalculation factorf 1.02Calculation factorf1 0.99Calculation factorf2A 1Calculation factorf2B 1.01Calculation factorf2C 1.03Calculation factorf2D 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 0.018 kg