SKF S7021ACD/P4A Angular contact ball bearings,SKF S7021 ACD/P4A Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S7021 ACD/P4A

S7021 ACD/P4A

Dimensions
d 105mm
D 160mm
B 26mm
d1 121.9mm
d2 121.9mm
D2 146.75mm
r1,2min.2mm
r3,4min.1mm
a 44mm
Abutment dimensions
damin.114mm
damax.121.3mm
dbmin.114mm
dbmax.121.3mm
Damax.151mm
Dbmax.155mm
ramax.2mm
rbmax.1mm
Calculation data
Basic dynamic load ratingC 90.4kN
Basic static load ratingC0 93kN
Fatigue load limitPu 3.4kN
Attainable speed for grease lubrication  7500r/min
Ball diameterDw 17.462mm
Number of ballsz 21 
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 560N
Static axial stiffness, preload class A  279N/µm
Preload class BGB 1120N
Static axial stiffness, preload class B  365N/µm
Preload class CGC 2240N
Static axial stiffness, preload class C  484N/µm
Preload class DGD 4480N
Static axial stiffness, preload class D  655N/µm
Calculation factors
Calculation factorf 1.15 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.02 
Calculation factorf2C 1.05 
Calculation factorf2D 1.08 
Calculation factorfHC 1 
Calculation factore 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  1.61kg
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Hot number: 15209 130 VA R 35020 471401 7019 ACB/HCP4A 7218 CD/P4A 7228 BCBM 7230 BGAM 82540 HA 3040 L 865547/512 MS 30/800-750 MVR1-95 NKI 55/25 TN S71910 ACE/HCP4A

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