SKF 7028CD/HCP4AH1 Angular contact ball bearings,SKF 7028 CD/HCP4AH1 Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7028 CD/HCP4AH1

7028 CD/HCP4AH1

Dimensions
d 140mm
D 210mm
B 33mm
d1 161.6mm
d2 161.6mm
D1 188.4mm
K 0.5mm
C1 8.9mm
r1,2min.2mm
r3,4min.1mm
a 40.1mm
Abutment dimensions
damin.149mm
dbmin.149mm
Damax.201mm
Dbmax.205mm
ramax.2mm
rbmax.1mm
dn 166.3mm
Calculation data
Basic dynamic load ratingC 153kN
Basic static load ratingC0 166kN
Fatigue load limitPu 5.3kN
Attainable speed for grease lubrication  7500r/min
Attainable speed for oil-air lubrication  12000r/min
Ball diameterDw 22.225mm
Number of ballsz 22 
Reference grease quantityGref 45cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 570N
Static axial stiffness, preload class A  168N/µm
Preload class BGB 1140N
Static axial stiffness, preload class B  228N/µm
Preload class CGC 2280N
Static axial stiffness, preload class C  320N/µm
Preload class DGD 4560N
Static axial stiffness, preload class D  464N/µm
Calculation factors
Calculation factorf 1.16 
Calculation factorf1 1 
Calculation factorf2A 1 
Calculation factorf2B 1.02 
Calculation factorf2C 1.05 
Calculation factorf2D 1.09 
Calculation factorfHC 1.02 
Calculation factorf0 15.8 
Mass
Mass bearing  2.83kg
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Hot number： 12x25x7 HMS5 RG BD-23228 CCK/W33-AHX 3228 G 25x37x7 HMS5 RG 6202-RSL 6211/HR11QN 6313-2Z/VA228 65x95x10 HMSA10 RG 7017 ACE/HCP4AH1 71922 CB/HCP4AL BC4B 326909 A/HA3 GEZH 204 ES-2LS LM 48548 A/510 NKI 5/16 TN SNL 3076 TURT SYFWK 508 L

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