SKF 7218ACD/P4A Angular contact ball bearings,SKF 7218 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 7218 ACD/P4A

7218 ACD/P4A

Dimensions
d 90mm
D 160mm
B 30mm
d1 111.6mm
d2 111.6mm
D1 138.4mm
r1,2min.2mm
r3,4min.1mm
a 44.3mm
Abutment dimensions
damin.101mm
dbmin.101mm
Damax.149mm
Dbmax.154.4mm
ramax.2mm
rbmax.1mm
dn 117.5mm
Calculation data
Basic dynamic load ratingC 121kN
Basic static load ratingC0 106kN
Fatigue load limitPu 4.05kN
Attainable speed for grease lubrication  7500r/min
Attainable speed for oil-air lubrication  12000r/min
Ball diameterDw 22.225mm
Number of ballsz 16 
Reference grease quantityGref 27.765cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 750N
Static axial stiffness, preload class A  273N/µm
Preload class BGB 1500N
Static axial stiffness, preload class B  355N/µm
Preload class CGC 3000N
Static axial stiffness, preload class C  469N/µm
Preload class DGD 6000N
Static axial stiffness, preload class D  632N/µm
Calculation factors
Calculation factorf 1.09 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.01 
Calculation factorf2C 1.02 
Calculation factorf2D 1.05 
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  2.27kg
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Hot number: 200 VA R 249/850 CAK30/W33 32011 X/DF 650 VA R 7515 71916 CD/HCP4AH1 71918 CE/HCP4AH1 C 2220 K C 30/560 KM D/W R1810-2ZS FYTB 1.1/4 RM H 2320 SSAFS 22518 x 3.1/4 TLC W 6302-2RS1 ZW 12x17

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