Cylindrical Roller Bearings N1020K KOYO - Kevin Global Machinery Parts Company

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Cylindrical Roller Bearings N1020K KOYO Codes and sizes

Bearing number:71956 CD/HCP4A
Size (mm):380x280x46
Bore Diameter (mm):380
Outer Diameter (mm):280
Width (mm):46
d:280 mm
D:380 mm
B:46 mm
d1:311.8 mm
d2:311.8 mm
D1:348.2 mm
r1,2 - min.:2.1 mm
r3,4 - min.:1.1 mm
a:67.4 mm
da - min.:291 mm
db - min.:291 mm
Da - max.:369 mm
Db - max.:374 mm
ra - max.:2 mm
rb - max.:1 mm
dn:319.7 mm
Basic dynamic load rating - C:291 kN
Basic static load rating - C0:455 kN
Fatigue load limit - Pu:10.6 kN
Limiting speed for grease lubrication:4000 r/min
Limiting speed for oil lubrication:5600 mm/min
Ball - Dw:30.162 mm
Ball - z:31
Gref:159 cm3
Calculation factor - f0:16.7
Preload class A - GA:1090 N
Preload class B - GB:2180 N
Preload class C - GC:4360 N
Preload class D - GD:8720 N
Calculation factor - f:1
Calculation factor - f2A:1
Calculation factor - f2B:1.07
Calculation factor - f2C:1.12
Calculation factor - f2D:1.18
Calculation factor - fHC:1.04
Preload class A:295 N/micron
Preload class B:403 N/micron
Preload class C:565 N/micron
Preload class D:822 N/micron
r1,2 min.:2.1 mm
r3,4 min.:1.1 mm
da min.:291 mm
db min.:291 mm
Da max.:369 mm
Db max.:374 mm
ra max.:2 mm
rb max.:1 mm
Basic dynamic load rating C:291 kN
Basic static load rating C0:455 kN
Fatigue load limit Pu:10.6 kN
Attainable speed for grease lubrication:4000 r/min
Attainable speed for oil-air lubrication:5600 r/min
Ball diameter Dw:30.162 mm
Number of balls z:31
Reference grease quantity Gref:159 cm³
Preload class A GA:1090 N
Static axial stiffness, preload class A:295 N/µm
Preload class B GB:2180 N
Static axial stiffness, preload class B:403 N/µm
Preload class C GC:4360 N
Static axial stiffness, preload class C:565 N/µm
Preload class D GD:8720 N
Static axial stiffness, preload class D:822 N/µm
Calculation factor f:1.27
Calculation factor f1:1
Calculation factor f2A:1
Calculation factor f2B:1.07
Calculation factor f2C:1.12
Calculation factor f2D:1.18
Calculation factor fHC:1.04
Calculation factor f0:16.7
Mass bearing:11.1 kg

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