N22 KOYO Single-row cylindrical roller bearings
Brand Name:KOYO
Model Number:N22
Bearing number:71960 ACDMA/P4A
Size (mm):300x420x56
Bore Diameter (mm):300
Outer Diameter (mm):420
Width (mm):56
d:300 mm
D:420 mm
B:56 mm

Product Details

Bearing number71960 ACDMA/P4A
Size (mm)300x420x56
Bore Diameter (mm)300
Outer Diameter (mm)420
Width (mm)56
d300 mm
D420 mm
B56 mm
C56 mm
d1337 mm
d2337 mm
r1 min.3 mm
r2 min.3 mm
r3 min.1,1 mm
r4 min.1,1 mm
D1383 mm
D2– mm
da min.313 mm
Da max.405 mm
db min313 mm
ra max.2.5 mm
rb max.1 mm
dh347 mm
Db max414 mm
Weight23 Kg
Basic dynamic load rating (C)351 kN
Basic static load rating (C0)560 kN
(Grease) Lubrication Speed2 200 r/min
(Oil) Lubrication Speed3 400 r/min
Fatigue load limit (Pu)12,7
r1,2 min.3 mm
r3,4 min.1.1 mm
a112.3 mm
db min.313 mm
Db max.414 mm
dn347 mm
Basic dynamic load rating C351 kN
Basic static load rating C0560 kN
Fatigue load limit Pu12.7 kN
Attainable speed for grease lubrication2200 r/min
Attainable speed for oil-air lubrication3400 r/min
Ball diameter Dw38.1 mm
Number of balls z26
Reference grease quantity Gref265 cm³
Preload class A GA2200 N
Static axial stiffness, preload class A663 N/µm
Preload class B GB4400 N
Static axial stiffness, preload class B866 N/µm
Preload class C GC8800 N
Static axial stiffness, preload class C1146 N/µm
Preload class D GD17600 N
Static axial stiffness, preload class D1548 N/µm
Calculation factor f1.22
Calculation factor f10.98
Calculation factor f2A1
Calculation factor f2B1.04
Calculation factor f2C1.08
Calculation factor f2D1.14
Calculation factor fHC1
Calculation factor e0.68
Calculation factor (single, tandem) Y20.87
Calculation factor (single, tandem) Y00.38
Calculation factor (single, tandem) X20.41
Calculation factor (back-to-back, face-to-face) Y10.92
Calculation factor (back-to-back, face-to-face) Y21.41
Calculation factor (back-to-back, face-to-face) Y00.76
Calculation factor (back-to-back, face-to-face) X20.67
Mass bearing23 kg
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Company Profile

LY　MANUFACTURING CO.,LTD.
Phone 91-22-28768900
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