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NN3976KR

Double-Row Cylindrical Roller Bearings
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Parts Number
NN3976KRE44CC9P4Y Double-Row Cylindrical Roller Bearings
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Parts Number

NN3976KRE44CC9P4Y

Boundary Dimensions

NN: Inner ring rib type Bearing Type
d 380 mm Bore diameter
D 520 mm Outside diameter
B 106 mm Width
r(min.) 4 mm Chamfer Dimension

Basic Load Ratings

Cr 1250 kN Basic Dynamic Load Rating
C0r 2730 kN Basic Static Load Rating

Speeds

Grease 1500 min-1 Limiting Speed
Oil (Oil-air) 1800 min-1 Limiting Speed

Dimensions

Ew 484 mm Roller Circumscribed Circle Diameters
s 3.5 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 396 mm Diameter of Shaft Abutment
d1a(min.) 405 mm Diameter of Shaft Abutment
Da(min.) 487 mm Diameter of Housing Abutment
Da(max.) 504 mm Diameter of Housing Abutment
ra(max.) 3 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 75 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 25 μm Clearance in Bearings with Cylindrical Bores
CC1(max.) 150 μm Clearance in Bearings with Tapered Bores
CC1(min.) 75 μm Clearance in Bearings with Tapered Bores
CC0(max.) 90 μm Clearance in Bearings with Tapered Bores
CC0(min.) 50 μm Clearance in Bearings with Tapered Bores
CC9(max.) Clearance CC9 applicale to cylindrical roller bearings with tapered bores in ISO Tolerance Classes 5 and 4. 75 μm Clearance in Bearings with Tapered Bores
CC9(min.) Clearance CC9 applicale to cylindrical roller bearings with tapered bores in ISO Tolerance Classes 5 and 4. 35 μm Clearance in Bearings with Tapered Bores

Holes Dimensions

dh 6 mm Hole Diameter
W 12 mm Oil Groove Width
m 4 Number of Holes

Mass

63.5 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NN39
NSK Product Type Super Precision Bearing
Designations NN3976KR

© NSK Ltd.

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