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NNU4976KR

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4976KRE44CC1P4Y Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4976KRE44CC1P4Y

Boundary Dimensions

NNU: Outer ring rib type Bearing Type
d 380 mm Bore diameter
D 520 mm Outside diameter
B 140 mm Width
r(min.) 4 mm Chamfer Dimension

Basic Load Ratings

Cr 1880 kN Basic Dynamic Load Rating
C0r 4600 kN Basic Static Load Rating

Speeds

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

Dimensions

Ew 421 mm Roller Circumscribed Circle Diameters
s 3.8 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 396 mm Diameter of Shaft Abutment
d1a(min.) 408 mm Diameter of Shaft 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 8 mm Hole Diameter
W 15 mm Oil Groove Width
m 4 Number of Holes

Mass

88.8 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4976KR

© NSK Ltd.

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