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NNU4956KR

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4956KRE44CC0P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4956KRE44CC0P4

Boundary Dimensions

NNU: Outer ring rib type Bearing Type
d 280 mm Bore diameter
D 380 mm Outside diameter
B 100 mm Width
r(min.) 2.1 mm Chamfer Dimension

Basic Load Ratings

Cr 960 kN Basic Dynamic Load Rating
C0r 2230 kN Basic Static Load Rating

Speeds

Grease 2000 min-1 Limiting Speed
Oil (Oil-air) 2500 min-1 Limiting Speed

Dimensions

Ew 309 mm Roller Circumscribed Circle Diameters
s 2.4 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 291 mm Diameter of Shaft Abutment
d1a(min.) 295 mm Diameter of Shaft Abutment
Da(max.) 369 mm Diameter of Housing Abutment
ra(max.) 2 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 55 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 20 μm Clearance in Bearings with Cylindrical Bores
CC1(max.) 110 μm Clearance in Bearings with Tapered Bores
CC1(min.) 55 μm Clearance in Bearings with Tapered Bores
CC0(max.) 70 μm Clearance in Bearings with Tapered Bores
CC0(min.) 40 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. 55 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. 25 μm Clearance in Bearings with Tapered Bores
95 g/brg Recommended Grease Quantities

Holes Dimensions

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

Mass

33.1 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4956KR

© NSK Ltd.

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