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NNU4988

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4988E44CC1P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4988E44CC1P4

Boundary Dimensions

NNU: Outer ring rib type Bearing Type
d 440 mm Bore diameter
D 600 mm Outside diameter
B 160 mm Width
r(min.) 4 mm Chamfer Dimension

Basic Load Ratings

Cr 2370 kN Basic Dynamic Load Rating
C0r 6000 kN Basic Static Load Rating

Speeds

Grease 1100 min-1 Limiting Speed
Oil (Oil-air) 1400 min-1 Limiting Speed

Dimensions

Ew 487 mm Roller Circumscribed Circle Diameters
s 3.3 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 456 mm Diameter of Shaft Abutment
d1a(min.) 469 mm Diameter of Shaft Abutment
Da(max.) 584 mm Diameter of Housing Abutment
ra(max.) 3 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 85 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 25 μm Clearance in Bearings with Cylindrical Bores

Holes Dimensions

dh 8 mm Hole Diameter
W 15 mm Oil Groove Width
m 4 Number of Holes

Mass

123 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4988

© NSK Ltd.

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