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NN4988

Double-Row Cylindrical Roller Bearings
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Parts Number
NN4988E44CC1P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NN4988E44CC1P4

Boundary Dimensions

NN: Inner 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 559 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(min.) 562 mm Diameter of Housing 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_NN49
NSK Product Type Super Precision Bearing
Designations NN4988

© NSK Ltd.

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