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NNU4988K

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4988KCC1P5 Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4988KCC1P5

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
CC1(max.) 170 μm Clearance in Bearings with Tapered Bores
CC1(min.) 85 μm Clearance in Bearings with Tapered Bores
CC0(max.) 105 μm Clearance in Bearings with Tapered Bores
CC0(min.) 60 μm Clearance in Bearings with Tapered Bores
CC9(max.) 85 μm Clearance in Bearings with Tapered Bores
CC9(min.) 40 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

123 kg Mass(approx.)
Designations Basic Load Ratings Radial Internal Clearance Accuracy Limiting Speeds Mass
Cr
 C0r
 min
 max
 Grease
(min-1)		 Oil (Oil-air)
(min-1)
(kg)
NNU4988KCC1P5 2370 6000 P5: ISO Class 5 1100 1400 123

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CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4988K

© NSK Ltd.

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