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NN4968KR

Double-Row Cylindrical Roller Bearings
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Parts Number
NN4968KRE44CC9P5 Double-Row Cylindrical Roller Bearings
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Parts Number

NN4968KRE44CC9P5

Boundary Dimensions

NN: Inner ring rib type Bearing Type
d 340 mm Bore diameter
D 460 mm Outside diameter
B 118 mm Width
r(min.) 3 mm Chamfer Dimension

Basic Load Ratings

Cr 1350 kN Basic Dynamic Load Rating
C0r 3400 kN Basic Static Load Rating

Speeds

Grease 1700 min-1 Limiting Speed
Oil (Oil-air) 2000 min-1 Limiting Speed

Dimensions

Ew 428 mm Roller Circumscribed Circle Diameters
s 3.0 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 353 mm Diameter of Shaft Abutment
d1a(min.) 363 mm Diameter of Shaft Abutment
Da(min.) 431 mm Diameter of Housing Abutment
Da(max.) 447 mm Diameter of Housing Abutment
ra(max.) 2.5 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 65 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 20 μm Clearance in Bearings with Cylindrical Bores
CC1(max.) 135 μm Clearance in Bearings with Tapered Bores
CC1(min.) 65 μm Clearance in Bearings with Tapered Bores
CC0(max.) 80 μm Clearance in Bearings with Tapered Bores
CC0(min.) 45 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. 65 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. 30 μm Clearance in Bearings with Tapered Bores

Holes Dimensions

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

Mass

52.6 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)
NN4968KRE44CC9P5 1350 3400 P5: ISO Class 5 1700 2000 52.6

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CAD
More Information
NSK Product Type2 SP_CRB_DR_NN49
NSK Product Type Super Precision Bearing
Designations NN4968KR

© NSK Ltd.

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