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NN4938MB

Double-Row Cylindrical Roller Bearings
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Parts Number
NN4938MBCC1P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NN4938MBCC1P4

Boundary Dimensions

NN: Inner ring rib type Bearing Type
d 190 mm Bore diameter
D 260 mm Outside diameter
B 69 mm Width
r(min.) 2 mm Chamfer Dimension

Basic Load Ratings

Cr 555 kN Basic Dynamic Load Rating
C0r 1060 kN Basic Static Load Rating

Speeds

Grease 3400 min-1 Limiting Speed
Oil (Oil-air) 4000 min-1 Limiting Speed

Dimensions

Ew 243.5 mm Roller Circumscribed Circle Diameters
s 1.3 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 199 mm Diameter of Shaft Abutment
d1a(min.) 203 mm Diameter of Shaft Abutment
Da(min.) 246 mm Diameter of Housing Abutment
Da(max.) 251 mm Diameter of Housing Abutment
ra(max.) 2 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 45 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 15 μm Clearance in Bearings with Cylindrical Bores
30 g/brg Recommended Grease Quantities

Holes Dimensions

dh 5 mm Hole Diameter
W 9 mm Oil Groove Width
m 4 Number of Holes

Mass

9.72 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NN49
NSK Product Type Super Precision Bearing
Designations NN4938MB

© NSK Ltd.

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