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NNU4938MBKR

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4938MBKRE44CC1P4 Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4938MBKRE44CC1P4

Boundary Dimensions

NNU: Outer 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 211.5 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(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
CC1(max.) 80 μm Clearance in Bearings with Tapered Bores
CC1(min.) 40 μm Clearance in Bearings with Tapered Bores
CC0(max.) 50 μm Clearance in Bearings with Tapered Bores
CC0(min.) 30 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. 40 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. 20 μm Clearance in Bearings with Tapered 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

9.91 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4938MBKR

© NSK Ltd.

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