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NNU4944MB

Double-Row Cylindrical Roller Bearings
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Parts Number
NNU4944MBE44CC1P5 Double-Row Cylindrical Roller Bearings
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Parts Number

NNU4944MBE44CC1P5

Boundary Dimensions

NNU: Outer ring rib type Bearing Type
d 220 mm Bore diameter
D 300 mm Outside diameter
B 80 mm Width
r(min.) 2.1 mm Chamfer Dimension

Basic Load Ratings

Cr 690 kN Basic Dynamic Load Rating
C0r 1330 kN Basic Static Load Rating

Speeds

Grease 2500 min-1 Limiting Speed
Oil (Oil-air) 3100 min-1 Limiting Speed

Dimensions

Ew 243 mm Roller Circumscribed Circle Diameters
s 3.3 mm Axial Displacement

Abutment and Fillet Dimensions

da(min.) 231 mm Diameter of Shaft Abutment
d1a(min.) 234 mm Diameter of Shaft Abutment
Da(max.) 289 mm Diameter of Housing Abutment
ra(max.) 2 mm Radius of Shaft or Housing Fillet

Additional information

CC1(max.) 50 μm Clearance in Bearings with Cylindrical Bores
CC1(min.) 15 μm Clearance in Bearings with Cylindrical Bores
37 g/brg Recommended Grease Quantities

Holes Dimensions

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

Mass

15.2 kg Mass(approx.)
CAD
More Information
NSK Product Type2 SP_CRB_DR_NNU
NSK Product Type Super Precision Bearing
Designations NNU4944MB

© NSK Ltd.

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