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NN4948MB

Double-Row Cylindrical Roller Bearings

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Parts Number
NN4948MBCC1P5 Double-Row Cylindrical Roller Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Parts Number

NN4948MBCC1P5

Boundary Dimensions

	NN: Inner ring rib type		Bearing Type
d	240	mm	Bore diameter
D	320	mm	Outside diameter
B	80	mm	Width
r(min.)	2.1	mm	Chamfer Dimension

Basic Load Ratings

C_r	720	kN	Basic Dynamic Load Rating
C_0r	1450	kN	Basic Static Load Rating

Speeds

Grease	2400	min^-1	Limiting Speed
Oil (Oil-air)	2900	min^-1	Limiting Speed

Dimensions

Ew	300	mm	Roller Circumscribed Circle Diameters
s	1.8	mm	Axial Displacement

Abutment and Fillet Dimensions

da(min.)	251	mm	Diameter of Shaft Abutment
d1a(min.)	254	mm	Diameter of Shaft Abutment
Da(min.)	302	mm	Diameter of Housing Abutment
Da(max.)	309	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
	52	g/brg	Recommended Grease Quantities

Holes Dimensions

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

Mass

17.8

kg

Mass(approx.)

CAD

Customer Questions

More Information

More Information
NSK Product Type2	SP_CRB_DR_NN49
NSK Product Type	Super Precision Bearing
Designations	NN4948MB

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