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NN4921MB

Double-Row Cylindrical Roller Bearings

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Parts Number
NN4921MBCC1P4Y Double-Row Cylindrical Roller Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Parts Number

NN4921MBCC1P4Y

Boundary Dimensions

	NN: Inner ring rib type		Bearing Type
d	105	mm	Bore diameter
D	145	mm	Outside diameter
B	40	mm	Width
r(min.)	1.1	mm	Chamfer Dimension

Basic Load Ratings

C_r	185	kN	Basic Dynamic Load Rating
C_0r	315	kN	Basic Static Load Rating

Speeds

Grease	6000	min^-1	Limiting Speed
Oil (Oil-air)	7200	min^-1	Limiting Speed

Dimensions

Ew	135	mm	Roller Circumscribed Circle Diameters
s	1.2	mm	Axial Displacement

Abutment and Fillet Dimensions

da(min.)	111.5	mm	Diameter of Shaft Abutment
d1a(min.)	113	mm	Diameter of Shaft Abutment
Da(min.)	137	mm	Diameter of Housing Abutment
Da(max.)	138.5	mm	Diameter of Housing Abutment
ra(max.)	1	mm	Radius of Shaft or Housing Fillet

Additional information

CC1(max.)	30	μm	Clearance in Bearings with Cylindrical Bores
CC1(min.)	10	μm	Clearance in Bearings with Cylindrical Bores
	5.6	g/brg	Recommended Grease Quantities

Holes Dimensions

dh	2.5	mm	Hole Diameter
W	5	mm	Oil Groove Width
m	4		Number of Holes

Mass

1.91

kg

Mass(approx.)

CAD

Customer Questions

More Information

More Information
NSK Product Type2	SP_CRB_DR_NN49
NSK Product Type	Super Precision Bearing
Designations	NN4921MB

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