Single-Row Deep Groove Ball Bearings

6311

Single-Row Deep Groove Ball Bearings

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Parts Number
6311

Product Information

Display units Metric Imperial

Parts Number

6311

Boundary Dimensions

d	55	mm	Bore diameter
D	120	mm	Outside diameter
B	29	mm	Width
r (min.)	2	mm	Chamfer dimension

Basic Load Ratings

Cr	78500	N	Basic dynamic load rating
C0r	44500	N	Basic static load rating

Speeds

Grease	6700	min-1	Grease lubrication
Oil (Oil-bath)	8000	min-1	Oil-bath lubrication

Abutment and Fillet Dimensions

da (min.)	64	mm	Diameter of shaft abutment
da (max.)	72.5	mm	Diameter of shaft abutment
Da (max.)	111	mm	Diameter of housing abutment
ra (max.)	2	mm	Radius of shaft or housing fillet
Dx (min.)	0	mm	Diameter of snap ring recess in the housing
Cy (max.)	0	mm	Distance from outer ring side face to snap ring back face

Calculation factors

13.1

Factor

Additional information

z	8		Number of Balls
Dw	20.638	mm	Ball Diameter

Mass

Mass approx.

1.37

Mass approx.

CAD

FAQs (3)

Customer Questions

What are radial loads and axial loads?

Loads are defined by their direction. Loads perpendicular to the shaft are called radial loads and loads parallel to the shaft are called axial (thrust) loads.

How do deep groove ball bearings (DGBBs) differ from single-row angular contact ball bearings?

While DGBBs can handle axial loads in both directions, single-row angular contact ball bearings can only receive axial load in one direction.

What are the differences between open, sealed, and shielded deep groove ball bearings?

Seals and shields offer additional protection for bearing components and help to improve and maintain lubrication. In terms of sealing performance, sealed bearings rank best, followed by shielded bearings, then finally open bearings.
NSK uses supplementary designations D, DU, DW, and V (DD, DDU, DDW, VV) for sealed bearings and Z (ZZ) for shielded bearings. No supplementary designations are listed for open bearings.

Drawing for Reference

Designations	Basic Load Ratings		Radial Internal Clearance			Tolerance Class	Limiting Speeds		Number of Balls	Ball Diameter		Mass
Designations	Cr (N)	C0r (N)		min	max	Tolerance Class	Grease (min-1)	Oil (Oil-bath) (min-1)	Number of Balls	(mm)	(inch)	(kg)
6311	78500	44500				P0	6700	8000	8	20.638	0.813	1.37

Not to scale.
(*) The chamfer dimensions are minimum values.
6000N, 6000NR, 6001N, 6001NR : Snap ring groove dimensions and snap ring dimensions are not based on ISO 15.

More Information

More Information
NSK Product Type2	DGBB_SR
NSK Product Type	Bearing

Single-Row Deep Groove Ball Bearings

Single-Row Deep Groove Ball Bearings

Parts Number

Boundary Dimensions

Basic Load Ratings

Speeds

Abutment and Fillet Dimensions

Calculation factors

Additional information

Mass

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