6303NR Series

Single-Row Deep Groove Ball Bearings, With a Snap Ring

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Radial Internal Clearance

Tolerance

Grouped product items
Parts Number
6303NRC3 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRCM Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NR Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC2 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC2P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC2P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC3P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC3P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC4 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC4P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC4P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC5P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRC5P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRCMP5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRCMP6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRP5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6303NRP6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Display units Metric Imperial

Designations

6303NR

Boundary Dimensions

d	17	mm	Bore diameter
D	47	mm	Outside diameter
B	14	mm	Width
r (min.)	1	mm	Chamfer dimension

Basic Load Ratings

C_r	15000	N	Basic dynamic load rating
C_0r	6650	N	Basic static load rating

Speeds

Grease	17000	min^-1	Grease lubrication
Oil (Oil-bath)	20000	min^-1	Oil-bath lubrication

Dimensions

D2 (max.)	52.7	mm	Outside diameter of snap ring
f (max.)	1.12	mm	Width of snap ring
a (min.)	2.46	mm	Distance outer ring from side face to snap ring groove
b (min.)	1.35	mm	Width of snap ring groove
D1 (max.)	44.6	mm	Diameter of snap ring groove
ro (max.)	0.4	mm	Bottom radius of snap ring groove
rN	0.5	mm	Chamfer dimension

Abutment and Fillet Dimensions

da (min.)	22	mm	Diameter of shaft abutment
da (max.)	25.5	mm	Diameter of shaft abutment
Da (max.)	42	mm	Diameter of housing abutment
ra (max.)	1	mm	Radius of shaft or housing fillet
Dx (min.)	53.5	mm	Diameter of snap ring recess in the housing
Cy (max.)	3.3	mm	Distance from outer ring side face to snap ring back face

Calculation factors

12.4

Factor

Additional information

z	7		Number of Balls
Dw	8.731	mm	Ball Diameter

Mass

(approx.)

0.113

Drawing for Reference

Designations	Basic Load Ratings		Radial Internal Clearance			Tolerance Class	Limiting Speeds		Number of Balls	Ball Diameter		Mass
Designations	C_r (N)	C_0r (N)		min	max	Tolerance Class	Grease (min^-1)	Oil (Oil-bath) (min^-1)	Number of Balls	(mm)	(inch)	(approx.) (kg)
6303NR	15000	6650					17000	20000	7	8.731	0.344	0.113

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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.

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.

More Information

More Information
NSK Product Type2	DGBB_SR_NR
NSK Product Type	Bearing
Designations	6303NR