6921NR Series

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

Skip to the beginning of the images gallery

Images shown are representations. Designs and specifications may differ from actual products.

Radial Internal Clearance

Tolerance

Grouped product items
Parts Number
6921NRC3 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRCM Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NR Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC2 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC2P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC2P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC3P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC3P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC4 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC4P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC4P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC5P5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRC5P6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRCMP5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRCMP6 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRP5 Single-Row Deep Groove Ball Bearings			Add to Compare You can use this service by registering as a member.
6921NRP6 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

6921NR

Boundary Dimensions

d	105	mm	Bore diameter
D	145	mm	Outside diameter
B	20	mm	Width
r (min.)	1.1	mm	Chamfer dimension

Basic Load Ratings

C_r	46500	N	Basic dynamic load rating
C_0r	42000	N	Basic static load rating

Speeds

Grease	4300	min^-1	Grease lubrication
Oil (Oil-bath)	5300	min^-1	Oil-bath lubrication

Dimensions

D2 (max.)	150.7	mm	Outside diameter of snap ring
f (max.)	1.7	mm	Width of snap ring
a (min.)	3.3	mm	Distance outer ring from side face to snap ring groove
b (min.)	1.9	mm	Width of snap ring groove
D1 (max.)	142.6	mm	Diameter of snap ring groove
ro (max.)	0.6	mm	Bottom radius of snap ring groove
rN	0.5	mm	Chamfer dimension

Abutment and Fillet Dimensions

da (min.)	111.5	mm	Diameter of shaft abutment
da (max.)	116	mm	Diameter of shaft abutment
Da (max.)	138.5	mm	Diameter of housing abutment
ra (max.)	1	mm	Radius of shaft or housing fillet
Dx (min.)	152	mm	Diameter of snap ring recess in the housing
Cy (max.)	4.7	mm	Distance from outer ring side face to snap ring back face

Calculation factors

16.5

Factor

Additional information

z	18		Number of Balls
Dw	11.906	mm	Ball Diameter

Mass

(approx.)

0.856

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)
6921NR	46500	42000					4300	5300	18	11.906	0.469	0.856

You can use this service by registering as a member.

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	6921NR