Description

NTN6304

Radial/Deep Groove Ball Bearing - Round Bore, 20 mm ID, 52 mm OD, 15 mm Width, Open, CN Internal Clearance

Bore Type	Round
Bore Diameter	20.000 mm, 0.7874 in
Outside Diameter	52.000 mm, 2.0472 in
Overall Width	15.000 mm, 0.5906 in
Closure Type	Open
Row Type & Fill Slot	Single Row Non-Fill Slot
Snap Ring Included	Without Snap Ring
Internal Clearance	CN
Operating Temperature Range	-40 to 250 ºF
Cage Type	Pressed
Dynamic Load Capacity	3950 lbf
Static Load Capacity	1770 lbf
Precision Rating	Class 0
Seal Type	None
Finish/Coating	Uncoated
Bearing Material	High Carbon Chrome Steel
Cage Material	Steel
Inner Ring Width	15.000 mm, 0.5906 in
Outer Ring Width	0.5906 in; 15.000 mm
Maximum RPM (Grease)	14000 RPM
Maximum RPM (Oil)	17000 rpm
Fillet Radius	1.100 mm, 0.0433 in
Maximum RPM	17000 RPM
Manufacturer UPC Number	4547359005394
Weight	0.32 lbs

1. Design features and characteristics

Deep groove ball bearings are very widely used. A deep groove is formed on the inner and outer ring of the bearing enabling the bearing to sustain radial and axial loads in either direction as well as the complex loads which result from the combination of these forces. Deep groove ball bearings are suitable for high speed applications. When two or more deep groove ball bearings are used in combination and mounted adjacent to each other a duplex set (D2) should be used. Duplex bearings (D2) utilize controlled tolerances to more evenly distribute the loading between the individual bearing rows which improves the overall performance of the assembly. In addition to unsealed and unlubricated “open” bearings, NTN provides deep groove ball bearings that are pre-lubricated with grease and enclosed by seals or shields. See section “11. Lubrication” for a list of some of the greases which can be used. Table 1 shows the construction and special characteristics of various sealed deep groove ball bearings.

Types and codes N	Shielded type	Shielded type
Types and codes N	Non-contact type ZZ	Non-contact type LLB	Contact type LLU	Low torque type LLH
Construction
Construction	Metal shield plate is affixed to the outside ring; the inner ring incorporates a V-groove and labyrinth clearance.	The outer ring incorporates synthetic rubber molded to a steel plate; seal edge is aligned with V-groove along inner ring surface with labyrinth clearance	The outer ring incorporates synthetic rubber molded to a steel plate; seal edge contacts V-groove along inner ring surface	Basic construction is the same as LLU type, but a specially designed lip on the edge of the seal prevents foreign matter penetration; low torque construction.
Torque	Small	Small	Higher	Medium
Dust proofing	Good	Better than ZZ-type	Excellent	Much better than LLB-type
Water proofing	Poor	Poor	Very good	Good
High speed capacity	Same as open type	Same as open type	Limited by contact seals	Much better than LLU-type
Allowable temp. range	Depends on lubricant	−25 to 120°C	−25 to 110°C	−25 to 120°C

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NTN6304 Radial/Deep Groove Ball Bearing - Round Bore, 20 mm ID, 52 mm OD, 15 mm Width, Open, CN Internal... Read more

SKU: 6304

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Description

NTN6304

Radial/Deep Groove Ball Bearing - Round Bore, 20 mm ID, 52 mm OD, 15 mm Width, Open, CN Internal Clearance

Bore Type	Round
Bore Diameter	20.000 mm, 0.7874 in
Outside Diameter	52.000 mm, 2.0472 in
Overall Width	15.000 mm, 0.5906 in
Closure Type	Open
Row Type & Fill Slot	Single Row Non-Fill Slot
Snap Ring Included	Without Snap Ring
Internal Clearance	CN
Operating Temperature Range	-40 to 250 ºF
Cage Type	Pressed
Dynamic Load Capacity	3950 lbf
Static Load Capacity	1770 lbf
Precision Rating	Class 0
Seal Type	None
Finish/Coating	Uncoated
Bearing Material	High Carbon Chrome Steel
Cage Material	Steel
Inner Ring Width	15.000 mm, 0.5906 in
Outer Ring Width	0.5906 in; 15.000 mm
Maximum RPM (Grease)	14000 RPM
Maximum RPM (Oil)	17000 rpm
Fillet Radius	1.100 mm, 0.0433 in
Maximum RPM	17000 RPM
Manufacturer UPC Number	4547359005394
Weight	0.32 lbs

1. Design features and characteristics

Deep groove ball bearings are very widely used. A deep groove is formed on the inner and outer ring of the bearing enabling the bearing to sustain radial and axial loads in either direction as well as the complex loads which result from the combination of these forces. Deep groove ball bearings are suitable for high speed applications. When two or more deep groove ball bearings are used in combination and mounted adjacent to each other a duplex set (D2) should be used. Duplex bearings (D2) utilize controlled tolerances to more evenly distribute the loading between the individual bearing rows which improves the overall performance of the assembly. In addition to unsealed and unlubricated “open” bearings, NTN provides deep groove ball bearings that are pre-lubricated with grease and enclosed by seals or shields. See section “11. Lubrication” for a list of some of the greases which can be used. Table 1 shows the construction and special characteristics of various sealed deep groove ball bearings.

Types and codes N	Shielded type	Shielded type
Types and codes N	Non-contact type ZZ	Non-contact type LLB	Contact type LLU	Low torque type LLH
Construction
Construction	Metal shield plate is affixed to the outside ring; the inner ring incorporates a V-groove and labyrinth clearance.	The outer ring incorporates synthetic rubber molded to a steel plate; seal edge is aligned with V-groove along inner ring surface with labyrinth clearance	The outer ring incorporates synthetic rubber molded to a steel plate; seal edge contacts V-groove along inner ring surface	Basic construction is the same as LLU type, but a specially designed lip on the edge of the seal prevents foreign matter penetration; low torque construction.
Torque	Small	Small	Higher	Medium
Dust proofing	Good	Better than ZZ-type	Excellent	Much better than LLB-type
Water proofing	Poor	Poor	Very good	Good
High speed capacity	Same as open type	Same as open type	Limited by contact seals	Much better than LLU-type
Allowable temp. range	Depends on lubricant	−25 to 120°C	−25 to 110°C	−25 to 120°C

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NTN Deep Groove Ball Bearings 6304, D=20

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