6304, 6304-2Z, 6304-2RS Ball Bearing, ISO 15

The 6304 ball bearing (ISO 15) has a 20 mm bore, a 52 mm outside diameter and a width of 15 mm. Get it as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 6304 bearing, 6304-2Z bearing, 6304-2RS bearing
• Model id: iso15-6304
• Standard: ISO 15 · size 6304

Versions

Designation	What differs	Part key	Simplified
6304	open	iso15-6304	STEP
6304-2Z	2Z (shielded)	iso15-6304-2z	STEP
6304-2RS	2RS (sealed)	iso15-6304-2rs	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		20		20	nominal	L1
D	Outside diameter		52		52	nominal	L1
B	Width		15		15	nominal	L1
r	Chamfer dimension	1.1			1.1	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-ISO15-SZ-6304.pdf.

Load ratings and speeds

What NSK's web catalogue (nsk-dgbb) lists for its open bearing of this designation. Limiting speeds are for the open bearing; a shielded or sealed bearing has its own, lower ones.

• Basic Load Ratings, Cr: 17500 N
• Basic Load Ratings, C0r: 7900 N
• Limiting Speeds, Grease: 16000 min-1
• Limiting Speeds, Oil (Oil-bath): 19000 min-1

The 6304 ball bearing beside the 6204 and the 60/22

The 6304 is number 53 of the 71 ISO 15 ball bearings published here, listed from 693 to 6306.

• Bore diameter (d): 20 mm on the 6304 ball bearing, against 20 mm on the 6204 and 22 mm on the 60/22.
• Outside diameter (D): 52 mm on the 6304 ball bearing, against 47 mm on the 6204 and 44 mm on the 60/22.
• Width (B): 15 mm on the 6304 ball bearing, against 14 mm on the 6204 and 12 mm on the 60/22.
• Chamfer dimension (r): at least 1.1 mm on the 6304 ball bearing, against at least 1 mm on the 6204 and at least 0.6 mm on the 60/22.

Other sizes

• One size smaller: 6204 Ball Bearing, ISO 15, 20 mm bore, 47 mm OD, 14 mm wide.
• One size larger: 60/22 Ball Bearing, ISO 15, 22 mm bore, 44 mm OD, 12 mm wide.

Documents

• CC-ISO15-DS-6304.pdf: 6304 datasheet: values with levels, sources
• CC-ISO15-SZ-6304.pdf: 6304 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

nsk-dgbb, ntn-bearingfinder-dgbb, skf-17000-dgbb. Full citations: the method page and this size's datasheet.

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