6204 Ball Bearings | McMaster-Carr

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About Ball and Roller Bearings

Selecting Compatible Lead Screws and Nuts

Ball Bearings

Open bearings dissipate heat more efficiently than shielded and sealed bearings.

For technical drawings and 3-D models, click on a part number.

Open

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating	Specifications Met		Each
6204	20mm	47mm	14mm	Steel	3,050	1,450	22,000	Lubricated	-20° to 230°	ABEC-1	DIN 625-1	00000000	000000

Permanently Lubricated Ball Bearings

A solid polymer lubricant surrounds the balls, eliminating the need for additional lubrication. Because it's solid, the lubricant blocks out water and dust, extending the life of the bearing.

For technical drawings and 3-D models, click on a part number.

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Open
6204	20mm	47mm	14mm	Steel	2,450	1,350	8,900	Lubricated	10° to 200°	ABEC-1	00000000	000000

Stainless Steel Ball Bearings

Bearings are 440C stainless steel for good corrosion resistance.

Open bearings dissipate heat more efficiently than shielded and sealed bearings.

For technical drawings and 3-D models, click on a part number.

Open

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
6204	20mm	47mm	14mm	440C Stainless Steel	1,950	1,350	15,000	Lubricated	-40° to 240°	ABEC-1	00000000	000000

Permanently Lubricated Stainless Steel Ball Bearings

A solid polymer lubricant surrounds the balls, eliminating the need for additional lubrication. The solid lubricant blocks out water and dust, extending the life of the bearing.

For technical drawings and 3-D models, click on a part number.

Metric Bearings

					Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia., mm	For Housing ID, mm	Wd., mm	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Open
6204	20	47	14	440C Stainless Steel	2,200	1,350	9,000	Lubricated	-10° to 200°	ABEC-1	00000000	000000

Plastic Ball Bearings

These acetal bearings have good all-around corrosion and chemical resistance.

316 stainless steel balls have excellent corrosion resistance.

For technical drawings and 3-D models, click on a part number.

					Radial Load Cap., lbs.						316 Stainless Steel Ball
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	Ring Material	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Open
6204	20mm	47mm	14mm	Acetal Plastic	75	50	800	Not Required	-40° to 180°	Not Rated	0000000	000000

End Supports for Lead Screws and Ball Screws

A set of ball bearings reduces friction and secures the end of a ball or lead screw. Note: The end of your ball or lead screw must be machined before installing it into an end support.

For technical drawings and 3-D models, click on a part number.

For Radial Loads

End supports for radial loads handle loads perpendicular to the lead screw.

						Face Mounting Holes			Top Mounting Holes
ID	Ht.	Center Ht.	Wd.	Dp.	No. of Mounting Holes	Dia.	Ctr.-to-Ctr. Wd.	Ctr.-to-Ctr. Ht.	Dia.	Ctr.-to-Ctr. Wd.	Temperature Range, °F		Each
Alloy Steel
25/32"	2 3/4"	1 7/16"	4 1/2"	1 7/64"	6	15/32"	3 1/4"	1 3/4"	21/32"	3 1/4"	-40° to 210°	0000000	0000000

Shims for Ball Bearing Housings

Also called tolerance rings, these rings are for use in stamped, molded, or worn housings to form a tight hold on the bearings. They work like a spring, creating tension between the bearing and the housing to hold the bearing in place. They also reduce vibration and compensate for some thermal expansion between the housing and the bearing and eliminate the need for keys, pins, and adhesives. They're made of stainless steel for corrosion resistance.

For technical drawings and 3-D models, click on a part number.

For Bearing
Trade No.	OD	Wd.	Static Radial Load Capacity, lbs.	Bearing Mount Bore Dia.	Thick.	Corrugation Ht.	Misalignment Capability	Material	Minimum Hardness		Each
Metric
6204, 6303	47mm	14mm	1,400	48.86mm-48.97mm	0.203mm-0.508mm	0.749mm-1.25mm	0.5°	301 Stainless Steel	Rockwell C40	0000000	000000