ER204 Bearings | McMaster-Carr

Slip these bearings onto a shaft and secure with the included set screws, no special tools required. All have an extended inner ring for additional shaft support.

Bearings with a black-oxide steel ring have some corrosion resistance.

Sealed bearings block out dust and other contaminants better than shielded bearings.

Bearings with a retaining ring have a removable retaining ring that holds the bearing inside a housing.

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

				Inner Ring		Retaining Ring		Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	OD	Wd.	OD	Thick.	Dynamic	Static	Max. Speed, rpm	Temp. Range, °F	ABEC Rating		Each
Sealed (Lubricated)
Black-Oxide Steel—With Retaining Ring
ER204	20mm	47mm	15.9mm	30.2mm	31mm	52.4mm	1.2mm	2,600	1,400	7,300	-20° to 220°	ABEC-1	0000000	000000

Clamp-On Collar Ball Bearings

Quickly secure these bearings onto shafts with the clamp-on collar for a concentric, mar-free hold. Tighten the single screw on the locking collar around its inner ring on your shaft to center and secure the shaft in the bearing bore. The collar’s firm grip reduces vibration and noise in your system. The steel rings on these bearings have a black-oxide finish for some corrosion resistance.

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

				Inner Ring		Retaining Ring		Radial Load Cap., lbs.
Bearing Trade Number	For Shaft Dia.	For Housing ID	Wd.	OD	Wd.	OD	Thick.	Dynamic	Static	Max. Speed, rpm	Lubrication	Temp. Range, °F	ABEC Rating		Each
Shielded
Black-Oxide Steel Ring
ER204	20mm	47mm	16mm	30mm	31mm	52mm	1.2mm	2,600	1,400	6,450	Lubricated	-20° to 220°	ABEC-1	0000000	000000

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