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

Compact-Base Mounted Ball Bearings

Concentric Lock Shaft Mount

Also known as tapped-base bearings, these ball bearings mount to surfaces from the bottom through threaded holes. Because of their narrow profile, they’re commonly used in tight-clearance spaces, including systems where multiple shafts are mounted close together.

Concentric lock shaft-mount bearings have a locking collar that centers and secures the shaft in the bearing bore. To install these bearings, tighten the single screw on the locking collar around its inner ring on your shaft. Their firm grip on shafts reduces vibration for quieter operation.

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

		Overall			Mounting Hole				Radial Load Cap., lbs.
For Shaft Dia.	Center Ht.	Ht.	Lg.	Wd.	Thread Size	Thread Pitch	Dp.	Ctr.-to-Ctr.	Dynamic	Static	Max. Speed, rpm	Temp. Range, °F	Alignment Style	Lubrication		Each
Sealed Steel Bearings with Cast Iron Housing
Shaft Mount Type: Concentric Lock
20mm	33.3mm	65.1mm	79.4mm	38.1mm	M10	1.5 mm	11mm	52mm	2,610	1,440	6,450	-20° to 220°	Self Aligning	Lubricated	00000000	0000000

2 Products

About Ball and Roller Bearings

Clamp-On Collar Ball Bearings

Compact-Base Mounted Ball Bearings