2 3/8" Bearings | McMaster-Carr

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Dynamic Radial Load Capacity

10,000 lb. to 19,999 lb.

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12 Products

Oil-Embedded Sleeve Bearings

Install and forget these self-lubricating bearings. All are made from porous metal and saturated with oil to reduce maintenance and downtime. A good all-around choice, they are used in everything from palm-sized fans in electronics to tire-sized pulleys. Although these bearings will work in most conditions, oil may drip away if temperatures get too high. Consider a graphite-lubricated bearing for higher temperatures or places where you can’t afford the mess. All are fabricated, lubricated, and inspected in the U.S.

With no moving parts, sleeve bearings are the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

841 Bearing Bronze—A classic choice for a starter pick. Also known as SAE 841 bearings.

Mineral Oil Base—Mineral oil consistently lubricates at most temperatures but doesn’t last as long as synthetic oil.

Synthetic Oil Base—A high-quality lubricant makes all the difference. Synthetic oil is less sensitive to temperature changes than mineral oil, so it won't get runny and leak away at higher temperatures.

	For Housing ID	Lg.	Dynamic Radial Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	2 3/8"	2 5/8"	1 1/4"	5,900 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K848	000000


	2 3/8"	2 5/8"	1 5/8"	7,700 lb. @ 30 rpm	Mineral Oil	10 to 220	6391K146	00000
	2 3/8"	2 3/4"	2"	9,500 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K849	00000
	2 3/8"	2 3/4"	2 1/2"	11,850 lb. @ 30 rpm	Mineral Oil	10 to 220	6391K889	00000
	2 3/8"	2 3/4"	3"	14,250 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K851	00000

Quick-Mount Ball Bearings

Set-Screw

Shaft Mount

Slip onto a shaft and secure with the turn of a screw. You don't need any special tools to mount these bearings.

Set-Screw Shaft Mount—Tighten the screws against the shaft to hold the bearing in place. For high-speed applications, consider clamp-on shaft mounts, which are less likely to slip.

Black-Oxide Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

Sealed—The best choice for dirty environments. A barrier seals out dust so it won't gunk up or wear down the balls. However, these bearings retain the most heat since air can't flow through.

ABEC Rating—Bearings with an ABEC rating meet industry tolerance standards established by the Annular Bearing Engineers Committee (ABEC). They're rated on a scale from 1 to 9. The higher the rating, the tighter the tolerance. Bearings rated ABEC 1 or 3 are precise enough for most applications. If your application consistently runs at high speeds or requires high accuracy, consider bearings rated ABEC 5 or higher, since they generate less friction and heat.

				Retaining Ring						Temp. Range, ° F
	For Shaft Dia.	For Housing ID	Wd.	OD	Thk.	Bearing Seal Type	ABEC Rating	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Min.	Max.	Bearing Trade No.		Each
Set-Screw Shaft Mount







				Black-Oxide Steel

				2 3/8"	4 21/64"	1 1/4"	4 37/64"	0.094"	Sealed	1	11,750	3,000	-20	220	ER38	8090T42	0000000

High-Misalignment Tire Couplings

With a large, flexible rubber tire, these withstand the highest misalignment of any coupling while reducing vibration. For a complete coupling, select two hubs, one tire, and two bushings. Choose components of the same trade size to ensure they'll fit together.

Hubs

The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.

Iron and Steel Hub—Best for dry environments, since moisture will cause these hubs to rust.

Clamp-On Shaft Mount—Grip shafts evenly without marring them and hold tighter than set screws. Tighten the clamping screws to secure.

	Hubs						Quick-Disconnect Bushings
	OD	Shaft Coupling Trade Size	Overall Lg.	Shaft Mount Type		Each	Bushing Trade No.	Choose a Shaft Diameter		Each
Iron and Steel Hub



		9 1/4"	L190	5 11/16"	Clamp On	6241K15	0000000	SK	1/2", 5/8", 3/4", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 1 7/16", 1 1/2", 1 9/16", 1 5/8", 1 11/16", 1 3/4", 1 7/8", 1 15/16", 2", 2 1/8", 2 3/16", 2 1/4", 2 3/8", 2 7/16", 2 1/2", 2 5/8"	6086K15	000000

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing trade number. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.

			Keyway
	For Shaft Dia.	Overall Wd.	Wd.	Dp.	Taper	Fastener Tightening Torque, in·lbf	Includes		Each
Steel







				Bushing Trade Number 2517

				2 3/8"	1 3/4"	5/8"	3/16"	8°	430	Machine Key, Set Screws	57095K219	000000




						Bushing Trade Number 3020

						2 3/8"	2"	5/8"	5/16"	8°	800	Set Screws	57095K344	000000

Quick-Disconnect (QD) Bushings


Clamp-On Shaft Mount

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

		Keyway
	Overall Wd.	Wd.	Dp.	Fastener Tightening Torque, in·lbf	Material	Includes	For Shaft Dia.		Each
Clamp-On Shaft Mount







				Bushing Trade Number SF

				2 1/16"	5/8"	3/16"	360	Sintered Steel	Clamping Screws, Machine Key	2 3/8"	6086K864	000000




						Bushing Trade Number SK

						1 15/16"	5/8"	1/16"	180	Sintered Cast Iron	Clamping Screws, Machine Key	2 3/8"	6086K861	00000