1 7/8" Bearings | McMaster-Carr

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19 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



	1 7/8"	2 1/4"	3/4"	2,800 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K828	000000


	1 7/8"	2 1/4"	2"	7,500 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K681	00000
	1 7/8"	2 1/4"	2 1/2"	9,350 lb. @ 30 rpm	Synthetic Oil	-35 to 300	6391K491	00000
	1 7/8"	2 1/4"	3"	11,250 lb. @ 30 rpm	Mineral Oil	10 to 220	6391K882	00000

Mounted Ball Bearings

Smoother than smooth—the balls inside these bearings roll nearly friction-free. The sturdy housing bolts down to support shafts as they turn.

Lubricate regularly to keep your bearing in tip-top shape. Bearings with seals and shields keep lubricants in and contaminants out, and come packed with grease. Open bearings require initial lubrication and offer less protection against dust and debris.

Powder-Coated Cast Iron Housing—A rugged iron base coated in thick powder that protects against water, mild detergents, and oil. However, if the coating is scratched or chipped, the underlying iron may rust.

Nickel-Plated Cast Iron Housing—Combine the strength of iron with the corrosion resistance of stainless steel at an affordable price point. Nickel-plated iron is also unlikely to chip.

Set Screw—Turn the screw to lock your shaft in place. A simple, reliable choice, set screws grip tightly, but they can mar shaft surfaces.

Sealmaster—Famous for exceptional sealing, Sealmaster bearings include a signature three-part seal in the inner ring. This design blocks out gritty debris and purges old grease to extend the life of the bearing.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

			Overall
	For Shaft Dia.	Ctr. Ht.	Lg.	Wd.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability	Manufacturer		Each
Powder-Coated Cast Iron Housing







				Set Screw

				1 7/8"	2 1/4"	8 1/8"	2 15/32"	7,850	3,500	Steel	Sealed	2°	Sealmaster	7728T75	0000000


				Nickel-Plated Cast Iron Housing







								Set Screw

								1 7/8"	2 1/4"	8 1/8"	2 15/32"	7,850	2,500	Steel	Sealed	2°	McMaster-Carr Approved	6494K79	00000

One-Piece Thrust Ball Bearings

No need to assemble cages and washers—these thrust ball bearings come as one piece for easy installation. The balls spin inside a raceway instead of a cage, so there's room for more balls to support higher loads than three-piece bearings. An outer band holds the balls inside the raceway, keeping lubricant in and dirt out.

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

	OD	Thk.	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F		Each
Steel



	1 7/8"	3 7/32"	13/16"	Steel	10,800	2,200	-40 to 245	60715K33	000000

Easy-Adjust Mounted Ball Bearings with Two-Bolt Flange

Change the position of your bearing without having to remove your shaft. Just loosen the bolt in the elongated mounting hole for quick adjustments. The housing mounts in place with a two-bolt flange, the most common type of flanged bearing. Inside, the balls roll nearly friction-free to support smooth rotation.

Lubricate regularly to keep your bearings in tip-top shape. These bearings come packed with grease and sealed to block out dust and contaminants.

Set Screw—Turn the screw to lock your shaft in place. A simple, reliable choice, set screws grip tightly, but they can mar shaft surfaces.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

		Overall
	For Shaft Dia.	Lg.	Wd.	Flange Thk.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability		Each
Powder-Coated Cast Iron Housing







				Set Screw

				1 7/8"	7 7/16"	2 5/32"	9/16"	7,850	2,500	Steel	Sealed	2°	4451N31	000000

Extra-Clearance Mounted Ball Bearings

Good for bulky setups, the tall design doubles the clearance between the shaft and the mounting surface. The balls roll nearly friction-free within a sturdy housing to support smooth rotation.

Lubricate regularly to keep your bearings in tip-top shape. These bearings come packed with grease and sealed to block out dust and contaminants.

Set Screw—Turn the screw to lock your shaft in place. A simple, reliable choice, set screws grip tightly, but they can mar shaft surfaces.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

			Overall
	For Shaft Dia.	Ctr. Ht.	Lg.	Wd.	Dynamic Radial Load Cap., lb.	Max. Rotation Speed, rpm	Bearing Material	Bearing Seal Type	Misalignment Capability		Each
Powder-Coated Cast Iron Housing







				Set Screw

				1 7/8"	4 21/64"	8 1/8"	2 3/4"	7,850	2,500	Steel	Sealed	2°	4453N31	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 SD

				1 13/16"	1/2"	1/16"	108	Sintered Cast Iron	Clamping Screws, Machine Key	1 7/8"	6086K857	000000




						Bushing Trade Number SDS

						1 3/8"	1/2"	1/16"	108	Sintered Cast Iron	Clamping Screws, Machine Key	1 7/8"	6086K853	00000




								Bushing Trade Number SF

								2 1/16"	1/2"	1/4"	360	Sintered Steel	Clamping Screws	1 7/8"	6086K632	00000




										Bushing Trade Number SK

										1 15/16"	1/2"	1/4"	180	Sintered Steel	Clamping Screws	1 7/8"	6086K528	00000

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 2012

				1 7/8"	1 1/4"	1/2"	1/4"	8°	280	Set Screws	57095K192	000000




						Bushing Trade Number 2517

						1 7/8"	1 3/4"	1/2"	1/4"	8°	430	Set Screws	57095K228	00000




								Bushing Trade Number 3020

								1 7/8"	2"	1/2"	1/4"	8°	800	Set Screws	57095K329	00000


								Cast Iron







												Bushing Trade Number 3030

												1 7/8"	3"	1/2"	1/4"	8°	800	Set Screws	57095K649	000000




														Bushing Trade Number 3535

														1 7/8"	3 1/2"	1/2"	1/4"	8°	1,000	Set Screws	57095K379	000000

Split-Tapered Bushings

Steel

The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings. They're for use with split-tapered 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.

Machine Key—Bushings with a machine key fit into a matching keyway on a sprocket or pulley for high-torque applications.

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







				Bushing Trade Number Q1 with Clamping Screws, Machine Key

				1 7/8"	2 1/2"	1/2"	1/4"	3°	348	9859T612	000000