2 1/8" Bearings | McMaster-Carr

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

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Maximum Rotation Speed

2,000 rpm

2,500 rpm

5,800 rpm

Dynamic Thrust Load Capacity

Less than 10,000 lb.

10,000 lb. to 19,999 lb.

Width

13 Products

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.

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.

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

				2 1/8"	8 1/2"	2 5/16"	25/32"	9,750	2,500	Steel	Sealed	2°	4451N34	000000

Needle-Roller Thrust Bearings


Bearings	Washers

Small but mighty, our thinnest rolling thrust bearings slot into tight spaces and spin at whirring speeds. Their long, slender rollers support thrust loads and reduce friction in everything from machine tool spindles to gearboxes.

A cage holds the rollers in place. You can install these bearings without washers between hardened, ground surfaces for the thinnest profile. If you’re working with unhardened, unground surfaces, you’ll need two washers for the rollers to run on. This three-piece design is easy to lubricate, but the oil will attract dust and grime since it’s exposed.

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

	Thrust Bearings									Thin Washers			Thick Washers
	For Shaft Dia.	OD	Thk.	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F		Each	Thk.		Each	Thk.		Each
Steel



		2 1/8"	2 7/8"	5/64"	Steel	5,450	5,800	0 to 240	5909K952	00000	1/32"	5909K972	00000	1/16"	5909K981	000000

Washers for Needle-Roller Thrust Bearings

Adapt needle-roller thrust bearings to use on unhardened, unground surfaces.

For Shaft Dia.	OD	Thk.	Washer Material		Each
2 1/8"	2 7/8"	1/32"	Steel	5909K972	00000
2 1/8"	2 7/8"	1/16"	Steel	5909K981	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



	2 1/8"	3 19/32"	13/16"	Steel	11,100	2,000	-40 to 245	60715K49	0000000

Dry-Running Metal-Reinforced Plastic Thrust Bearings

Combine naturally slippery PTFE with the strength of metal. These bearings don't need lubricant, so there's no oil to maintain, drip off, or attract dust. Backed with steel, they're as strong as other all-metal thrust bearings. However, they're best for dry environments since moisture will cause the steel to rust.

	OD	Thk.	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
Steel-Backed PTFE



	2 1/8"	3 1/8"	3/32"	17,100 lb. @ 30 rpm	-320 to 530	1262N38	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 2012

				2 1/8"	1 1/4"	1/2"	3/16"	8°	280	Machine Key, Set Screws	57095K196	0000000




						Bushing Trade Number 2517

						2 1/8"	1 3/4"	1/2"	1/4"	8°	430	Set Screws	57095K217	00000




								Bushing Trade Number 3020

								2 1/8"	2"	1/2"	1/4"	8°	800	Set Screws	57095K337	000000

Oil-Embedded Thrust Bearings

Our simplest-to-use thrust bearings, with no moving parts and no need to lubricate. Their porous surface releases oil over time, so you can install and forget them. While they run in most conditions, oil may drip away if temperatures climb too high. For extremely hot environments, consider graphite-lubricated bearings. All are fabricated, lubricated, and inspected in the U.S.

841 Bearing Bronze—A balance of strength and speed makes these bearings a good choice for most applications. Also known as SAE 841 bearing bronze.

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 if the bearing heats up.

	OD	Thk.	Dynamic Thrust Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	2 1/8"	4"	1/8"	14,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	5906K62	000000

Hub-Mount Screw-Clamp Bushings

Transfer torque directly from a shaft to a hub. These bushings install over your hub to mount a sprocket, pulley, or gear to a shaft at the same time. Common in industrial gearbox applications, they can also connect a hollow shaft over a solid shaft. As screw-clamp bushings, they're good for shock loads. When you tighten the included clamping screws, the outer rings compress against a sprocket, pulley, or gear in between them, causing the inner rings to tighten around the shaft.

	OD	Overall Wd.	Max. Torque, in·lbf	Fastener Tightening Torque, in·lbf		Each
Zinc-Plated Steel



	2 1/8"	3 15/16"	1 5/16"	12,150	100	7654N16	0000000

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"	1/2"	1/4"	360	Sintered Steel	Clamping Screws	2 1/8"	6086K635	000000




						Bushing Trade Number SK

						1 15/16"	1/2"	1/4"	180	Sintered Steel	Clamping Screws	2 1/8"	6086K532	00000