Bushings for 2 3/8" Shafts

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Flexible Shaft Couplings

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Sleeve Bearings

System of Measurement

Shaft Diameter

6.000 mm to 10.000 mm

6.000 mm to 12.000 mm

6.000 mm to 16.000 mm

6.000 mm to 20.000 mm

7 mm

8 mm

9 mm

9.500 mm to 25.000 mm

9.500 mm to 30.000 mm

9.500 mm to 35.000 mm

12.500 mm to 40.000 mm

Shaft Type

Length

Material

Bushing Trade Number

Keyway Width

Plain Bearing Type

Bearing Type

Shaft Mount Type

For Housing ID

Number of Teeth

Dynamic Radial Load Capacity @ Speed

Construction

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

Width

DFARS Specialty Metals

Exempt

RoHS

Compliant

Not Compliant

Export Control Classification Number (ECCN)

REACH

Keyway Depth

Roller Chain Trade Number

60-2

Bushing Type

Quick Disconnect (QD)

Performance

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63 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-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

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

High-Torque Spider Couplings

With a thick split spider in the center, these transmit higher torque than standard split spider couplings. Connect them to pumps, mixers, and other equipment that generates heavy torque. The spider also prevents metal-to-metal contact between the hubs, so there's no need for lubrication. For a complete coupling, select two hubs, one split spider, and one split spider cover. Choose components with 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.

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

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

	Shaft Mount Type	For Shaft Diameter		Each
Keyed







	Steel

	3 33/64"	QF50	6 1/16"	Set Screw	2 3/8"	3565N9	0000000

Split Spiders

Unlike standard spiders, you can install these without using tools, removing hubs, or realigning shafts. Hold them in place with a retaining ring.

Urethane Rubber—Tough, with plastic-like tear resistance. Higher-durometer spiders are more rigid for more precise positioning, but they absorb less vibration.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	Temp. Range, ° F		Each
Durometer 48D (Medium Soft) Urethane Rubber



		3 33/64"	QF50	6,000	7,065	0.038"	2°	0.116"	-60 to 212	3565N51	000000


		Durometer 60D (Medium) Urethane Rubber



				3 33/64"	QF50	6,000	14,000	0.038"	2°	0.116"	-60 to 212	3565N53	00000


				3 33/64"	QF50	6,000	14,000	0.038"	2°	0.116"	-60 to 350	3565N52	000000

Split Spider Covers

Hold split spiders in place to secure the two hubs.

Steel—Best for dry environments, since moisture will cause these covers to rust.

	For Hub OD		Each
Steel



	QF50	3 33/64"	3565N64	0000000

Spider Couplings

With two hubs gripping a rubbery spider in the center, these couplings damp vibration and transfer torque while flexing to handle misaligned shafts. The metal hubs never touch each other, so there's no need for lubrication. Also known as Lovejoy® couplings. For a complete coupling, select two hubs and one spider or two hubs, one split spider, and one retaining ring. Choose components with 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.

Keyed—Mount onto shafts with a matching keyway.

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

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

	Shaft Mount Type	For Shaft Diameter		Each
Keyed







	Iron

	5"	L225	5 11/32"	Set Screw	2 3/8"	6408K22	0000000

Spiders

A flexible center fits between hubs to enable torque transfer and damp vibration.

Buna-N—Best choice for vibration damping and shock absorption with the lowest stiffness and good tear resistance.

Hytrel—Most direct torque transfer with the highest stiffness and least vibration damping.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular		Each
Buna-N



		5", 127 mm	L225	4,200	2,340	0.015"	1°	6408K62	000000


		Hytrel



				5", 127 mm	L225	4,200	6,225	0.015"	0.5°	6408K64	000000

High-Torque Chain Couplings

A rugged roller chain locks onto teeth on the hubs to withstand high torque. Often found in conveyors, mixers, and crushers, these couplings also compensate for high angular misalignment. Lubricate to maintain smooth motion. For a complete coupling, select two hubs and one roller chain. 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.

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

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

Optional Nylon Covers—Withstand grease lubricant and protect hubs from abrasion and corrosion.

Hubs								Optional Nylon Covers
OD	Shaft Coupling Trade Size	Overall Lg.	For Shaft Type	Shaft Mount Type	For Shaft Diameter		Each	OD		Each







			Steel

			5"	6018	3 29/64"	Keyed	Set Screw	2 3/8"	6407K44	000000	6 3/8"	6407K74	0000000

Roller Chain

Lock onto teeth on the hubs to transmit high torque.

Steel—Best for dry environments, since moisture will cause this roller chain to rust.

					Misalignment Capability		Roller Chain
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Trade No.	Standard		Each
Steel



		5"	6018	3,000	10,900	0.012"	1.5°	60-2	ANSI	6407K54	000000

Set Screw Two-Piece Shaft Collars

Attach these traditional collars anywhere along a shaft when other components are already installed or you can't access the ends. Their set screw digs into the shaft for a tight, permanent hold, but one that leaves a gouge. For maximum holding power, make sure the set screw is harder than the shaft.

Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.

				Set Screw		Clamping Screw			Each
	For Shaft Dia.	OD	Wd.	Type	No. Included	Type	No. Included		1-24	25-Up
Black-Oxide Carbon Steel



		2 3/8"	3 1/2"	3/4"	Hex Socket	1	Socket Head	2	1069N76	000000	000000

High-Axial-Misalignment Sleeve Couplings

Flex to handle axial misalignment with the gear-shaped sleeve while transmitting high torque at high speeds. The flexible sleeve between the hubs reduces vibration, absorbs shock, and prevents metal-to-metal contact, so there's no need for lubrication. For a complete coupling, select two hubs and one sleeve. Choose components with 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.

Cast Iron—Strong and rigid to withstand heavy loads. Keep these hubs dry to prevent rust.

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

	Shaft Coupling Trade Size	Overall Lg.	Shaft Mount Type	For Shaft Diameter		Each
Cast Iron



	5 29/64"	8S	4 7/16"	Set Screw	2 3/8"	6507K12	000000


	6 23/64"	9S	5 1/16"	Set Screw	2 3/8"	6507K7	000000
	7 1/2"	10S	5 11/16"	Set Screw	2 3/8"	6507K8	000000
	8 5/8"	11S	7 1/8"	Set Screw	2 3/8"	6507K9	000000

Sleeves

Install these flexible, cylindrical sleeves between the hubs.

TPE—Flexible rubber that resists water and outdoor conditions.

EPDM—Flexible rubber that damps vibration.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial		Each
TPE



		5 29/64"	8S	4,500	1,135	0.02"	1°	0.125"	6507K75	000000


		6 23/64"	9S	3,750	1,800	0.025"	1°	0.125"	6507K76	00000
		7 1/2"	10S	3,600	2,875	0.025"	1°	0.125"	6507K77	000000


		EPDM



				8 5/8"	11S	3,600	4,530	0.032"	1°	0.125"	6507K78	000000

Set Screw Shaft Collars

Slide these traditional collars from one end of the shaft and tighten the set screw. They dig into the shaft for a secure hold, but one that leaves a gouge. For maximum holding power, make sure the set screw is harder than the shaft.

Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.

Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.

303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.

316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.

Aluminum—One-third the weight of steel and corrosion resistant.

				Set Screw
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each
Black-Oxide Carbon Steel



		2 3/8"	3 1/4"	15/16"	Hex Socket	1	9414T43	000000


		Zinc-Plated Carbon Steel



				2 3/8"	3 1/4"	15/16"	Hex Socket	1	6432K55	00000


				303 Stainless Steel



						2 3/8"	3 1/4"	15/16"	Hex Socket	1	6462K55	000000


						316 Stainless Steel



								2 3/8"	3 1/4"	15/16"	Hex Socket	1	9943K53	000000


								Aluminum



										2 3/8"	3 1/4"	15/16"	Hex Socket	1	9946K55	00000

Quick-Release Shaft Collars with Lever

Flip the lever to install, reposition, and remove these collars. They clamp firmly and evenly without marring your shaft.

Black Anodized Aluminum—One-third the weight of steel and more corrosion resistant than unfinished aluminum.

				Clamping Screw
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each
Black Anodized Aluminum



		2 3/8"	4 3/4"	3/4"	Socket Head	1	1511K249	0000000

Shaft Grounding Rings

Shaft Grounding Ring Shown

Installed

One Piece

Two Piece

Prevent motor downtime by protecting bearings from stray currents generated by variable frequency drives. These grounding rings create a path for stray currents, so they won't damage bearing surfaces. Use them on AC motors.

One Piece—One-piece rings slide on from the end of the shaft.

Two Piece—Two-piece rings simplify installation when motors are connected to equipment.

					One Piece		Two Piece
	For Shaft Dia.	For Motor Frame Size	Mounting Hardware Included	Includes		Each		Each
Aluminum



		2 3/8"	NEMA 364T, NEMA 365T, NEMA 444TS, NEMA 445TS, NEMA 447TS, NEMA 449TS	Yes	16 Brackets (4 each of 4 Common Styles)	4805N18	0000000	4805N29	0000000

Accessories for Grounding Rings

Conductive Adhesives

Image of Product. Front orientation. Grounding Rings.

Use adhesives to install rings without having to drill or tap into motor frames.

Container
Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Mix Ratio		Each
0.5	Adhesive	10	24	1:1	4805N33	0000000

Conductive Coatings

Apply conductive coatings to motor shafts before installing the rings to improve the conductivity of the steel shaft surface that touches the grounding ring.

Container		Dry Time
Size, fl. oz.	Type	Touch, min.	Overall, hr.	Max. Temp., ° F	Application Temp., ° F	Color		Each
0.5	Bottle	30	24	330	72 to 300	Gray	4805N34	0000000

Two-Piece Shaft Collars

For Round Shafts

For Keyed Shafts

Attach these collars anywhere along your shaft, which helps when other components are already installed or you can't access the end. They clamp firmly and evenly without marring the shaft, so you can reposition or remove collars later.

Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.

Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.

Chrome-Plated Carbon Steel—Resist moisture and mild cleaning solutions better than zinc-plated collars.

303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.

316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.

Aluminum—One-third the weight of steel and corrosion resistant.

						For Round Shafts		For Keyed Shafts
				Clamping Screw				Keyway
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each	Wd.	Dp.		Each
Black-Oxide Carbon Steel



		2 3/8"	3 1/2"	3/4"	Socket Head	2	6436K79	000000	5/8"	9/32"	3357K46	000000


		Zinc-Plated Carbon Steel



				2 3/8"	3 1/2"	3/4"	Socket Head	2	2380K51	00000	—	—	———	0


				Chrome-Plated Carbon Steel



						2 3/8"	3 1/2"	3/4"	Socket Head	2	3370K92	00000	—	—	———	0


						303 Stainless Steel



								2 3/8"	3 1/2"	3/4"	Socket Head	2	6436K109	00000	5/8"	9/32"	3329K45	000000


								316 Stainless Steel



										2 3/8"	3 1/2"	3/4"	Socket Head	2	9633T44	000000	—	—	———	0


										Aluminum



												2 3/8"	3 1/2"	3/4"	Socket Head	2	6436K162	00000	—	—	———	0

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

Tires

Fit these highly flexible rubber tires over the two hubs. They transmit torque, compensate for misalignment, and isolate shock and vibration.

Buna-N—Highly tear resistant.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial		Each
Buna-N



		9 1/4"	L190	2,800	4,350	0.125"	4°	0.313"	6241K25	0000000

High-Torque Sleeve Couplings

With a steel sleeve and hubs, these transmit higher torque than other sleeve couplings. Lubricate to reduce friction between the teeth on the hubs and the grooves on the sleeve. For a complete coupling, select two hubs, one sleeve, and one seal kit. 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.

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

Press-Fit Shaft Mount—Apply heat to expand these hubs slightly and fit them onto the shaft. They shrink as they cool to form a tight grip on the shaft.

For Shaft Type	Shaft Mount Type	For Shaft Diameter		Each







Steel

5 1/2"	C-2.5	4 3/4"	Keyed	Press Fit	2 3/8"	6454K17	0000000

Sleeves

Fit these strong, rigid cylinders over two hubs to join them.

Steel—Best for dry environments, since moisture will cause these sleeves to rust.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial		Each
Steel



		5 1/2"	C-2.5	3,750	30,200	0.007"	1°	0.05"	6454K27	0000000

Seal Kits

Prevent lubricant leaks and keep contaminants out of couplings.

Buna-N and Steel Seal—Rubber seals that keep lubricant in and contaminants out, secured by durable steel rings to ensure a tight seal.

	Shaft Coupling Trade Size	Includes		Each
Buna-N and Steel Seal



	5 1/2"	C-2.5	Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings	6454K37	0000000

Shock-Absorbing Grid Couplings

A strip of flexible spring steel (known as a grid) absorbs sudden load increases from motor startups, emergency braking, and other shock loads. They're commonly found in wire drawing and cutting machines, pulverizers, and mixers. For a complete coupling, select two hubs and a grid kit. 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.

Black-Oxide Steel—Typically chosen for their appearance, these hubs have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

For Shaft Type	Shaft Mount Type	For Shaft Diameter		Each







Black-Oxide Steel

6 11/32"	1090T	7 7/8"	Keyed	Set Screw	2 3/8"	3395N8	0000000

Grid Kits

The grid wraps around the teeth of both hubs to spread the force of starts, stops, and reversals. When the shock load hits, the grid flexes to spread out the load. After the load passes, the grid straightens back out.

Spring Steel—Use these hard, rigid grids for high-stress applications. They're best for dry environments, since moisture will cause them to rust.

	Grid Kits									Replacement Grids		Replacement Seals		Additional Grease
					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Includes		Each		Each		Each		Each
Spring Steel



		6 11/32"	1090T	3,600	33,000	0.016"	0.25°	One Grid, One Two-Piece Grid Cover, Two Paper Gaskets, Two Rubber Seals, Fasteners, Grease	3395N127	0000000	3395N118	0000000	3395N136	000000	8670T12	000000

Shaft Collars

Slide these collars from one end of your shaft and tighten the clamping screw. They grip firmly and evenly without marring the shaft, so you can reposition or remove them later.

Black-Oxide Carbon Steel—Dark and matted for a finished look, but with minimal corrosion resistance. Best for dry environments.

Zinc-Plated Carbon Steel—A step up from plain carbon steel collars, these withstand occasional exposure to moisture.

303 Stainless Steel—Withstand moisture and mild cleaning solutions, such as acetone and ammonia. These are easier to machine than other stainless steel collars.

316 Stainless Steel—More corrosion resistant than 303 stainless steel collars. These collars withstand salt water and harsh chemicals, such as bleach, chlorine, and phosphoric acid.

Aluminum—One-third the weight of steel and corrosion resistant.

				Clamping Screw
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each
Black-Oxide Carbon Steel



		2 3/8"	3 1/2"	3/4"	Socket Head	1	6435K95	000000


		Zinc-Plated Carbon Steel



				2 3/8"	3 1/2"	3/4"	Socket Head	1	9961K51	00000


				303 Stainless Steel



						2 3/8"	3 1/2"	3/4"	Socket Head	1	6435K96	00000


						316 Stainless Steel



								2 3/8"	3 1/2"	3/4"	Socket Head	1	9421T41	00000


								Aluminum



										2 3/8"	3 1/2"	3/4"	Socket Head	1	6157K51	00000