Bushings for 3mm Shafts | McMaster-Carr

Made of naturally slippery plastic so you’ll never have to add lubricant. They’re ideal for clean environments where you need to prevent oil drips or graphite flakes. Compared to metal bearings, they are lighter and will never rust.

Flanged sleeve bearings combine a sleeve and thrust bearing in one. The flange supports thrust loads and prevents the bearing from being pushed out of place. The sleeve is the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

Ultra-Chemical-Resistant PTFE—The most chemical-resistant bearings we offer. PTFE is unaffected by the harsh fluids that other plastics can't handle, including all strong acids and bases. PTFE also reduces friction better than nylon but is not as strong.

High-Load PEEK—Get the strength of reinforced PTFE without compromising on heat resistance. With no additives, such as polyester fabric, PEEK bearings won’t melt at high temperatures. They’re also nearly as slippery and chemical resistant as plain PTFE.

Ultra-Low-Friction Rulon J—These bearings glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

Moisture-Resistant Ultra-Low-Friction Plastic Blend—These bearings won't warp or swell from humidity or direct contact with water. They glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

High-Load Ultra-Low-Friction Plastic Blend—Create the least amount of friction of any bearings that we offer. They handle heavier loads than Rulon J bearings but can't withstand the same extreme temperatures.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F	Food Industry Std.		Each
Ultra-Chemical-Resistant PTFE



	3	6	4	9	1.5	5 lb. @ 120 rpm	7.5 lb. @ 120 rpm	White	-200 to 450	FDA Compliant 21 CFR 177.1550	2706T511	000000


	High-Load PEEK



			3	6	4	9	1.5	70 lb. @ 120 rpm	110 lb. @ 120 rpm	Beige	-20 to 450	—	6627K501	00000


			Ultra-Low-Friction Rulon J



					3	6	5	9	1.5	17 lb. @ 120 rpm	55 lb. @ 120 rpm	Gold	-400 to 500	—	6377K311	00000


					Moisture-Resistant Ultra-Low-Friction Plastic Blend



							3	4.5	3	7.5	0.75	36 lb. @ 120 rpm	60 lb. @ 120 rpm	Yellow	-50 to 190	—	2705T111	0000


							3	4.5	5	7.5	0.75	60 lb. @ 120 rpm	60 lb. @ 120 rpm	Yellow	-50 to 190	—	2705T112	0000


							High-Load Ultra-Low-Friction Plastic Blend



									3	4.5	5	7.5	0.75	85 lb. @ 120 rpm	85 lb. @ 120 rpm	Yellow	-55 to 190	—	2706T72	0000

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.

High-Load 863 Iron Copper—Iron makes these bearings harder, stronger, and more resistant to sudden starts and stops than 841 bearing bronze. However, they operate at slower speeds. The increased iron content makes these bearings appear silver.

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



	3	5	4	37 lb. @ 120 rpm	Mineral Oil	10 to 220	6658K412	00000


	3	6	4	37 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K64	0000
	3	6	6	55 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K111	0000
	3	6	10	90 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6658K721	0000


	High-Load 863 Iron Copper



			3	6	4	70 lb. @ 120 rpm	Synthetic Oil	-15 to 300	2868T304	0000


			3	6	10	185 lb. @ 120 rpm	Synthetic Oil	-15 to 300	2868T305	0000

Oil-Embedded Flanged Sleeve 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.

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



	3	4.5	3	7.5	0.75	27 lb. @ 120 rpm	115 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6659K201	000000


	3	4.5	5	7.5	0.75	46 lb. @ 120 rpm	115 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6659K202	00000
	3	6	4	9	1.5	37 lb. @ 120 rpm	175 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6659K64	0000
	3	6	5	9	1.5	46 lb. @ 120 rpm	175 lb. @ 120 rpm	Synthetic Oil	-35 to 300	6659K203	00000
	3	6	6	9	1.5	55 lb. @ 120 rpm	175 lb. @ 120 rpm	Mineral Oil	10 to 220	6659K111	0000


	High-Load 863 Iron Copper



			3	6	4	9	1.5	70 lb. @ 120 rpm	270 lb. @ 120 rpm	Synthetic Oil	-15 to 300	2938T75	0000

Dry-Running Sleeve Bearings

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.

Ultra-Low-Friction Rulon J—These bearings glide effortlessly for applications with frequent starts and stops, such as conveyor systems.

								Each
	For Shaft Dia., mm	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Color	Temp. Range, ° F		1-24	25-99	100-Up
Ultra-Low-Friction Rulon J



		3	6	5	17 lb. @ 120 rpm	Gold	-400 to 550	6377K511	000000	000000	000000

Sleeve Bearings

These bearings don’t come with a lubricant, so you can select the oil that meets the needs of your application. You’ll need to refill the oil, so make sure the bearing is located where you can access it. All are fabricated 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.

High-Load 932 Bearing Bronze—These bearings are strong enough for sudden starts and stops, plus they resist wear and tear. They are cast from an alloy of leaded tin bronze for uniform rigidity and strength. Also known as 660 leaded bronze bearings.

	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	3	6	3	55 lb. @ 120 rpm	-350 to 450	7811K111	00000

Flanged Sleeve Bearings

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
High-Load 932 Bearing Bronze



	3	6	4	9	1.5	70 lb. @ 120 rpm	350 lb. @ 120 rpm	-350 to 450	5448T411	000000

Ultra-Low-Friction Oil-Embedded Sleeve Bearings

Our slipperiest metal bearings, these are ideal for machinery with frequent starts and stops, such as conveyors. With nonstick PTFE particles added to the oil, they reduce friction to minimize wear and heat, so equipment runs more efficiently and lasts longer. 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.

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



	3	6	4	37 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	1688K114	00000


	3	6	10	90 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	1688K115	0000


	High-Load 863 Iron Copper



			3	6	4	70 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	—	7460N114	0000


			3	6	10	185 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	—	7460N115	0000

Ultra-Low-Friction Oil-Embedded Flanged Sleeve Bearings

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

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Base Oil	Lubricant Additive	Temp. Range, ° F	Specs. Met		Each
841 Bearing Bronze



	3	6	4	9	1.5	37 lb. @ 120 rpm	175 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	ASTM B438	1677K214	00000


	High-Load 863 Iron Copper



			3	6	4	9	1.5	70 lb. @ 120 rpm	270 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	—	7119N113	0000

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.

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



	3	6	1.5	210 lb. @ 120 rpm	Synthetic Oil	-35 to 300	2011N36	00000

Oil-Embedded Sleeve Bearings for Food and Beverage

These lead-free bearings are infused with a food-grade oil that is odorless, colorless, tasteless, and safe for unintended contact with food. They’re often used in food and beverage processing, packing, and handling equipment. All are made from porous metal and saturated with oil to reduce maintenance and downtime. If you need a bearing rated for contact with food, consider dry-running sleeve bearings for food and beverage. 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.

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



	3	6	10	90 lb. @ 120 rpm	Synthetic Oil	-75 to 300	FDA Compliant 21 CFR 178.3570	7095K115	00000


	High-Load 863 Iron Copper



			3	6	4	70 lb. @ 120 rpm	Synthetic Oil	-75 to 300	FDA Compliant 21 CFR 178.3570, ASTM B439	7407N114	0000

Mounted Linear Ball Bearings

Bearings are for use with round end-supported shafts. All have end seals to keep lubricant in and dirt out.

Fixed Alignment

Image of Product. Front orientation. Contains Annotated. Linear Bearings. Mounted Linear Ball Bearings .

Fixed-alignment bearings are for use where shaft misalignment is unlikely.

		Overall, mm					Load Capacity, lb.		Temp., ° F			Mounting Holes
	For Shaft Dia., mm	Lg.	Wd.	Ht.	Ctr. Ht., mm	With End Seals	Dynamic	Static	Min.	Max.	For Shaft Material	No. of	Dia., mm	Thread Size		Each
Steel Bearings with 6061 Aluminum Housing



		3	13	16	10	5	Yes	15	23	-4	176	Stainless Steel, Steel	4	2	M2 × 0.4 mm	9338T61	000000

Linear Ball Bearings

Bearings are for use with round end-supported shafts. To install, slide bearings into a housing (not included).

Fixed Alignment

Without Retaining

Ring Grooves

Fixed-alignment bearings are for use where shaft misalignment is unlikely.

Stainless Steel Ball—Bearings with stainless steel balls are more corrosion resistant than bearings with steel balls.

							Load Capacity, lb.		Temp., ° F
	For Shaft Dia., mm	Overall Lg., mm	OD, mm	For Housing ID	With Retaining Ring Grooves	With End Seals	Dynamic	Static	Min.	Max.	For Shaft Material		Each
440C Stainless Steel Bearings with Stainless Steel Balls



		3	10	7	7.000 mm to 7.015 mm	No	No	15	20	-4	176	Stainless Steel, Steel	61205K97	000000


		Steel Bearings with Steel Balls



				3	10	7	7.000 mm to 7.015 mm	No	No	15	20	-4	176	Stainless Steel, Steel	61205K71	00000

Ultra-Low-Friction Oil-Embedded Thrust Bearings

Our slipperiest metal thrust bearings glide on machines with frequent starts and stops, such as conveyors. Their oil contains nonstick PTFE particles that reduce wear and heat, extending the life of your equipment. All are fabricated, lubricated, and inspected in the U.S.

High-Load 863 Iron Copper—Iron makes these bearings harder, stronger, and more resistant to sudden starts and stops than 841 bearing bronze. However, they run at slower speeds. The increased iron content also makes them appear silver.

	OD, mm	Thk., mm	Dynamic Thrust Load Cap. @ Speed	Base Oil	Lubricant Additive	Temp. Range, ° F		Each
High-Load 863 Iron Copper



	3	6	1.5	125 lb. @ 120 rpm	Synthetic Oil	PTFE	-60 to 300	7380N173	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.

Blue Passivated Zinc-Plated Carbon Steel—Withstand moisture and mild chemicals better than standard zinc-plated-steel collars. The blue passivated finish makes it easy to identify metric collars at a glance.

Carbon Steel—Strong and easy to machine. Use in dry environments, since moisture will cause steel to rust.

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

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



		3	10	5	Hex Socket	1	57485K63	00000


		Blue Passivated Zinc-Plated Carbon Steel



				3	7	5	Hex Socket	1	6057N11	0000


				Carbon Steel



						3	7	5	Hex Socket	1	6056N11	0000


						303 Stainless Steel



								3	7	5	Hex Socket	1	6058N11	0000


								3	10	5	Hex Socket	1	57485K12	00000

Plastic Shaft Collars

Lightweight alternatives to metal collars for weight-sensitive applications. 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.

Acetal—Resist swelling when exposed to moisture.

				Clamping Screw
	For Shaft Dia., mm	OD, mm	Wd., mm	Type	No. Included		Each
Acetal



		3	16	9	Socket Head	1	3761N115	000000

High-Temperature Linear Ball Bearings

The choice for low-friction motion in high-temperature environments. Bearings are for use with round end-supported shafts and have a fixed-alignment design for applications where shaft misalignment is unlikely. To install, slide bearings into a housing (not included).

Fixed Alignment

Without Retaining

Ring Grooves

							Load Capacity, lb.			Temp., ° F
	For Shaft Dia., mm	Overall Lg., mm	OD, mm	For Housing ID	With Retaining Ring Grooves	With End Seals	Dynamic	Static	Dynamic Load Cap. @ Temp.	Min.	Max.	For Shaft Material		Each
Steel Bearings with Steel Balls



		3	10	7	7.000 mm to 7.015 mm	No	No	15	20	15 lb. @ 230° F	-4	230	Stainless Steel, Steel	63255K41	000000

Precision Spider Couplings

Position shafts and handle misalignment on precision motors, pumps, and other equipment that requires highly controlled movements. These couplings have a hard, rubber spider to fully transfer torque from one shaft to the other (zero backlash). They're also known as precision jaw couplings. 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.

Aluminum—Lightweight and corrosion resistant.

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

	Shaft Mount Type	Choose a Shaft Dia.		Each
Round







	Aluminum

	15	10/15	21.8	Clamp On	3 mm	9845T51	000000

Spiders

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

Polyurethane Rubber—Provide a balance of stiffness and moderate vibration damping. Higher-durometer spiders are more rigid for more precise positioning, but they absorb less vibration.

					Misalignment Capability
	For Hub OD, mm	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular		Each
Durometer 85A (Hard) Polyurethane Rubber



		15	10/15	8,000	4.8	0.005"	1°	9845T487	000000


		Durometer 92A (Extra Hard) Polyurethane Rubber



				15	10/15	8,000	10	0.004"	0.9°	9845T486	00000


				Durometer 98A (Extra Hard) Polyurethane Rubber



						15	10/15	8,000	16	0.002"	0.8°	9845T485	00000

Two-Piece Rigid Shaft Couplings

Install and remove these shaft couplings without disconnecting the shafts, motors, and other attached components—they’re made in two pieces so you don’t need to slide them onto shaft ends. They’re also useful when you have limited access to the ends of the shafts. These couplings clamp onto the shafts, creating a secure hold that won’t mar them. Good for high-torque applications, they have a rigid construction. However, their rigidity means these couplings can only connect shafts that are well aligned.

Black-Oxide Steel

For Round

Shafts

Steel couplings are stronger and handle higher torque loads than aluminum and stainless steel couplings.

	Overall Lg., mm	OD, mm	Max. Rotation Speed, rpm	Max. Torque, in·lbf	For Rotary Motion		Each
For Round Shafts



	3 mm × 3 mm	22	15	4,000	13	Forward/Reverse, Start/Stop, Continuous	6508T124	000000

303 Stainless Steel

For Round

Shafts

303 stainless steel couplings resist corrosion, so they’re often used in wet conditions, such as with mixers and pumps.

	Overall Lg., mm	OD, mm	Max. Rotation Speed, rpm	Max. Torque, in·lbf	For Rotary Motion		Each
For Round Shafts



	3 mm × 3 mm	22	15	4,000	9	Forward/Reverse, Start/Stop, Continuous	6508T125	0000000

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.

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

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

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



		3	18	9	Socket Head	1	57445K28	00000


		Zinc-Plated Carbon Steel



				3	16	9	Socket Head	1	57445K436	00000


				303 Stainless Steel



						3	18	9	Socket Head	1	9616T12	00000


						Aluminum



								3	18	9	Socket Head	1	9506T18	0000


								Black Anodized Aluminum



										3	16	9	Socket Head	1	9506T332	00000

High-Parallel-Misalignment Slotted Disc Couplings

Unlike couplings that flex to handle offset shafts, these have a slotted center disc that allows shafts to slide independently to compensate for parallel misalignment. The plastic center disc also helps transmit torque while preventing metal-to-metal contact between hubs, so there's no lubrication required. Also known as Oldham couplings. For a complete coupling, select two hubs and one disc. 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.

Aluminum—Lightweight and corrosion resistant.

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

For Shaft Type	Shaft Mount Type	Choose a Shaft Dia.		Each







Aluminum

1/2"	8/13	5/8"	Round	Set Screw	3 mm	59985K1	000000

Discs

With two perpendicular slots (one on each side), these discs allow shafts to slide, adjusting for parallel misalignment.

Acetal—Provide a balance of stiffness and flexibility while withstanding high torque. The best plastic discs for damp and wet environments, these won't swell or lose their strength if exposed to moisture.

Nylon—Keep these wear-resistant discs dry, since they'll swell and weaken if exposed to moisture.

PEEK—Stronger, stiffer, and more wear resistant than nylon and acetal discs.

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



		1/2"	8/13	4,500	6	0.004"	0.5°	0.002"	59985K61	00000


		Nylon



				1/2"	8/13	4,500	1.5	0.004"	0.5°	0.002"	59985K91	00000


				PEEK



						1/2"	8/13	4,500	6	0.004"	0.5°	0.002"	59985K719	00000

High-Parallel-and-Angular-Misalignment Precision Double Loop Couplings

A flexible center and offset hubs compensate for angular and parallel misalignment. These couplings also damp vibration and transfer torque fully between shafts (zero backlash). The nonmetallic loop center helps the couplings run smoothly and quietly without the need for lubrication.

Zinc-Plated Steel Hub with Polyurethane Rubber Loop—Strong steel hubs paired with a polyurethane rubber loop that damps vibration and has the same tear resistance as plastic. The hubs are plated to protect against occasional exposure to moisture.

316 Stainless Steel Hub with Polyurethane Rubber Loop—Strong, corrosion-resistant couplings that damp vibration and provide the same tear resistance as plastic.

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

					Misalignment Capability
Choose a Shaft Dia.	OD, mm	Overall Lg., mm	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	For Shaft Type	Shaft Mount Type		Each







			Zinc-Plated Steel Hub with Polyurethane Rubber Loop

			3 mm × 3 mm	22	29	3,600	3	0.094"	10°	Round	Set Screw	5384T501	000000




					316 Stainless Steel Hub with Polyurethane Rubber Loop

					3 mm × 3 mm	22	29	3,600	3	0.094"	10°	Round	Set Screw	5384T101	00000

Servomotor Precision Bonded Couplings

With a bonded rubber center, these couplings damp vibration and accommodate misalignment on servomotors. The center and the lightweight aluminum hubs transfer torque fully (zero backlash) between shafts that start and stop frequently or accelerate at high speeds. They're often used on packaging machines, press brakes, and machinery for semiconductor production.

Aluminum with Fluoroelastomer Center—Lightweight and corrosion-resistant hubs bonded with a flexible rubber center handle corrosive environments, vibration, and shaft misalignment.

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

					Misalignment Capability
Choose a Shaft Dia.	OD	Overall Lg.	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	For Shaft Type	Shaft Mount Type		Each







			Aluminum with Fluoroelastomer Center

			3 mm × 5 mm	19/32"	29/32"	40,000	9	0.006"	1.5°	0.008"	Round	Clamp On	6853N101	0000000


			3 mm × 6 mm	19/32"	29/32"	40,000	9	0.006"	1.5°	0.008"	Round	Clamp On	6853N102	000000

Precision Bellows Couplings

With a thin-walled, corrugated-metal center tube (bellows), these couplings flex to handle all types of misalignment while transmitting high torque. They're ideal for stepper motors, encoders, and other equipment that requires torque to be fully transferred between shafts (zero backlash). They have no moving parts or inserts, so they don't require lubrication.

Aluminum with 321 Stainless Steel Bellows—Lightweight aluminum hubs paired with stainless steel bellows for corrosion resistance.

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

					Misalignment Capability
Choose a Shaft Dia.	OD	Overall Lg.	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	For Shaft Type	Shaft Mount Type		Each







			Aluminum with 321 Stainless Steel Bellows

			3/16" × 3 mm	19/32"	1 1/16"	10,000	22	0.004"	1.5°	0.008"	Round	Clamp On	6446K762	0000000


			1/4" × 3 mm	19/32"	1 1/16"	10,000	22	0.004"	1.5°	0.008"	Round	Clamp On	6446K757	000000
			5 mm × 3 mm	15 mm	27.3 mm	10,000	22	0.1 mm	1.5°	0.2 mm	Round	Clamp On	6446K634	000000

Two-Piece Shaft Collars

For Round 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.

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

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

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



		3	16	9	Socket Head	2	6063K44	000000


		303 Stainless Steel



				3	16	9	Socket Head	2	3369K41	00000


				Aluminum



						3	16	9	Socket Head	2	9520T27	00000

Precision Beam Couplings

Machined with slits, these one-piece couplings flex to transfer full torque (zero backlash) and compensate for tiny misalignments.

Spiral Cut—Long slits along the surface help the coupling flex and handle greater misalignment than parallel cut couplings. They're also less rigid, so they're best used with light duty machinery, such as encoders and stepper drives. Also known as helical beam couplings.

Parallel Cut—With short, intermittent slits, these couplings are more rigid and handle more torque and speed than spiral cut couplings. However, they don't handle misalignment as well. Use them in linear test systems, scientific instruments, and other high-torque applications.

303 Stainless Steel—More corrosion resistant and stronger than aluminum couplings, these withstand mild cleaning solutions, such as acetone and ammonia.

Aluminum—Lightweight and corrosion resistant.

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

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

						Misalignment Capability
	Choose a Shaft Dia.	OD, mm	Overall Lg., mm	Max. Rotation Speed	Max. Torque, in·lbf	Parallel, mm	Angular	Axial, mm	For Shaft Type	Shaft Mount Type		Each
Spiral Cut







				303 Stainless Steel

				3 mm × 3 mm	15	22	6,000 rpm	10	0.2	3°	0.12	Round	Clamp On	2463K101	0000000


				3 mm × 5 mm	15	22	6,000 rpm	10	0.2	3°	0.12	Round	Clamp On	2463K103	000000




						Aluminum

						3 mm × 3/16"	15	22	6,000 rpm	7	0.2	3°	0.12	Round	Clamp On	2464K11	00000


						3 mm × 3 mm	9.5	12.7	Not Rated	3	—	2°	0.12	Round	Set Screw	4147N112	000000
						3 mm × 3 mm	12.7	19.1	Not Rated	5	—	2°	0.12	Round	Set Screw	4147N118	00000
						3 mm × 3 mm	15	22	6,000 rpm	7	0.2	3°	0.12	Round	Clamp On	2463K1	00000
						4 mm × 3 mm	15	22	6,000 rpm	7	0.2	3°	0.12	Round	Clamp On	2463K16	00000
						5 mm × 3 mm	12.7	19.1	Not Rated	5	—	2°	0.12	Round	Set Screw	4147N123	00000
						5 mm × 3 mm	15	22	6,000 rpm	7	0.2	3°	0.12	Round	Clamp On	2463K17	00000
						5 mm × 3 mm	19.1	25.4	Not Rated	25	—	3°	0.2	Round	Set Screw	4147N151	00000
						6 mm × 3 mm	15.9	22.4	Not Rated	12	—	3°	0.2	Round	Set Screw	4147N133	00000
						6 mm × 3 mm	19.1	19.1	Not Rated	20	—	3°	0.15	Round	Set Screw	4147N141	00000


						Parallel Cut







										Aluminum

										1/8" × 3 mm	13	16.8	12,000 rpm	7.1	0.08	2.5°	0.3	Round	Clamp On	8011N423	000000


										1/8" × 3 mm	13	16.8	30,000 rpm	10	0.08	2.5°	0.3	Round	Set Screw	4146N369	000000
										3/16" × 3 mm	13	20	20,000 rpm	10	0.15	2.5°	0.3	Round	Set Screw	4145N371	000000
										1/4" × 3 mm	13	20	20,000 rpm	10	0.15	2.5°	0.3	Round	Set Screw	4145N365	000000
										1/4" × 3 mm	16	19.8	10,000 rpm	11.1	0.1	2.5°	0.4	Round	Clamp On	8011N366	000000
										3 mm × 3 mm	6	12.5	32,000 rpm	2.2	0.04	1.5°	0.06	Round	Set Screw	4145N198	000000
										3 mm × 3 mm	13	16.8	12,000 rpm	7.1	0.08	2.5°	0.3	Round	Clamp On	8011N206	000000
										6 mm × 3 mm	16	19.8	10,000 rpm	11.1	0.1	2.5°	0.4	Round	Clamp On	8011N222	000000
										6 mm × 3 mm	16	23.5	10,000 rpm	11.1	0.2	2.5°	0.4	Round	Clamp On	8011N127	000000
										8 mm × 3 mm	16	23.5	10,000 rpm	11.1	0.2	2.5°	0.4	Round	Clamp On	8011N136	000000