Couplings for 28mm Shafts

Filter by

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

10 mm

11 mm

12 mm

12.500 mm to 40.000 mm

Shaft Type

Construction

Keyway Width

Material

For Shaft Misalignment Type

Overall Length

Shaft Mount Type

Keyway Depth

For Rotary Motion

Length

Set Screw Material

Number of Set Screws Included

Maximum Torque

Less than 10,000 in·lbf

Maximum Rotation Speed

10,000 rpm

Shaft Coupling Flexibility

Flexible

Component

Hub

Split Spider

Set Screw Drive Style

Hex

Fabrication

Cast

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

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Forward

How can we improve?

73 Products

Set Screw Flexible Shaft Couplings


Hubs, Split Spider, and Retaining Ring Shown Assembled	(Each Component Sold Separately)

Hubs and Spider Shown Assembled	(Each Component Sold Separately)

Each hub includes a set screw (unless noted), which bites into your shaft to hold the coupling in place. Also known as Lovejoy® couplings, these three-piece couplings have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment.

A complete coupling consists of two hubs and one spider, or two hubs, one split spider, and one retaining ring (all components sold separately). Split spiders are easier to install and replace than standard spiders because there’s no need for tools or removing your hubs. Twist-lock them in place using a retaining ring.

Buna-N—Buna-N spiders provide good vibration damping and chemical resistance.

Hytrel—Hytrel spiders provide fair vibration damping and excellent chemical resistance.

Polyurethane Rubber—Polyurethane spiders and split spiders provide fair vibration damping and good chemical resistance.

Hubs							Buna-N Spiders								Hytrel Spiders								Polyurethane Spiders								Polyurethane Split Spiders								347 Stainless Steel Retaining Rings
									Misalignment Capability								Misalignment Capability								Misalignment Capability								Misalignment Capability
Overall Lg.	OD	For Shaft Type	For Rotary Motion	For Shaft Dia., mm		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Spider Material		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Spider Material		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Spider Material		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Spider Material		Each		Each







			Iron Hubs

			2 1/2"	2 7/64"	Keyed	Forward/Reverse, Start/Stop	28	6408K15	000000	9,000	140	0.015"	1°	-40 to 212	Buna-N	6408K75	000000	3,600	400	0.015"	0.5°	-55 to 245	Hytrel	6408K95	000000	3,600	210	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K13	000000	9,200	670	0.03"	2°	-30 to 200	Polyurethane Rubber	2393K33	000000	2393K23	000000


			2 27/32"	2 35/64"	Keyed	Forward/Reverse, Start/Stop	28	6408K16	00000	7,000	315	0.015"	1°	-40 to 212	Buna-N	6408K77	00000	3,600	790	0.015"	0.5°	-55 to 245	Hytrel	6408K96	000000	3,600	475	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K15	00000	7,700	1,110	0.03"	2°	-30 to 200	Polyurethane Rubber	2393K34	000000	2393K24	00000
			3 31/64"	2 35/64"	Keyed	Forward/Reverse, Start/Stop	28	6408K17	00000	7,000	315	0.015"	1°	-40 to 212	Buna-N	6408K77	00000	3,600	790	0.015"	0.5°	-55 to 245	Hytrel	6408K96	000000	3,600	475	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K15	00000	7,700	1,110	0.03"	2°	-30 to 200	Polyurethane Rubber	2393K34	000000	2393K24	00000
			4 7/32"	3 21/64"	Keyed	Forward/Reverse, Start/Stop	28	6408K18	00000	5,000	790	0.015"	1°	-40 to 212	Buna-N	6408K79	00000	3,600	2,265	0.015"	0.5°	-55 to 245	Hytrel	6408K97	000000	3,600	1,185	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K17	000000	5,900	2,180	0.03"	2°	-30 to 200	Polyurethane Rubber	2393K35	000000	2393K25	000000

High-Torque Set Screw Flexible Shaft Couplings

Image of System. Front orientation. Contains Annotated, MultipleImages. Flexible Shaft Couplings. High-Torque Set Screw Flexible Shaft Couplings.

The thick split spider on these couplings takes on twice as much torque as standard split spiders, while a set screw holds the hubs in place on your shaft. Also known as jaw couplings, use them to connect motors to pumps, mixers, and other high-torque equipment. You don’t need to lubricate them.

For a complete coupling, you’ll need two hubs, one split spider, and a split spider cover (all sold separately).

Hubs attach to the end of your shaft.

Split spiders cushion between the two hubs to dampen vibration, reduce shocks, and handle shaft misalignment, extending the life of bearings, seals, and motors. You can replace them without having to remove the hubs or move your shaft and equipment around, which reduces the risk of needing to realign the shaft.

Split spider covers hold the spider in place.

Hubs							Steel Split Spider Covers
Overall Lg.	OD	For Shaft Type	For Rotary Motion	For Shaft Dia., mm		Each		Each







			Steel Hubs, Split Spiders

			3 39/64"	2 5/16"	Keyed	Forward/Reverse, Start/Stop	28	3565N2	000000	3565N62	000000


			4 29/32"	3 3/16"	Keyed	Forward/Reverse, Start/Stop	28	3565N3	000000	3565N63	00000

Urethane Split Spiders

			Misalignment Capability
	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Color		Each
Medium Soft







				Durometer 48D

				7,000	3,425	0.039"	2°	-60 to 212	Red	3565N47	000000


				9,000	1,055	0.039"	2°	-60 to 212	Red	3565N44	00000


				Medium







								Durometer 60D

								7,000	6,460	0.039"	2°	-60 to 212	Blue	3565N49	00000


								7,000	6,460	0.039"	2°	-60 to 350	White	3565N48	000000
								9,000	2,075	0.039"	2°	-60 to 212	Blue	3565N46	00000
								9,000	2,075	0.039"	2°	-60 to 350	White	3565N45	000000

High-Speed Vibration-Damping Flexible Shaft Couplings


	(Each Component Sold Separately)

Use these gear-shaped couplings for high-speed and high-torque applications. A rubber center allows flexing so couplings can take on multiple types of misalignment while damping vibration and shock. With no metal-to-metal contact, there’s no need for lubrication. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.

A complete coupling consists of two hubs and one center (each component sold separately).

Hubs have a keyway, except hubs for 1⁄4" and 3⁄8" shaft dia. do not have a keyway.

	Hubs						Shaft Coupling Centers
									Misalignment Capability
	Overall Lg.	OD	For Rotary Motion	For Shaft Dia., mm		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	Temp. Range, ° F	Material		Each
Cast Iron Hubs



		2 13/16"	3 1/4"	Continuous	28	6507K63	000000	7,600	240	0.015"	1°	0.125"	-30 to 275	TPE	6507K72	000000


		3 1/2"	4"	Continuous	28	6507K65	00000	6,000	450	0.015"	1°	0.125"	-30 to 275	TPE	6507K73	00000
		3 15/16"	4 5/8"	Continuous	28	6507K5	00000	5,250	725	0.02"	1°	0.125"	-30 to 275	TPE	6507K74	00000
		4 7/16"	5 29/64"	Continuous	28	6507K12	00000	4,500	1,135	0.02"	1°	0.125"	-30 to 275	TPE	6507K75	00000

Set Screw Vibration-Damping Precision Flexible Shaft Couplings


(Each Component Sold Separately)	Components of a Coupling Shown Assembled

The included set screw holds the coupling in place. Good for precision motor and pump applications, the spider-shaped cushion reduces shock and compensates for minor shaft misalignment. Couplings allow zero backlash (no play).

A complete coupling consists of two hubs and one spider (each component sold separately). Hubs are lightweight, corrosion-resistant aluminum. Spiders are polyurethane for fair vibration damping and good chemical resistance.

Hubs							Durometer 98A Polyurethane Spiders							Durometer 92A Polyurethane Spiders
									Misalignment Capability							Misalignment Capability
Overall Lg., mm	OD, mm	For Shaft Type	For Rotary Motion	For Shaft Dia., mm		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F		Each







			2024 Aluminum Hubs

			80	57	Keyed	Continuous, Forward/Reverse, Start/Stop	28	9939T43	0000000	8,000	820	0.004"	0.8°	0 to 180	9845T26	000000	8,000	570	0.005"	0.9°	0 to 180	9845T27	000000

Clamping Vibration-Damping Precision Flexible Shaft Couplings


	(Each Component Sold Separately)

Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft. Tighten the clamping screws to secure. Good for precision motor and pump applications, the spider-shaped cushion reduces shock and compensates for minor shaft misalignment. Couplings allow zero backlash (no play).

Hubs							Durometer 98A Polyurethane Spiders							Durometer 92A Polyurethane Spiders
									Misalignment Capability							Misalignment Capability
Overall Lg., mm	OD, mm	For Shaft Type	For Rotary Motion	For Shaft Dia., mm		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F		Each







			2024 Aluminum Hubs

			80	57.2	Keyed	Forward/Reverse, Start/Stop	28	9845T62	0000000	8,000	820	0.004"	0.8°	0 to 180	9845T26	000000	8,000	570	0.005"	0.9°	0 to 180	9845T27	000000

Servomotor Precision Flexible Shaft Couplings

Able to handle high twisting forces as well as misalignment, these couplings are good for high-performance servomotor applications. Couplings are aluminum and stainless steel for corrosion resistance and allow zero backlash (no play). They grip evenly around your shaft for a strong hold without marring the shaft. Tighten the clamping screws to secure.

					Misalignment Capability
For Shaft Diameter	Overall Lg.	OD	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	For Rotary Motion		Each







			2017 Aluminum and 304 Stainless Steel

			3/4" × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K816	0000000


			7/8" × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K823	000000
			1" × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K829	000000
			20 mm × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K835	000000
			24 mm × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K839	000000
			28 mm × 28 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K843	000000
			28 mm × 32 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K844	000000
			28 mm × 35 mm	2 57/64"	2 11/16"	10,000	530	0.013"	1°	0.035"	Forward/Reverse, Start/Stop	2764K845	000000

Lightweight Flexible Shaft Couplings


	(Each Component Sold Separately)

Made with lightweight nylon sleeves, these gear couplings require less energy to move than other high-torque flexible couplings. They compensate for parallel, angular, and axial misalignment. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.

A complete coupling consists of two hubs and one sleeve (each component sold separately).

Hubs							Nylon Sleeves
									Misalignment Capability
Overall Lg., mm	OD, mm	For Shaft Type	For Rotary Motion	For Shaft Dia., mm		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	Max. Temp., ° F		Each







			Steel Hubs

			80.5	53.8	Keyed	Continuous	28	6247K54	000000	8,500	1,195	0.016"	1°	0.04"	180	6247K84	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



		28	48	16	Hex Socket	1	57485K79	00000


		Blue Passivated Zinc-Plated Carbon Steel



				28	45	16	Hex Socket	1	6057N31	0000


				Carbon Steel



						28	45	16	Hex Socket	1	6056N31	0000


						303 Stainless Steel



								28	45	16	Hex Socket	1	6058N31	00000


								28	48	16	Hex Socket	1	57485K42	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



		28	48	15	Socket Head	1	3761N113	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.

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



		28	48	15	Socket Head	2	6063K39	000000


		Zinc-Plated Carbon Steel



				28	48	15	Socket Head	2	5731N21	00000


				303 Stainless Steel



						28	48	15	Socket Head	2	3369K36	00000


						316 Stainless Steel



								28	48	15	Socket Head	2	9652T45	000000


								Aluminum



										28	48	15	Socket Head	2	9520T23	00000

Plastic Two-Piece Shaft Collars

Lightweight alternatives to metal two-piece collars for weight-sensitive applications. Attach these collars anywhere along a shaft when other components are already installed or you can't access the ends. They clamp 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



		28	48	15	Socket Head	2	3585N24	000000

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., mm	OD, mm	Wd., mm	Type	No. Included		Each
Black Anodized Aluminum



		28	50	13	Socket Head	1	1511K264	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.

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



		28	48	15	Socket Head	1	57445K424	000000


		303 Stainless Steel



				28	48	15	Socket Head	1	9616T424	00000


				Aluminum



						28	48	15	Socket Head	1	9506T324	00000

Shaft Collars with Lever

Ideal for frequent setup changes in tight spaces, these collars tighten with a lever instead of a screwdriver. Slide them from one end of your shaft and turn the lever like a ratchet to secure. To reposition or remove collars later, use the lever to loosen the screw and release the hold.

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.

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

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



		28	48	15	38.5	45	Socket Head	1	3466N39	000000


		303 Stainless Steel



				28	48	15	38.5	45	Socket Head	1	3466N75	00000


				Black Anodized Aluminum



						28	48	15	38.5	45	Socket Head	1	3466N111	00000

Two-Piece Shaft Collars with Lever

Skip the screwdriver—tighten these collars by turning the lever like a ratchet instead. They're ideal for packing, printing, label-feeding, and other equipment requiring frequent setup changes in tight spaces. Attach them anywhere along your shaft, which helps when other components are already installed or you can't access the ends. To reposition or remove collars later, use the lever to loosen the screw and release the hold.

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.

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

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



		28	48	15	38.5	45	Socket Head	2	3553N148	000000


		303 Stainless Steel



				28	48	15	38.5	45	Socket Head	2	3553N248	000000


				Black Anodized Aluminum



						28	48	15	38.5	45	Socket Head	2	3553N348	00000