Couplings for 38mm Shafts

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6.000 mm to 10.000 mm

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6.000 mm to 16.000 mm

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9.500 mm to 25.000 mm

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9.500 mm to 35.000 mm

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12.500 mm to 40.000 mm

Shaft Type

Component

Construction

Keyway Width

For Shaft Misalignment Type

Material

Flexible Shaft Coupling Type

Sleeve

Spider

Flexible Shaft Coupling Trade Size

For Rotary Motion

Overall Length

Keyway Depth

Shaft Mount Type

Maximum Rotation Speed

Length

Maximum Torque

Less than 10,000 in·lbf

Set Screw Material

Steel

Shaft Coupling Flexibility

Flexible

Number of Set Screws Included

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

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

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40 Products

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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.

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







	Iron

	3 21/64"	L110	4 7/32"	Set Screw	38 mm	6408K18	000000


	3 3/4"	L150	4 1/2"	Set Screw	38 mm	6408K19	000000




			Steel

			115 mm	L190	124 mm	Set Screw	38 mm	6133N22	000000


			127 mm	L225	137 mm	Set Screw	38 mm	6133N23	000000

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.

Polyurethane Rubber—Superior tear resistance to Buna-N and Hytrel and a good balance of stiffness and vibration damping.

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



		3 21/64", 85 mm	L110	5,000	790	0.015"	1°	6408K79	000000


		3 3/4", 96 mm	L150	5,000	1,240	0.015"	1°	6408K81	00000
		4 1/2", 115 mm	L190	5,000	1,725	0.015"	1°	6408K82	00000
		5", 127 mm	L225	4,200	2,340	0.015"	1°	6408K62	00000


		Polyurethane Rubber



				3 21/64"	L110	3,600	1,185	0.015"	1°	2410K17	000000


				3 3/4"	L150	3,600	1,860	0.015"	1°	2410K19	000000


				Hytrel



						3 21/64", 85 mm	L110	3,600	2,265	0.015"	0.5°	6408K97	000000


						3 3/4", 96 mm	L150	3,600	3,705	0.015"	0.5°	6408K98	000000
						4 1/2", 115 mm	L190	5,000	4,680	0.015"	0.5°	6408K99	000000
						5", 127 mm	L225	4,200	6,225	0.015"	0.5°	6408K64	000000

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.

Polyurethane Rubber—Provide fair vibration damping and tear resistance.

					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F		Each
Polyurethane Rubber



		3 21/64"	L110	5,900	2,180	0.03"	2°	-30 to 200	2393K35	0000000

Retaining Rings

Press the pins on these rings into the grooves on a split spider. Then, twist to lock the spider in place and transmit torque between shafts.

347 Stainless Steel—Provide good corrosion resistance.

	For Hub OD		Each
347 Stainless Steel



	L110	3 21/64"	2393K25	0000000

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 3/16"	QF25	4 29/32"	Set Screw	38 mm	3565N3	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 3/16"	QF25	7,000	3,425	0.039"	2°	0.116"	-60 to 212	3565N47	000000


		Durometer 60D (Medium) Urethane Rubber



				3 3/16"	QF25	7,000	6,460	0.039"	2°	0.116"	-60 to 212	3565N49	00000


				3 3/16"	QF25	7,000	6,460	0.039"	2°	0.116"	-60 to 350	3565N48	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



	QF25	3 3/16"	3565N63	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



	4 5/8"	7S	3 15/16"	Set Screw	38 mm	6507K5	000000


	5 29/64"	8S	4 7/16"	Set Screw	38 mm	6507K12	00000

Sleeves

Install these flexible, cylindrical sleeves between the hubs.

TPE—Flexible rubber that resists water and outdoor conditions.

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



		4 5/8"	7S	5,250	725	0.02"	1°	0.125"	6507K74	000000


		5 29/64"	8S	4,500	1,135	0.02"	1°	0.125"	6507K75	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., mm	OD, mm	Wd., mm	Type	No. Included		Each
Black Anodized Aluminum



		38	75	15	Socket Head	1	1511K268	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.

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



		38	60	15	Socket Head	1	57445K428	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.

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
Blue Passivated Zinc-Plated Carbon Steel



		38	56	16	Hex Socket	1	6057N36	000000


		Carbon Steel



				38	56	16	Hex Socket	1	6056N36	0000


				303 Stainless Steel



						38	56	16	Hex Socket	1	6058N36	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



		38	60	15	40.5	45	Socket Head	1	3466N45	000000


		303 Stainless Steel



				38	60	15	40.5	45	Socket Head	1	3466N81	000000


				Black Anodized Aluminum



						38	60	15	40.5	45	Socket Head	1	3466N117	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



		38	60	15	40.5	45	Socket Head	2	3553N155	000000


		303 Stainless Steel



				38	60	15	40.5	45	Socket Head	2	3553N255	000000


				Black Anodized Aluminum



						38	60	15	40.5	45	Socket Head	2	3553N355	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.

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



		38	60	15	Socket Head	2	6063K55	000000


		Zinc-Plated Carbon Steel



				38	60	15	Socket Head	2	5731N25	00000


				303 Stainless Steel



						38	60	15	Socket Head	2	9731N21	000000


						Aluminum



								38	60	15	Socket Head	2	7731N19	00000