Couplings for 38mm Shafts

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40 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

			4 7/32"	3 21/64"	Keyed	Forward/Reverse, Start/Stop	38	6408K18	000000	5,000	790	0.015"	1°	-40 to 212	Buna-N	6408K79	000000	3,600	2,265	0.015"	0.5°	-55 to 245	Hytrel	6408K97	0000000	3,600	1,185	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K17	0000000	5,900	2,180	0.03"	2°	-30 to 200	Polyurethane Rubber	2393K35	0000000	2393K25	0000000


			4 1/2"	3 3/4"	Keyed	Forward/Reverse, Start/Stop	38	6408K19	000000	5,000	1,240	0.015"	1°	-40 to 212	Buna-N	6408K81	00000	3,600	3,705	0.015"	0.5°	-55 to 245	Hytrel	6408K98	000000	3,600	1,860	0.015"	1°	-30 to 160	Polyurethane Rubber	2410K19	000000	—	—	—	—	—	—	———	0	———	0




					Steel Hubs

					124 mm	115 mm	Keyed	Forward/Reverse, Start/Stop	38	6133N22	000000	5,000	1,725	0.015"	1°	-40 to 212	Buna-N	6408K82	00000	5,000	4,680	0.015"	0.5°	-55 to 245	Hytrel	6408K99	000000	—	—	—	—	—	—	———	0	—	—	—	—	—	—	———	0	———	0


					137 mm	127 mm	Keyed	Forward/Reverse, Start/Stop	38	6133N23	000000	4,200	2,340	0.015"	1°	-40 to 212	Buna-N	6408K62	00000	4,200	6,225	0.015"	0.5°	-55 to 245	Hytrel	6408K64	000000	—	—	—	—	—	—	———	0	—	—	—	—	—	—	———	0	———	0

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

			4 29/32"	3 3/16"	Keyed	Forward/Reverse, Start/Stop	38	3565N3	0000000	3565N63	000000

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


				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

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



		3 15/16"	4 5/8"	Continuous	38	6507K5	000000	5,250	725	0.02"	1°	0.125"	-30 to 275	TPE	6507K74	000000


		4 7/16"	5 29/64"	Continuous	38	6507K12	00000	4,500	1,135	0.02"	1°	0.125"	-30 to 275	TPE	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	00000


				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