Couplings for 3" Shafts | McMaster-Carr

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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

Construction

Shaft Type

Material

Maximum Torque

20,000 in·lbf to 29,999 in·lbf

Width

Overall Length

Shaft Mount Type

Length

Thread Size

Clamping Screw Material

Stainless Steel

Steel

Number of Clamping Screws Included

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

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Clamping Screw Type

For Shaft Misalignment Type

Keyway Width

Keyway Depth

Finish

Fabrication

Maximum Rotation Speed

2,545 rpm

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48 Products

Two-Piece Rigid Shaft Coupling Bridges

When your shafts are not close enough to use standard couplings, these have the length to bridge the gap. Install them anywhere on a shaft without removing components or having access to the ends of the shaft. Tighten the clamping screws to secure. Good for high-torque applications, rigid couplings connect two shafts that are aligned, allowing for no relative movement between the shafts.

Cast Iron

Image of Product. Front orientation. Rigid Shaft Couplings. Two-Piece Rigid Shaft Coupling Bridges .

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



	3"	12"	7 1/4"	2,545	29,000	Forward/Reverse, Start/Stop, Continuous	6417K28	000000000

Flange-Mount Shaft Collars

Use the tapped and unthreaded holes on the flange to mount components as needed. To install, slide these collars from one end of your shaft and tighten the clamping screws. The collars grip firmly and evenly without marring the shaft, so you can reposition or remove them later. Collars with keyways have a standard ANSI keyway to lock in place shafts, keys, and key stock.

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.

				Flange		Keyway			Clamping Screw			Mounting Holes		Unthreaded Mounting Holes
	For Shaft Dia.	OD	Wd.	OD	Thk.	Wd.	Dp.	For Shaft Type	Type	No. Included	Mounting Fasteners Included	Thread Size	No. of	Dia.	No. of		Each
Black-Oxide Carbon Steel



		3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9684T39	0000000


		303 Stainless Steel



				3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9692T48	000000


				Aluminum



						3"	4 1/2"	1 3/8"	6 11/32"	1/2"	3/4"	21/64"	Keyed	Socket Head	2	No	3/8"-16	3	3/8"	3	9793T29	000000

Oversized Two-Piece Shaft Collars


For Round Shafts	For Keyed Shafts

Wider and thicker with larger clamping screws, these deliver a more powerful hold than standard two-piece collars. Attach them anywhere along a shaft when other components are already installed or you can't access the ends. They grip 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.

						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



		3"	4 3/4"	1"	Socket Head	2	8386K26	0000000	3/4"	3/8"	8386K618	0000000


		303 Stainless Steel



				3"	4 3/4"	1"	Socket Head	2	8386K628	000000	—	—	———	0

Two-Piece Shaft Collars with Wrench Flats

When adjusting or troubleshooting your drive shaft, turn these collars with a wrench to avoid marring or gouging the surface. To install, snap the two pieces together anywhere along the shaft, which helps when other components are attached or you can't access the ends.

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.	OD	Wd.	Flat-to-Flat Ht.	Type	No. Included		Each
Black-Oxide Carbon Steel



		3"	4 1/4"	7/8"	4 1/16"	Socket Head	2	9746T17	000000


		303 Stainless Steel



				3"	4 1/4"	7/8"	4 1/16"	Socket Head	2	5876T26	000000


				Aluminum



						3"	4 1/4"	7/8"	4 1/16"	Socket Head	2	6100T28	000000

Quick-Release Shaft Collars with Pull Ring

Install, adjust, and remove these collars using nothing but your hands. Slide them from one end of the shaft and they won't backslide when pushed by components. To reposition, pull the end ring back to release the hold.

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.

	OD	Wd.		Each
Zinc-Plated Carbon Steel



	3"	3 15/32"	1 29/32"	7747K47	0000000


	303 Stainless Steel



			3"	3 15/32"	1 29/32"	6172K59	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.

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.

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



		3"	4 1/4"	7/8"	Socket Head	1	6435K77	000000


		Zinc-Plated Carbon Steel



				3"	4 1/4"	7/8"	Socket Head	1	9961K62	00000


				Chrome-Plated Carbon Steel



						3"	4 1/4"	7/8"	Socket Head	1	9959K62	00000


						303 Stainless Steel



								3"	4 1/4"	7/8"	Socket Head	1	6435K228	000000


								316 Stainless Steel



										3"	4 1/4"	7/8"	Socket Head	1	9421T52	000000


										Aluminum



												3"	4 1/4"	7/8"	Socket Head	1	6157K62	00000

Plastic Quick-Release Shaft Collars with Pull Ring

Install, adjust, and remove these lightweight collars using nothing but your hands. Slide them from one end of a shaft and they won't backslide when pushed by components. To reposition, pull the end ring back to release the hold.

ABS—Durable, lightweight, and corrosion resistant.

	OD	Wd.		Each
ABS



	3"	3 13/16"	2"	6168K59	0000000

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



		3"	4 3/4"	3/4"	Socket Head	1	1511K254	0000000

Hinged Shaft Collars

Combine the versatility of a two-piece collar with the no-fuss installation of a one-piece design. These hinged collars swing open and shut onto your shaft when other components are already attached or you can't access the ends. The clamping screw is captive so it won't fall out, and it aligns itself in the hole when the collar swings shut.

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.

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



		3"	4 1/2"	3/4"	Socket Head	1	57145K91	0000000


		303 Stainless Steel



				3"	4 1/2"	3/4"	Socket Head	1	57145K64	000000

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.

Nylon—Will swell and weaken when exposed to moisture, so they're best for dry environments.

				Clamping Screw
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each
Nylon



		3"	4 1/2"	1 1/8"	Socket Head	2	60485K85	000000


		Acetal



				3"	4 1/2"	1 1/8"	Socket Head	2	9708T34	00000

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



		3"	4 1/4"	7/8"	Socket Head	2	6436K57	000000	3/4"	11/32"	3357K48	0000000


		3"	4 1/2"	3/4"	Socket Head	2	60665K58	00000	—	—	———	0


		Zinc-Plated Carbon Steel



				3"	4 1/4"	7/8"	Socket Head	2	2380K62	00000	—	—	———	0


				3"	4 1/2"	3/4"	Socket Head	2	2380K67	00000	—	—	———	0


				Chrome-Plated Carbon Steel



						3"	4 1/4"	7/8"	Socket Head	2	3370K131	00000	—	—	———	0


						303 Stainless Steel



								3"	4 1/4"	7/8"	Socket Head	2	6436K121	000000	—	—	———	0


								3"	4 1/2"	3/4"	Socket Head	2	60665K11	000000	—	—	———	0


								316 Stainless Steel



										3"	4 1/4"	7/8"	Socket Head	2	9633T55	000000	—	—	———	0


										3"	4 1/2"	3/4"	Socket Head	2	9633T65	000000	—	—	———	0


										Aluminum



												3"	4 1/4"	7/8"	Socket Head	2	6436K173	00000	—	—	———	0


												3"	4 1/2"	3/4"	Socket Head	2	60665K21	000000	—	—	———	0

Oversized Shaft Collars

Wider and thicker with a larger clamping screw, these shaft collars deliver a stronger grip than standard collars. Slide them from one end of your shaft and tighten the screw. They clamp 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.	OD	Wd.	Type	No. Included		Each
Black-Oxide Carbon Steel



		3"	4 3/4"	1"	Socket Head	1	9951K26	000000

Plastic Set Screw Shaft Collars

Lightweight alternatives to traditional metal collars for weight-sensitive applications. The set screw digs into shafts for a secure hold, but one that leaves a gouge.

Nylon—Will swell and weaken when exposed to moisture, so they're best for dry environments.

				Set Screw			Each
	For Shaft Dia.	OD	Wd.	Type	No. Included		1-19	20-Up
Nylon



		3"	4 1/4"	1 1/8"	Hex Socket	1	60475K92	0000000	0000000

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



		3"	4 1/4"	7/8"	Hex Socket	1	Socket Head	2	1069N19	000000	000000

Face-Mount Shaft Collars

Mount components into the tapped holes on the face of these collars. They slide from one end of a shaft and clamp firmly and evenly to prevent marring, 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.

				Clamping Screw			Mounting Holes
	For Shaft Dia.	OD	Wd.	Type	No. Included	Mounting Fasteners Included	Thread Size	No. of		Each
Black-Oxide Carbon Steel



		3"	4 1/4"	7/8"	Socket Head	1	No	5/16"-18	2	9677T11	000000


		303 Stainless Steel



				3"	4 1/4"	7/8"	Socket Head	1	No	5/16"-18	2	5631T25	000000

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.

Nylon—Will swell and weaken when exposed to moisture, so they're best for dry environments.

				Clamping Screw
	For Shaft Dia.	OD	Wd.	Type	No. Included		Each
Nylon



		3"	4 1/2"	1 1/8"	Socket Head	1	9410T18	000000


		Acetal



				3"	4 1/2"	1 1/8"	Socket Head	1	9410T48	00000

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



		3"	4 1/4"	1 1/8"	Hex Socket	1	9414T52	000000


		Zinc-Plated Carbon Steel



				3"	4"	1 1/8"	Hex Socket	1	6432K49	00000


				303 Stainless Steel



						3"	4"	1 1/8"	Hex Socket	1	6462K49	000000


						316 Stainless Steel



								3"	4"	1 1/8"	Hex Socket	1	9943K62	000000


								Aluminum



										3"	4"	1 1/8"	Hex Socket	1	9946K47	00000