Couplings for 50mm Shafts

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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

Shaft Type

Construction

Overall Length

Material

Keyway Width

Length

Shaft Mount Type

Shaft Coupling Flexibility

For Rotary Motion

Keyway Depth

For Shaft Misalignment Type

Angular

No Misalignment

Parallel

Maximum Torque

10,000 in·lbf to 19,999 in·lbf

Number of Set Screws Included

Finish

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

Component

REACH

RoHS

Compliant with Exemptions

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Set Screw Drive Style

Width

Drive Style

37 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.

Hubs							Buna-N Spiders								Hytrel 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	Spider Material		Each	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Temp. Range, ° F	Spider Material		Each







			Steel Hubs

			137	127	Keyed	Forward/Reverse, Start/Stop	50	6133N23	0000000	4,200	2,340	0.015"	1°	-40 to 212	Buna-N	6408K62	000000	4,200	6,225	0.015"	0.5°	-55 to 245	Hytrel	6408K64	0000000

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 Keyed Shafts	For Round Shafts

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

For Keyed Shafts—Couplings for keyed shafts have keyways that are cut to standard ANSI dimensions, so they fit snugly on ANSI keyed shafts to eliminate slipping during starts and stops.

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



	50 mm × 50 mm	124	85	4,000	19,910	Forward/Reverse, Start/Stop, Continuous	6508T169	0000000


	For Round Shafts



			50 mm × 50 mm	124	85	4,000	19,910	Forward/Reverse, Start/Stop, Continuous	6508T135	000000

Bearing Adapter Sleeves

Make up for imperfections and gaps between your bearing and shaft for a tight fit. These bearing adapter sleeves are the most common way to mount a bearing with a tapered bore onto a cylindrical seat. They work with both straight and stepped shafts. Secure using the included lock nut.

Metric

	For Shaft Dia., mm	ID, mm	Wd., mm	Includes		Each
Low-Carbon Steel



	H 311	50	50	45	Lock Nut, Lock Washer	4449N25	000000


	H 2311	50	50	59	Lock Nut, Lock Washer	4449N26	00000

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



		50	78	31.75	114	12.7	14	3.8	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8.4	3	9604T24	0000000


		303 Stainless Steel



				50	78	31.75	114	12.7	14	3.8	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8.4	3	9624T29	000000


				Aluminum



						50	78	31.75	114	12.7	14	3.8	Keyed	Socket Head	2	No	M8 × 1.25 mm	3	8	3	9723T24	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.

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



		50	79	19	Socket Head	1	57445K79	000000


		Zinc-Plated Carbon Steel



				50	78	19	Socket Head	1	57445K475	00000


				303 Stainless Steel



						50	79	19	Socket Head	1	9616T31	000000


						Aluminum



								50	78	19	Socket Head	1	9506T16	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.

Chrome-Plated Carbon Steel—Resist moisture and mild cleaning solutions better than zinc-plated collars.

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.

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



		50	78	19	Socket Head	2	6063K26	000000	14	3.8	3390N27	000000


		Chrome-Plated Carbon Steel



				50	78	19	Socket Head	2	3388N32	00000	—	—	———	0


				Carbon Steel



						50	78	19	Socket Head	2	9739T525	00000	—	—	———	0


						303 Stainless Steel



								50	78	19	Socket Head	2	3369K31	000000	—	—	———	0


								316 Stainless Steel



										50	78	19	Socket Head	2	9652T27	000000	—	—	———	0


										Aluminum



												50	78	19	Socket Head	2	9520T21	00000	—	—	———	0

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



		50	78	19	Socket Head	1	5706T29	000000


		303 Stainless Steel



				50	78	19	Socket Head	1	5719T21	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



		50	100	19	Socket Head	1	1511K273	0000000

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.

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



		50	78	19	73	Socket Head	2	9746T225	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., mm	OD, mm	Wd., mm	Type	No. Included	Mounting Fasteners Included	Thread Size	No. of		Each
Black-Oxide Carbon Steel



		50	78	19	Socket Head	1	No	M8 × 1.25 mm	2	5633T21	000000


		303 Stainless Steel



				50	78	19	Socket Head	1	No	M8 × 1.25 mm	2	5705T21	000000

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.

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		Clamping Screw			Each
	For Shaft Dia., mm	OD, mm	Wd., mm	Type	No. Included	Type	No. Included		1-24	25-Up
Black-Oxide Carbon Steel



		50	78	19	Hex Socket	1	Socket Head	2	1069N52	000000	000000


		303 Stainless Steel



				50	78	19	Hex Socket	1	Socket Head	2	1069N62	00000	00000

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



		50	84	22	Socket Head	2	8386K651	000000	14	3.8	8386K664	000000


		303 Stainless Steel



				50	84	22	Socket Head	2	8386K674	000000	—	—	———	0

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



		50	79	18	Hex Socket	1	57485K89	000000


		Blue Passivated Zinc-Plated Carbon Steel



				50	80	18	Hex Socket	1	6057N42	00000


				Carbon Steel



						50	80	18	Hex Socket	1	6056N42	00000


						303 Stainless Steel



								50	79	18	Hex Socket	1	57485K52	000000


								50	80	18	Hex Socket	2	6058N42	00000