Couplings for 2 7/8" Shafts

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Flexible Shaft Couplings

Shaft Collars

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

For Shaft Misalignment Type

Construction

Keyway Width

Shaft Mount Type

Overall Length

Material

Flexible Shaft Coupling Type

Keyway Depth

For Rotary Motion

Performance

Component

Fabrication

Manufacturer Series

Length

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

Yes

REACH

Compliant

RoHS

Compliant

Flexible Shaft Coupling Trade Size

10S

11S

1080T

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Shaft Coupling Flexibility

Flexible

Maximum Rotation Speed

26 Products

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	Choose a Shaft Dia.		Each
Cast Iron



	6 23/64"	9S	5 1/16"	Set Screw	2 7/8"	6507K7	0000000


	7 1/2"	10S	5 11/16"	Set Screw	2 7/8"	6507K8	000000
	8 5/8"	11S	7 1/8"	Set Screw	2 7/8"	6507K9	000000

Sleeves

Install these flexible, cylindrical sleeves between the hubs.

TPE—Flexible rubber that resists water and outdoor conditions.

EPDM—Flexible rubber that damps vibration.

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



		6 23/64"	9S	3,750	1,800	0.025"	1°	0.125"	6507K76	000000


		7 1/2"	10S	3,600	2,875	0.025"	1°	0.125"	6507K77	000000


		EPDM



				8 5/8"	11S	3,600	4,530	0.032"	1°	0.125"	6507K78	000000

Shock-Absorbing Grid Couplings

A strip of flexible spring steel (known as a grid) absorbs sudden load increases from motor startups, emergency braking, and other shock loads. They're commonly found in wire drawing and cutting machines, pulverizers, and mixers. For a complete coupling, select two hubs and a grid kit. Choose components of 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.

Black-Oxide Steel—Typically chosen for their appearance, these hubs have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.

For Shaft Type	Shaft Mount Type	Choose a Shaft Dia.		Each







Black-Oxide Steel

5 19/32"	1080T	7 1/8"	Keyed	Set Screw	2 7/8"	3395N76	0000000

Grid Kits

The grid wraps around the teeth of both hubs to spread the force of starts, stops, and reversals. When the shock load hits, the grid flexes to spread out the load. After the load passes, the grid straightens back out.

Spring Steel—Use these hard, rigid grids for high-stress applications. They're best for dry environments, since moisture will cause them to rust.

	Grid Kits									Replacement Grids		Replacement Seals		Additional Grease
					Misalignment Capability
	For Hub OD	Shaft Coupling Trade Size	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Includes		Each		Each		Each		Each
Spring Steel



		5 19/32"	1080T	3,600	18,150	0.016"	0.25°	One Grid, One Two-Piece Grid Cover, Two Paper Gaskets, Two Rubber Seals, Fasteners, Grease	3395N126	0000000	3395N117	0000000	3395N135	000000	8670T12	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.

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



		2 7/8"	4 1/4"	7/8"	Socket Head	2	6436K87	000000


		Zinc-Plated Carbon Steel



				2 7/8"	4 1/4"	7/8"	Socket Head	2	2380K59	000000


				Chrome-Plated Carbon Steel



						2 7/8"	4 1/4"	7/8"	Socket Head	2	3370K111	00000


						303 Stainless Steel



								2 7/8"	4 1/4"	7/8"	Socket Head	2	6436K118	000000


								316 Stainless Steel



										2 7/8"	4 1/4"	7/8"	Socket Head	2	9633T53	000000


										Aluminum



												2 7/8"	4 1/4"	7/8"	Socket Head	2	6436K171	00000

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



		2 7/8"	4 1/4"	7/8"	Hex Socket	1	Socket Head	2	1069N78	000000	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.

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



		2 7/8"	4 1/4"	1 1/8"	Hex Socket	1	9414T49	000000


		Zinc-Plated Carbon Steel



				2 7/8"	4"	1 1/8"	Hex Socket	1	6432K59	00000


				Aluminum



						2 7/8"	4"	1 1/8"	Hex Socket	1	9946K61	00000

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.

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



		2 7/8"	4 1/4"	7/8"	Socket Head	1	6435K225	000000


		303 Stainless Steel



				2 7/8"	4 1/4"	7/8"	Socket Head	1	6435K226	000000


				316 Stainless Steel



						2 7/8"	4 1/4"	7/8"	Socket Head	1	9421T49	000000


						Aluminum



								2 7/8"	4 1/4"	7/8"	Socket Head	1	6157K59	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.	OD	Wd.	Type	No. Included		Each
Black Anodized Aluminum



		2 7/8"	4 3/4"	3/4"	Socket Head	1	1511K253	0000000