Bushings for 2 1/8" Shafts

The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing trade number. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.

		Keyway
	Overall Wd.	Wd.	Dp.	Fastener Tightening Torque, in·lbf	Material	Includes	For Shaft Dia.		Each
Clamp-On Shaft Mount







				Bushing Trade Number SF

				2 1/16"	1/2"	1/4"	360	Sintered Steel	Clamping Screws	2 1/8"	6086K635	000000




						Bushing Trade Number SK

						1 15/16"	1/2"	1/4"	180	Sintered Steel	Clamping Screws	2 1/8"	6086K532	00000

Taper-Lock Bushings

Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing trade number. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.

			Keyway
	For Shaft Dia.	Overall Wd.	Wd.	Dp.	Taper	Fastener Tightening Torque, in·lbf	Includes		Each
Steel







				Bushing Trade Number 2012

				2 1/8"	1 1/4"	1/2"	3/16"	8°	280	Machine Key, Set Screws	57095K196	0000000




						Bushing Trade Number 2517

						2 1/8"	1 3/4"	1/2"	1/4"	8°	430	Set Screws	57095K217	00000




								Bushing Trade Number 3020

								2 1/8"	2"	1/2"	1/4"	8°	800	Set Screws	57095K337	000000

Oil-Embedded Thrust Bearings

Our simplest-to-use thrust bearings, with no moving parts and no need to lubricate. Their porous surface releases oil over time, so you can install and forget them. While they run in most conditions, oil may drip away if temperatures climb too high. For extremely hot environments, consider graphite-lubricated bearings. All are fabricated, lubricated, and inspected in the U.S.

841 Bearing Bronze—A balance of strength and speed makes these bearings a good choice for most applications. Also known as SAE 841 bearing bronze.

Synthetic Oil Base—A high-quality lubricant makes all the difference. Synthetic oil is less sensitive to temperature changes than mineral oil, so it won't get runny and leak away if the bearing heats up.

	OD	Thk.	Dynamic Thrust Load Cap. @ Speed	Base Oil	Temp. Range, ° F		Each
841 Bearing Bronze



	2 1/8"	4"	1/8"	14,000 lb. @ 30 rpm	Synthetic Oil	-35 to 300	5906K62	000000

Dry-Running Metal-Reinforced Plastic Thrust Bearings

Combine naturally slippery PTFE with the strength of metal. These bearings don't need lubricant, so there's no oil to maintain, drip off, or attract dust. Backed with steel, they're as strong as other all-metal thrust bearings. However, they're best for dry environments since moisture will cause the steel to rust.

	OD	Thk.	Dynamic Thrust Load Cap. @ Speed	Temp. Range, ° F		Each
Steel-Backed PTFE



	2 1/8"	3 1/8"	3/32"	17,100 lb. @ 30 rpm	-320 to 530	1262N38	000000

Hub-Mount Screw-Clamp Bushings

Transfer torque directly from a shaft to a hub. These bushings install over your hub to mount a sprocket, pulley, or gear to a shaft at the same time. Common in industrial gearbox applications, they can also connect a hollow shaft over a solid shaft. As screw-clamp bushings, they're good for shock loads. When you tighten the included clamping screws, the outer rings compress against a sprocket, pulley, or gear in between them, causing the inner rings to tighten around the shaft.

	OD	Overall Wd.	Max. Torque, in·lbf	Fastener Tightening Torque, in·lbf		Each
Zinc-Plated Steel



	2 1/8"	3 15/16"	1 5/16"	12,150	100	7654N16	0000000

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.		Each		Each







			Steel Hubs, Split Spiders

			4 29/32"	3 3/16"	Keyed	Forward/Reverse, Start/Stop	2 1/8"	3565N3	0000000	3565N63	000000


			6 1/16"	3 33/64"	Keyed	Forward/Reverse, Start/Stop	2 1/8"	3565N9	000000	3565N64	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

				6,000	7,065	0.038"	2°	-60 to 212	Red	3565N51	000000


				7,000	3,425	0.039"	2°	-60 to 212	Red	3565N47	00000


				Medium







								Durometer 60D

								6,000	14,000	0.038"	2°	-60 to 212	Blue	3565N53	00000


								6,000	14,000	0.038"	2°	-60 to 350	White	3565N52	000000
								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

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.

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 1/8"	3"	7/8"	Hex Socket	1	9414T38	000000


		Zinc-Plated Carbon Steel



				2 1/8"	3"	7/8"	Hex Socket	1	6432K52	00000


				303 Stainless Steel



						2 1/8"	3"	7/8"	Hex Socket	1	6462K52	00000


						Aluminum



								2 1/8"	3"	7/8"	Hex Socket	1	9946K51	00000

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.	OD	For Shaft Type	For Rotary Motion	For Shaft Dia.		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







			Iron Hubs

			4 7/8"	4 1/2"	Keyed	Forward/Reverse, Start/Stop	2 1/8"	6408K21	0000000	5,000	1,725	0.015"	1°	-40 to 212	Buna-N	6408K82	000000	5,000	4,680	0.015"	0.5°	-55 to 245	Hytrel	6408K99	0000000


			5 11/32"	5"	Keyed	Forward/Reverse, Start/Stop	2 1/8"	6408K22	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

Shaft Grounding Rings

Shaft Grounding Ring Shown

Installed

One Piece

Two Piece

Prevent motor downtime by protecting bearings from stray currents generated by variable frequency drives. These grounding rings create a path for stray currents, so they won't damage bearing surfaces. Use them on AC motors.

One Piece—One-piece rings slide on from the end of the shaft.

Two Piece—Two-piece rings simplify installation when motors are connected to equipment.

					One Piece		Two Piece
	For Shaft Dia.	For Motor Frame Size	Mounting Hardware Included	Includes		Each		Each
Aluminum



		2 1/8"	NEMA 324T, NEMA 326T, NEMA 404TS, NEMA 405TS	Yes	16 Brackets (4 each of 4 Common Styles)	4805N17	0000000	4805N28	0000000

Accessories for Grounding Rings

Conductive Adhesives

Image of Product. Front orientation. Grounding Rings.

Use adhesives to install rings without having to drill or tap into motor frames.

Container
Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Mix Ratio		Each
0.5	Adhesive	10	24	1:1	4805N33	0000000

Conductive Coatings

Apply conductive coatings to motor shafts before installing the rings to improve the conductivity of the steel shaft surface that touches the grounding ring.

Container		Dry Time
Size, fl. oz.	Type	Touch, min.	Overall, hr.	Max. Temp., ° F	Application Temp., ° F	Color		Each
0.5	Bottle	30	24	330	72 to 300	Gray	4805N34	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



		2 1/8"	4 3/4"	3/4"	Socket Head	1	1511K247	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



		2 1/8"	3 1/4"	3/4"	Hex Socket	1	Socket Head	2	1069N74	000000	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.

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 1/8"	3 1/4"	3/4"	Socket Head	1	6435K87	000000


		Aluminum



				2 1/8"	3 1/4"	3/4"	Socket Head	1	6157K46	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



		2 1/8"	3 1/4"	3/4"	Socket Head	2	6436K68	000000	1/2"	7/32"	3357K43	000000


		Zinc-Plated Carbon Steel



				2 1/8"	3 1/4"	3/4"	Socket Head	2	2380K46	00000	—	—	———	0


				Chrome-Plated Carbon Steel



						2 1/8"	3 1/4"	3/4"	Socket Head	2	3370K87	00000	—	—	———	0


						303 Stainless Steel



								2 1/8"	3 1/4"	3/4"	Socket Head	2	6436K105	00000	—	—	———	0


								316 Stainless Steel



										2 1/8"	3 1/4"	3/4"	Socket Head	2	9633T39	000000	—	—	———	0


										Aluminum



												2 1/8"	3 1/4"	3/4"	Socket Head	2	6436K157	00000	—	—	———	0