Couplings for 40mm Shafts

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30 Products

About Shaft Couplings

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.

Buna-N spiders provide good vibration damping and chemical resistance. Hytrel spiders provide fair vibration damping and excellent chemical resistance.

For technical drawings and 3-D models, click on a part number.

Steel Hubs and Buna-N Rubber Spiders

							Buna-N Rubber Spiders
Steel Hubs									Misalignment Capability
Overall Lg., mm	OD, mm	For Shaft Type	For Motion Type	For Shaft Dia., mm		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F		Each
108	85	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	5,000	790	0.015"	1°	-40° to 212°	0000000	000000
115	96	Keyed	Forward/Reverse, Start/Stop	40	0000000	00000	5,000	1,240	0.015"	1°	-40° to 212°	0000000	00000
124	115	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	5,000	1,725	0.015"	1°	-40° to 212°	0000000	00000
137	127	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	4,200	2,340	0.015"	1°	-40° to 212°	0000000	00000

Steel Hubs and Hytrel Rubber Spiders

							Hytrel Rubber Spiders
Steel Hubs									Misalignment Capability
Overall Lg., mm	OD, mm	For Shaft Type	For Motion Type	For Shaft Dia., mm		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F		Each
108	85	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	3,600	2,265	0.015"	0.5°	-55° to 245°	0000000	0000000
115	96	Keyed	Forward/Reverse, Start/Stop	40	0000000	00000	3,600	3,705	0.015"	0.5°	-55° to 245°	0000000	000000
124	115	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	5,000	4,680	0.015"	0.5°	-55° to 245°	0000000	000000
137	127	Keyed	Forward/Reverse, Start/Stop	40	0000000	000000	4,200	6,225	0.015"	0.5°	-55° to 245°	0000000	000000

High-Torque Set Screw Flexible Shaft Couplings

(Each Component Sold Separately)

Hubs, Split Spider, and Split Spider Cover Shown Assembled

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. Spiders with medium-soft hardness are the most commonly used and are good for applications that start, stop, and reverse often. Those with medium hardness handle higher torque than those with medium-soft hardness, but they don’t reduce vibration as well.

Split spider covers hold the spider in place.

For technical drawings and 3-D models, click on a part number.

Steel Hubs and Medium-Soft (Durometer 48D) Spiders

						Urethane Split Spiders
Steel Hubs								Misalignment Capability						Steel Split Spider Covers
Overall Lg.	OD	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F	Color		Each		Each
4 29/32"	3 3/16"	Forward/Reverse, Start/Stop	40mm	000000	0000000	7,000	3,425	0.039"	2°	-60° to 212°	Red	0000000	000000	0000000	000000
6 1/16"	3 33/64"	Forward/Reverse, Start/Stop	40mm	000000	000000	6,000	7,065	0.038"	2°	-60° to 212°	Red	0000000	00000	0000000	000000

Steel Hubs and Medium (Durometer 60D) Spiders

						Urethane Split Spiders
Steel Hubs								Misalignment Capability						Steel Split Spider Covers
Overall Lg.	OD	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F	Color		Each		Each
4 29/32"	3 3/16"	Forward/Reverse, Start/Stop	40mm	000000	0000000	7,000	6,460	0.039"	2°	-60° to 212°	Blue	0000000	000000	0000000	000000
6 1/16"	3 33/64"	Forward/Reverse, Start/Stop	40mm	000000	000000	6,000	14,000	0.038"	2°	-60° to 212°	Blue	0000000	00000	0000000	000000

Steel Hubs and Medium (Durometer 60D) Spiders—350° F Max. Temp.

						Urethane Split Spiders
Steel Hubs								Misalignment Capability						Steel Split Spider Covers
Overall Lg.	OD	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F	Color		Each		Each
4 29/32"	3 3/16"	Forward/Reverse, Start/Stop	40mm	000000	0000000	7,000	6,460	0.039"	2°	-60° to 350°	White	0000000	0000000	0000000	000000
6 1/16"	3 33/64"	Forward/Reverse, Start/Stop	40mm	000000	000000	6,000	14,000	0.038"	2°	-60° to 350°	White	0000000	000000	0000000	000000

Machinable-Bore Clamping Shaft Couplings

For Keyed Shafts

For Round Shafts

When one of your shafts is undersized from wear, oversized from coatings, or uncommonly sized, machine one end of these couplings to fit. They clamp around your shafts for a secure hold that won’t cause damage. But, you’ll need access to the end of each shaft to slide them into place. Since they’re rigid, they prevent movement between the shafts, making them good for high-torque applications. This also means your shafts must align to connect.

Couplings for keyed shafts grip the shaft’s key to eliminate slipping. They handle higher torque than couplings for round shafts.

Steel couplings resist corrosion in dry environments.

For technical drawings and 3-D models, click on a part number.

Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed	Max. Torque, in.-lbs.	For Motion Type		Each
For Keyed Shafts
40mm × 12.500mm-40.000mm	90mm	60mm	Not Rated	4,055	Forward/Reverse, Start/Stop, Continuous	00000000	0000000
For Round Shafts
40mm × 12.500mm-40.000mm	90mm	60mm	Not Rated	3,040	Forward/Reverse, Start/Stop, Continuous	0000000	000000

High-Grip Clamping Shaft Couplings

For Keyed Shafts

These couplings have the gripping strength to handle higher torque than most other couplings. Couplings clamp evenly around the shaft to create a mar-free hold. Slide onto the end of your shaft and 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.

For technical drawings and 3-D models, click on a part number.

Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	For Motion Type		Each
For Keyed Shafts
40mm	90mm	60mm	Not Rated	Not Rated	Forward/Reverse, Start/Stop, Continuous	0000000	0000000

Set Screw Shaft Couplings

Slide these couplings onto the end of your shaft and tighten the set screws to secure. Set screws bite into the shaft to hold the coupling in place. Good for high-torque applications, rigid couplings connect two shafts that are aligned, allowing for no relative movement between the shafts.

Black-oxide steel couplings have some corrosion resistance.

Couplings with four set screws hold better than couplings with two set screws.

For technical drawings and 3-D models, click on a part number.

For Keyed Shafts

Black-Oxide 1215 Carbon Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	For Motion Type	Number of Set Screws Included		Each
For Keyed Shafts
40mm	108mm	77mm	4,000	Not Rated	Forward/Reverse, Start/Stop, Continuous	4	0000000	0000000

Two-Piece 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.

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.

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

303 stainless steel couplings resist corrosion, so they’re often used in wet conditions, such as with mixers and pumps.

For technical drawings and 3-D models, click on a part number.

For Keyed Shafts

For Round Shafts

Black-Oxide Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	For Motion Type		Each
For Keyed Shafts
40mm × 40mm	108mm	77mm	4,000	11,725	Forward/Reverse, Start/Stop, Continuous	00000000	0000000
303 Stainless Steel
For Round Shafts
40mm × 40mm	108mm	77mm	4,000	3,540	Forward/Reverse, Start/Stop, Continuous	00000000	00000000

High-Grip Two-Piece Shaft Couplings

For Keyed Shafts

These couplings have the gripping strength to handle higher torque than most other couplings. 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.

For technical drawings and 3-D models, click on a part number.

Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	For Motion Type		Each
For Keyed Shafts
40mm	90mm	60mm	Not Rated	Not Rated	Forward/Reverse, Start/Stop, Continuous	0000000	0000000

Three-Piece Shaft Couplings

For Round Shafts

Access one shaft without disconnecting the other. These rigid couplings have a solid bottom that connects the shafts and two top pieces that clamp the shafts independently.

Black-oxide steel couplings are stronger than stainless steel couplings but should be used in primarily dry environments since they may rust.

For technical drawings and 3-D models, click on a part number.

Black-Oxide Steel
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	For Motion Type		Each
For Round Shafts
40mm × 40mm	90mm	60mm	3,600	4,320	Forward/Reverse, Start/Stop, Continuous	0000000	0000000