Machinable Couplings | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	For Shaft Type For Shaft Type

	Round
	Keyed

	Material Material

Steel

Iron

Stainless Steel

	Shaft Mount Type Shaft Mount Type

Clamp On

Set Screw

Spring Pin

	Construction Construction

One Piece

Multipiece

	For Motion Type For Motion Type

Forward/Reverse

Start/Stop

Continuous

	Overall Length Overall Length

	For Shaft Misalignment Type For Shaft Misalignment Type


None	Angular

Parallel

	OD OD

	Clamping Screw Material Clamping Screw Material

Steel

Stainless Steel

	Keyway Width Keyway Width

	Shaft Coupling Type Shaft Coupling Type

Flexible

Rigid

	For Maximum Shaft Diameter For Maximum Shaft Diameter

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Torque Maximum Torque

Less than 1,000 in.-lbs.

1,000 to 1,999 in.-lbs.

2,000 to 2,999 in.-lbs.

3,000 to 3,999 in.-lbs.

4,000 in.-lbs. or greater

	End Type End Type


Straight	Flanged

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Keyway Depth Keyway Depth

	Maximum Speed Maximum Speed

1,750 rpm

Not Rated

	For Set Screw Thread Size For Set Screw Thread Size

	Hardness Hardness

Rockwell B75

Rockwell B84

Rockwell B85

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182 Products

About Shaft Couplings

About U-Joints (Universal Joints)

U-joints are used to connect two shafts that have a high amount of misalignment.

For Keyed Shafts

For Round Shafts

One end has a finished bore size; the other can be machined to any size—great for connecting to uncommon shaft sizes and shafts that are undersized from wear or oversized from coatings. Slide these couplings onto your shafts and tighten the clamping screws for a secure hold that won’t damage the shafts. All of these couplings are rigid and must be used on aligned shafts. They prevent movement between the shafts, so they can handle high-torque applications.

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

Steel couplings are a good option in dry environments.

303 stainless steel couplings resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.

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
1/2" × 0.235"-0.500"	1 7/8"	1 1/4"	Not Rated	380	Forward/Reverse, Start/Stop, Continuous	0000000	000000
5/8" × 0.235"-0.625"	2 1/4"	1 1/2"	Not Rated	785	Forward/Reverse, Start/Stop, Continuous	0000000	00000
3/4" × 0.235"-0.750"	2 5/8"	1 3/4"	Not Rated	1,505	Forward/Reverse, Start/Stop, Continuous	0000000	00000
7/8" × 0.235"-0.875"	2 7/8"	1 7/8"	Not Rated	1,760	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1" × 0.360"-1.000"	3"	2"	Not Rated	2,010	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/8" × 0.360"-1.125"	3 1/4"	2 1/8"	Not Rated	2,260	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/4" × 0.360"-1.250"	3 3/8"	2 1/4"	Not Rated	2,510	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 3/8" × 0.360"-1.375"	3 5/8"	2 3/8"	Not Rated	2,770	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/2" × 0.485"-1.500"	3 3/4"	2 1/2"	Not Rated	3,020	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 3/4" × 0.485"-1.750"	4 1/2"	3"	Not Rated	5,625	Forward/Reverse, Start/Stop, Continuous	0000000	000000
2" × 0.485"-2.000"	4 7/8"	3 1/4"	Not Rated	6,430	Forward/Reverse, Start/Stop, Continuous	0000000	000000
8mm × 6.000mm-8.000mm	30mm	18mm	Not Rated	225	Forward/Reverse, Start/Stop, Continuous	00000000	00000
10mm × 6.000mm-10.000mm	35mm	24mm	Not Rated	285	Forward/Reverse, Start/Stop, Continuous	00000000	00000
12mm × 6.000mm-12.000mm	45mm	28mm	Not Rated	545	Forward/Reverse, Start/Stop, Continuous	00000000	00000
16mm × 6.000mm-16.000mm	50mm	34mm	Not Rated	1,095	Forward/Reverse, Start/Stop, Continuous	00000000	00000
20mm × 6.000mm-20.000mm	65mm	40mm	Not Rated	2,025	Forward/Reverse, Start/Stop, Continuous	00000000	00000
25mm × 9.500mm-25.000mm	65mm	45mm	Not Rated	2,535	Forward/Reverse, Start/Stop, Continuous	00000000	00000
30mm × 9.500mm-30.000mm	75mm	54mm	Not Rated	5,420	Forward/Reverse, Start/Stop, Continuous	00000000	00000
35mm × 9.500mm-35.000mm	80mm	57mm	Not Rated	3,550	Forward/Reverse, Start/Stop, Continuous	00000000	000000
40mm × 12.500mm-40.000mm	90mm	60mm	Not Rated	4,055	Forward/Reverse, Start/Stop, Continuous	00000000	000000
For Round Shafts
1/2" × 0.235"-0.500"	1 7/8"	1 1/4"	Not Rated	285	Forward/Reverse, Start/Stop, Continuous	0000000	00000
5/8" × 0.235"-0.625"	2 1/4"	1 1/2"	Not Rated	490	Forward/Reverse, Start/Stop, Continuous	0000000	00000
3/4" × 0.235"-0.750"	2 5/8"	1 3/4"	Not Rated	1,130	Forward/Reverse, Start/Stop, Continuous	0000000	00000
7/8" × 0.235"-0.875"	2 7/8"	1 7/8"	Not Rated	1,320	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1" × 0.360"-1.000"	3"	2"	Not Rated	1,510	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/8" × 0.360"-1.125"	3 1/4"	2 1/8"	Not Rated	1,695	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/4" × 0.360"-1.250"	3 3/8"	2 1/4"	Not Rated	1,885	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 3/8" × 0.360"-1.375"	3 5/8"	2 3/8"	Not Rated	2,080	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 1/2" × 0.485"-1.500"	3 3/4"	2 1/2"	Not Rated	2,265	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1 3/4" × 0.485"-1.750"	4 1/2"	3"	Not Rated	4,220	Forward/Reverse, Start/Stop, Continuous	0000000	00000
2" × 0.485"-2.000"	4 7/8"	3 1/4"	Not Rated	4,825	Forward/Reverse, Start/Stop, Continuous	0000000	00000
8mm × 6.000mm-8.000mm	30mm	18mm	Not Rated	170	Forward/Reverse, Start/Stop, Continuous	0000000	00000
10mm × 6.000mm-10.000mm	35mm	24mm	Not Rated	210	Forward/Reverse, Start/Stop, Continuous	0000000	00000
12mm × 6.000mm-12.000mm	45mm	28mm	Not Rated	405	Forward/Reverse, Start/Stop, Continuous	0000000	00000
16mm × 6.000mm-16.000mm	50mm	34mm	Not Rated	820	Forward/Reverse, Start/Stop, Continuous	0000000	00000
20mm × 6.000mm-20.000mm	65mm	40mm	Not Rated	1,520	Forward/Reverse, Start/Stop, Continuous	0000000	00000
25mm × 9.500mm-25.000mm	65mm	45mm	Not Rated	1,900	Forward/Reverse, Start/Stop, Continuous	0000000	00000
30mm × 9.500mm-30.000mm	75mm	54mm	Not Rated	4,065	Forward/Reverse, Start/Stop, Continuous	0000000	00000
35mm × 9.500mm-35.000mm	80mm	57mm	Not Rated	2,660	Forward/Reverse, Start/Stop, Continuous	0000000	00000
40mm × 12.500mm-40.000mm	90mm	60mm	Not Rated	3,040	Forward/Reverse, Start/Stop, Continuous	0000000	000000
303 Stainless Steel
For Keyed Shafts
1/2" × 0.235"-0.500"	1 7/8"	1 1/4"	Not Rated	260	Forward/Reverse, Start/Stop, Continuous	0000000	00000
5/8" × 0.235"-0.625"	2 1/4"	1 1/2"	Not Rated	540	Forward/Reverse, Start/Stop, Continuous	0000000	00000
3/4" × 0.235"-0.750"	2 5/8"	1 3/4"	Not Rated	1,035	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1" × 0.360"-1.000"	3"	2"	Not Rated	1,380	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 1/8" × 0.360"-1.125"	3 1/4"	2 1/8"	Not Rated	1,550	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 1/4" × 0.360"-1.250"	3 3/8"	2 1/4"	Not Rated	1,725	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 1/2" × 0.485"-1.500"	3 3/4"	2 1/2"	Not Rated	2,075	Forward/Reverse, Start/Stop, Continuous	0000000	000000
10mm × 6.000mm-10.000mm	35mm	24mm	Not Rated	65	Forward/Reverse, Start/Stop, Continuous	00000000	00000
12mm × 6.000mm-12.000mm	45mm	28mm	Not Rated	240	Forward/Reverse, Start/Stop, Continuous	00000000	00000
16mm × 6.000mm-16.000mm	50mm	34mm	Not Rated	485	Forward/Reverse, Start/Stop, Continuous	00000000	00000
20mm × 6.000mm-20.000mm	65mm	40mm	Not Rated	900	Forward/Reverse, Start/Stop, Continuous	00000000	000000
For Round Shafts
1/2" × 0.235"-0.500"	1 7/8"	1 1/4"	Not Rated	195	Forward/Reverse, Start/Stop, Continuous	0000000	00000
5/8" × 0.235"-0.625"	2 1/4"	1 1/2"	Not Rated	405	Forward/Reverse, Start/Stop, Continuous	0000000	00000
3/4" × 0.235"-0.750"	2 5/8"	1 3/4"	Not Rated	775	Forward/Reverse, Start/Stop, Continuous	0000000	00000
7/8" × 0.235"-0.875"	2 7/8"	1 7/8"	Not Rated	905	Forward/Reverse, Start/Stop, Continuous	0000000	00000
1" × 0.360"-1.000"	3"	2"	Not Rated	1,035	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 1/4" × 0.360"-1.250"	3 3/8"	2 1/4"	Not Rated	1,295	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 1/2" × 0.485"-1.500"	3 3/4"	2 1/2"	Not Rated	1,555	Forward/Reverse, Start/Stop, Continuous	0000000	000000
1 3/4" × 0.485"-1.750"	4 1/2"	3"	Not Rated	2,900	Forward/Reverse, Start/Stop, Continuous	0000000	000000
8mm × 6.000mm-8.000mm	30mm	18mm	Not Rated	35	Forward/Reverse, Start/Stop, Continuous	00000000	00000
10mm × 6.000mm-10.000mm	35mm	24mm	Not Rated	45	Forward/Reverse, Start/Stop, Continuous	00000000	00000
12mm × 6.000mm-12.000mm	45mm	28mm	Not Rated	180	Forward/Reverse, Start/Stop, Continuous	00000000	00000
16mm × 6.000mm-16.000mm	50mm	34mm	Not Rated	365	Forward/Reverse, Start/Stop, Continuous	00000000	00000
20mm × 6.000mm-20.000mm	65mm	40mm	Not Rated	675	Forward/Reverse, Start/Stop, Continuous	00000000	00000

Machinable-Bore Flexible Shaft Couplings

(Each Component Sold Separately)

Hubs and Spider Shown Assembled

Customize the bore of these flexible couplings to align uncommon shaft sizes as well as shafts that have become undersized from wear or oversized from coatings. 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 (all components sold separately). Fasten to your shaft with set screws (not included), which bite into the shaft for a secure hold. If the spider fails, the hubs will lock together, giving you time to shut down your equipment to prevent component damage and replace the spider. These couplings do not need lubrication.

Buna-N spiders are the most commonly used because they damp the most vibration, making them best for forward/reverse and start/stop motion. They resist oil and chemicals.

Polyurethane spiders can run at a higher torque than Buna-N spiders, but do not offer as much vibration damping. Use them for continuous motion. Similar to Buna-N, they resist oil and chemicals.

Hytrel spiders operate at the highest torque, but are less flexible than Buna-N and polyurethane spiders so they have less misalignment and vibration damping capabilities. Use them for continuous motion. Compared to Buna-N and polyurethane, these have the best oil and chemical resistance.

Iron Hubs and Buna-N Spiders

Iron Hubs									Buna-N Spiders
					For Set Screw						Misalignment Capability
For Shaft Dia.	Overall Lg.	OD	For Motion Type	Material	Type	Thread Size		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F		Each
1/4"-5/8"	1 23/32"	1 5/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	1/4"-20	00000000	00000	18,000	26	0.015"	1°	-40° to 212°	0000000	00000
1/4"-3/4"	1 63/64"	1 23/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	1/4"-20	00000000	00000	14,000	43	0.015"	1°	-40° to 212°	0000000	0000
1/4"-7/8"	2 1/8"	1 3/4"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	1/4"-20	00000000	00000	11,000	90	0.015"	1°	-40° to 212°	0000000	00000
1/4"-1"	2 5/32"	2 7/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	1/4"-20	00000000	00000	9,000	140	0.015"	1°	-40° to 212°	0000000	00000
7/16"-1 1/8"	2 1/2"	2 7/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	5/16"-18	00000000	00000	9,000	140	0.015"	1°	-40° to 212°	0000000	00000
7/16"-1 3/16"	2 27/32"	2 35/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	5/16"-18	00000000	00000	7,000	315	0.015"	1°	-40° to 212°	0000000	00000
7/16"-1 3/8"	3 31/64"	2 35/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	5/16"-18	00000000	00000	7,000	315	0.015"	1°	-40° to 212°	0000000	00000
5/8"-1 5/8"	4 7/32"	3 21/64"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	5/16"-18	00000000	00000	5,000	790	0.015"	1°	-40° to 212°	0000000	00000
5/8"-1 7/8"	4 1/2"	3 3/4"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	3/8"-16	00000000	00000	5,000	1,240	0.015"	1°	-40° to 212°	0000000	00000
3/4"-2 1/8"	4 7/8"	4 1/2"	Forward/Reverse, Start/Stop	Sintered Iron	Cup Point	1/2"-13	00000000	000000	5,000	1,725	0.015"	1°	-40° to 212°	0000000	00000
3/4"-2 5/8"	5 11/32"	5"	Forward/Reverse, Start/Stop	Cast Iron	Cup Point	1/2"-13	00000000	000000	4,200	2,340	0.015"	1°	-40° to 212°	0000000	00000

Iron Hubs and Polyurethane Spiders

Iron Hubs									Polyurethane Spiders
					For Set Screw						Misalignment Capability
For Shaft Dia.	Overall Lg.	OD	For Motion Type	Material	Type	Thread Size		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F		Each
1/4"-7/8"	2 1/8"	1 3/4"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	000000	3,600	135	0.015"	1°	-30° to 160°	0000000	000000
1/4"-1"	2 5/32"	2 7/64"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	00000	3,600	210	0.015"	1°	-30° to 160°	0000000	00000
7/16"-1 1/8"	2 1/2"	2 7/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	210	0.015"	1°	-30° to 160°	0000000	00000
7/16"-1 3/16"	2 27/32"	2 35/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	475	0.015"	1°	-30° to 160°	0000000	00000
7/16"-1 3/8"	3 31/64"	2 35/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	475	0.015"	1°	-30° to 160°	0000000	00000
5/8"-1 5/8"	4 7/32"	3 21/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	1,185	0.015"	1°	-30° to 160°	0000000	000000
5/8"-1 7/8"	4 1/2"	3 3/4"	Continuous	Sintered Iron	Cup Point	3/8"-16	00000000	00000	3,600	1,860	0.015"	1°	-30° to 160°	0000000	00000

Iron Hubs and Hytrel Spiders

Iron Hubs									Hytrel Spiders
					For Set Screw						Misalignment Capability
For Shaft Dia.	Overall Lg.	OD	For Motion Type	Material	Type	Thread Size		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Temp. Range, °F		Each
1/4"-5/8"	1 23/32"	1 5/64"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	00000	18,000	50	0.015"	0.5°	-55° to 245°	0000000	000000
1/4"-3/4"	1 63/64"	1 23/64"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	00000	3,600	110	0.015"	0.5°	-55° to 245°	0000000	00000
1/4"-7/8"	2 1/8"	1 3/4"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	00000	3,600	225	0.015"	0.5°	-55° to 245°	0000000	00000
1/4"-1"	2 5/32"	2 7/64"	Continuous	Sintered Iron	Cup Point	1/4"-20	00000000	00000	3,600	400	0.015"	0.5°	-55° to 245°	0000000	00000
7/16"-1 1/8"	2 1/2"	2 7/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	400	0.015"	0.5°	-55° to 245°	0000000	00000
7/16"-1 3/16"	2 27/32"	2 35/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	790	0.015"	0.5°	-55° to 245°	0000000	000000
7/16"-1 3/8"	3 31/64"	2 35/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	790	0.015"	0.5°	-55° to 245°	0000000	000000
5/8"-1 5/8"	4 7/32"	3 21/64"	Continuous	Sintered Iron	Cup Point	5/16"-18	00000000	00000	3,600	2,265	0.015"	0.5°	-55° to 245°	0000000	000000
5/8"-1 7/8"	4 1/2"	3 3/4"	Continuous	Sintered Iron	Cup Point	3/8"-16	00000000	00000	3,600	3,705	0.015"	0.5°	-55° to 245°	0000000	000000
3/4"-2 1/8"	4 7/8"	4 1/2"	Continuous	Sintered Iron	Cup Point	1/2"-13	00000000	000000	5,000	4,680	0.015"	0.5°	-55° to 245°	0000000	000000
3/4"-2 5/8"	5 11/32"	5"	Continuous	Cast Iron	Cup Point	1/2"-13	00000000	000000	4,200	6,225	0.015"	0.5°	-55° to 245°	0000000	000000

Machinable-Bore Single U-Joints

Customize the bore size of these joints to fit your shaft. Each end has a small centered starter hole that makes drilling easy. Connect by drilling a hole through the joint and shaft and inserting a spring pin (not included). All have grooves for holding protective boots (not included).

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

							Torque
For Max. Shaft Dia.	For Max. Shaft Dp.	Joint Dia.	Overall Lg.	Max. Operating Angle	Max. Speed, rpm	Max. Torque, in.-lbs.	3° Operating Angle	10° Operating Angle	Joint Type		Each
Steel
3/8"	5/8"	1/2"	2"	25°	1,750	375	150 in.-lbs. @ 300 rpm	51 in.-lbs. @ 300 rpm	Pin and Block	0000000	000000
1/2"	11/16"	5/8"	2 1/4"	25°	1,750	540	245 in.-lbs. @ 300 rpm	83 in.-lbs. @ 300 rpm	Pin and Block	0000000	00000
5/8"	7/8"	3/4"	2 11/16"	25°	1,750	765	330 in.-lbs. @ 300 rpm	110 in.-lbs. @ 300 rpm	Pin and Block	0000000	00000

Machinable-Bore Double U-Joints

Customize the bore size of these joints to fit your shaft. Each end has a small centered starter hole that makes drilling easy. To connect, drill a hole through the joint and shaft and insert a spring pin (not included). All have grooves for holding protective boots (not included).

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

							Torque
For Max. Shaft Dia.	For Max. Shaft Dp.	Joint Dia.	Overall Lg.	Max. Operating Angle	Max. Speed, rpm	Max. Torque, in.-lbs.	3° Operating Angle	10° Operating Angle	Parallel Misalignment Capability	Joint Type		Each
Steel
3/8"	5/8"	1/2"	4"	25°	1,750	375	150 in.-lbs. @ 300 rpm	51 in.-lbs. @ 300 rpm	0.845"	Pin and Block	0000000	0000000
1/2"	11/16"	5/8"	4 1/2"	25°	1,750	540	245 in.-lbs. @ 300 rpm	83 in.-lbs. @ 300 rpm	0.951"	Pin and Block	0000000	000000
5/8"	7/8"	3/4"	5 3/8"	25°	1,750	765	330 in.-lbs. @ 300 rpm	110 in.-lbs. @ 300 rpm	1.133"	Pin and Block	0000000	000000
11/16"	7/8"	7/8"	6"	25°	1,750	1,175	445 in.-lbs. @ 300 rpm	150 in.-lbs. @ 300 rpm	1.268"	Pin and Block	0000000	000000
3/4"	1"	1"	6 3/4"	25°	1,750	1,560	595 in.-lbs. @ 300 rpm	200 in.-lbs. @ 300 rpm	1.428"	Pin and Block	0000000	000000
1"	1 1/16"	1 1/4"	7 1/2"	25°	1,750	5,220	980 in.-lbs. @ 300 rpm	330 in.-lbs. @ 300 rpm	1.585"	Pin and Block	0000000	000000
1 1/8"	1 3/16"	1 1/2"	8 1/2"	25°	1,750	7,920	1,425 in.-lbs. @ 300 rpm	480 in.-lbs. @ 300 rpm	1.796"	Pin and Block	0000000	000000

Machinable Shaft Ends

One side is unfinished for milling custom pulleys, threaded hubs, sprockets, collars, knobs, sensor targets, or just about anything imaginable; the other side is a one-piece clamping coupling for mounting whatever you’ve created to your shaft. Slide these ends onto your shaft and tighten the clamping screws for a secure hold that won’t damage your shaft.

Use flanged ends to make objects with larger ODs than straight ends, or add mounting holes to create a custom mounting flange for connecting components.

Ends for keyed shafts have keyways that firmly grip the shaft’s key to eliminate slipping. They handle higher torque than ends for round shafts.

Carbon steel ends are easier to machine than stainless steel. They have a black-oxide finish that adds a layer of rust resistance but should be used in primarily dry environments.

Stainless steel ends provide the most corrosion resistance but are more difficult to machine than steel.

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

Straight

Front

Back

For Keyed Shafts

For Round Shafts

Black-Oxide 1215 Carbon Steel
For Shaft Dia.	Overall Lg.	OD	For Motion Type		Each
For Keyed Shafts
1/2"	2 3/4"	1 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
5/8"	3 1/4"	1 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	4 1/4"	1 3/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
7/8"	4 3/8"	1 7/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1"	4 3/4"	2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/8"	4 3/4"	2 1/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/4"	5"	2 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 3/8"	5"	2 3/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/2"	5 3/8"	2 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 3/4"	6"	3"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
2"	6 3/4"	3 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
For Round Shafts
1/2"	2 3/4"	1 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
5/8"	3 1/4"	1 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	4 1/4"	1 3/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
7/8"	4 3/8"	1 7/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1"	4 3/4"	2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/8"	4 3/4"	2 1/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/4"	5"	2 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 3/8"	5"	2 3/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/2"	5 3/8"	2 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 3/4"	6"	3"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
2"	6 3/4"	3 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
303 Stainless Steel
For Keyed Shafts
1/2"	2 3/4"	1 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
5/8"	3 1/4"	1 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	4 1/4"	1 3/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
7/8"	4 3/8"	1 7/8"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1"	4 3/4"	2"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 1/8"	4 3/4"	2 1/8"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 1/4"	5"	2 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 3/8"	5"	2 3/8"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 1/2"	5 3/8"	2 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 3/4"	6"	3"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
2"	6 3/4"	3 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
For Round Shafts
1/2"	2 3/4"	1 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
5/8"	3 1/4"	1 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	4 1/4"	1 3/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
7/8"	4 3/8"	1 7/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1"	4 3/4"	2"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/8"	4 3/4"	2 1/8"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 1/4"	5"	2 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1 3/8"	5"	2 3/8"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 1/2"	5 3/8"	2 1/2"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1 3/4"	6"	3"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
2"	6 3/4"	3 1/4"	Continuous, Forward/Reverse, Start/Stop	0000000	000000

Flanged

For Keyed Shafts

For Round Shafts

Black-Oxide 1117 Carbon Steel
For Shaft Dia.	Overall Lg.	OD	Flange OD	For Motion Type		Each
For Keyed Shafts
1/2"	1 11/16"	1 1/4"	2 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
3/4"	2 1/16"	1 3/4"	2 63/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1"	2 1/4"	2"	3 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
For Round Shafts
1/2"	1 11/16"	1 1/4"	2 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	2 1/16"	1 3/4"	2 63/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
1"	2 1/4"	2"	3 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
303 Stainless Steel
For Keyed Shafts
1/2"	1 11/16"	1 1/4"	2 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	2 1/16"	1 3/4"	2 63/64"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1"	2 1/4"	2"	3 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
For Round Shafts
1/2"	1 11/16"	1 1/4"	2 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	00000
3/4"	2 1/16"	1 3/4"	2 63/64"	Continuous, Forward/Reverse, Start/Stop	0000000	000000
1"	2 1/4"	2"	3 15/64"	Continuous, Forward/Reverse, Start/Stop	0000000	000000

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About Shaft Couplings

About U-Joints (Universal Joints)

Machinable-Bore Clamping Shaft Couplings

Machinable-Bore Flexible Shaft Couplings

Machinable-Bore Single U-Joints

Machinable-Bore Double U-Joints

Machinable Shaft Ends