Bellows Shaft Couplings | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	Overall Length Overall Length

	Shaft Mount Type Shaft Mount Type


Clamp On	Set Screw

	For Shaft Misalignment Type For Shaft Misalignment Type


Angular	Axial

Parallel

	OD OD

	Material Material

Aluminum

Nickel

Stainless Steel

	Maximum Torque Maximum Torque

Less than 25 in.-lbs.

25 to 49 in.-lbs.

50 to 249 in.-lbs.

250 in.-lbs. or greater

	Angular Misalignment Capability Angular Misalignment Capability

	For Motion Type For Motion Type

Forward/Reverse

Start/Stop

	Axial Misalignment Capability Axial Misalignment Capability

	Maximum Speed Maximum Speed

10,000 rpm

Not Rated

	Parallel Misalignment Capability Parallel Misalignment Capability

	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

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

DFARS Specialty Metals
COTS-Exempt

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127 Products

About Shaft Couplings

With a bellows between two hubs, these couplings handle all types of misalignment and are good for precision stepper and encoder motion-control applications. All have lightweight aluminum hubs and a stainless steel bellows for corrosion resistance. Couplings allow zero backlash (no play) and grip evenly around your shaft for a strong hold without marring the shaft. Tighten the clamping screws to secure.

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

					Misalignment Capability
For Shaft Dia.	Overall Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	For Motion Type		Each
2024 Aluminum with 321 Stainless Steel Bellows
1/8" × 1/8"	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	0000000
3/16" × 3mm	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	000000
3/16" × 5mm	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 1/4"	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 1/4"	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 1/4"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	0000000	000000
1/4" × 3/8"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	0000000	000000
1/4" × 3mm	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 5mm	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 5mm	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 6mm	1 1/16"	19/32"	10,000	22	0.004"	1.5°	0.008"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 6mm	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 8mm	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 8mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/4" × 10mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
5/16" × 1/4"	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
5/16" × 5/16"	1 5/16"	3/4"	10,000	40	0.004"	1.5°	0.01"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 1/4"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 3/8"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 3/8"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 3/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	0000000	000000
3/8" × 6mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 8mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
3/8" × 10mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 1/4"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 1/4"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	0000000	000000
1/2" × 3/8"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 3/8"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 3/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	0000000	000000
1/2" × 1/2"	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 1/2"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 1/2"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	0000000	000000
1/2" × 1/2"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 6mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 8mm	1 11/32"	1"	10,000	60	0.004"	1.5°	0.012"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 8mm	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 10mm	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 10mm	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1/2" × 15mm	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 3/8"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 3/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 1/2"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 1/2"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 1/2"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 5/8"	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 5/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	0000000	000000
5/8" × 5/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 10mm	1 11/16"	1 5/16"	10,000	120	0.006"	1.5°	0.016"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 12mm	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
5/8" × 20mm	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 3/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 1/2"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 1/2"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 5/8"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 5/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 3/4"	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 3/4"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 10mm	2 1/32"	1 5/8"	10,000	250	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 12mm	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
3/4" × 25mm	3 1/4"	2 1/4"	10,000	530	0.012"	2°	0.03"	Forward/Reverse, Start/Stop	00000000	000000
7/8" × 1/2"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
7/8" × 5/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
7/8" × 3/4"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
7/8" × 7/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 1/2"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 5/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 3/4"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 7/8"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 1"	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 15mm	2 13/32"	2"	10,000	400	0.01"	2°	0.02"	Forward/Reverse, Start/Stop	00000000	000000
1" × 20mm	3 1/4"	2 1/4"	10,000	530	0.012"	2°	0.03"	Forward/Reverse, Start/Stop	00000000	000000
1 1/4" × 30mm	3 1/4"	2 1/4"	10,000	530	0.012"	2°	0.03"	Forward/Reverse, Start/Stop	00000000	000000
5mm × 3mm	27.3mm	15mm	10,000	22	0.1mm	1.5°	0.2mm	Forward/Reverse, Start/Stop	00000000	000000
5mm × 5mm	27.3mm	15mm	10,000	22	0.1mm	1.5°	0.2mm	Forward/Reverse, Start/Stop	00000000	000000
5mm × 5mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
6mm × 4mm	27.3mm	15mm	10,000	22	0.1mm	1.5°	0.2mm	Forward/Reverse, Start/Stop	00000000	000000
6mm × 5mm	27.3mm	15mm	10,000	22	0.1mm	1.5°	0.2mm	Forward/Reverse, Start/Stop	00000000	000000
6mm × 5mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
6mm × 6mm	27.3mm	15mm	10,000	22	0.1mm	1.5°	0.2mm	Forward/Reverse, Start/Stop	00000000	000000
6mm × 6mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 4mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 5mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 6mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 6mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 8mm	33.2mm	19.1mm	10,000	40	0.1mm	1.5°	0.25mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 8mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
8mm × 8mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
10mm × 6mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
10mm × 8mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
10mm × 10mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
10mm × 10mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
10mm × 10mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
12mm × 10mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
12mm × 12mm	34.2mm	25.4mm	10,000	60	0.1mm	1.5°	0.3mm	Forward/Reverse, Start/Stop	00000000	000000
12mm × 12mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
14mm × 10mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
14mm × 10mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
14mm × 12mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
14mm × 14mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
14mm × 14mm	61.3mm	50.8mm	10,000	400	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
15mm × 14mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
15mm × 14mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 8mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 10mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 10mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 15mm	61.3mm	50.8mm	10,000	400	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 16mm	43.2mm	33.3mm	10,000	120	0.15mm	1.5°	0.4mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 16mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
16mm × 16mm	82.2mm	57.2mm	10,000	530	0.3mm	2°	0.75mm	Forward/Reverse, Start/Stop	00000000	000000
20mm × 12mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
20mm × 14mm	51.7mm	41.3mm	10,000	250	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
20mm × 20mm	61.3mm	50.8mm	10,000	400	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
20mm × 20mm	82.2mm	57.2mm	10,000	530	0.3mm	2°	0.75mm	Forward/Reverse, Start/Stop	00000000	000000
25mm × 12mm	61.3mm	50.8mm	10,000	400	0.25mm	2°	0.5mm	Forward/Reverse, Start/Stop	00000000	000000
25mm × 20mm	82.2mm	57.2mm	10,000	530	0.3mm	2°	0.75mm	Forward/Reverse, Start/Stop	00000000	000000
30mm × 25mm	82.2mm	57.2mm	10,000	530	0.3mm	2°	0.75mm	Forward/Reverse, Start/Stop	00000000	000000
30mm × 30mm	82.2mm	57.2mm	10,000	530	0.3mm	2°	0.75mm	Forward/Reverse, Start/Stop	00000000	000000

High-Misalignment Precision Flexible Shaft Couplings

Specially designed ridges allow these bellows couplings to compensate for more misalignment than other precision couplings—useful for low-torque, high-precision applications such as instrumentation and motion control. They also allow zero backlash (no play) and never need lubrication. Couplings are nickel and stainless steel so they can be used in mildly corrosive environments. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.

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

					Misalignment Capability
For Shaft Dia.	Overall Lg.	OD	Max. Speed	Max. Torque, in.-lbs.	Parallel	Angular	Axial	For Motion Type		Each
303 Stainless Steel and Nickel Alloy
0.12"	35/64"	1/4"	Not Rated	0.7	0.007"	7°	0.023"	Forward/Reverse, Start/Stop	00000000	0000000
3/16"	37/64"	3/8"	Not Rated	1.6	0.009"	6°	0.03"	Forward/Reverse, Start/Stop	00000000	000000
3/16"	1 3/64"	3/8"	Not Rated	0.7	0.066"	17°	0.09"	Forward/Reverse, Start/Stop	00000000	000000
1/4"	47/64"	1/2"	Not Rated	6.1	0.01"	5°	0.038"	Forward/Reverse, Start/Stop	00000000	000000
1/4"	27/32"	1/2"	Not Rated	4.7	0.018"	9°	0.059"	Forward/Reverse, Start/Stop	00000000	000000
1/4"	1 3/32"	1/2"	Not Rated	3.1	0.044"	12°	0.082"	Forward/Reverse, Start/Stop	00000000	000000
1/4"	1 3/32"	3/4"	Not Rated	13.1	0.026"	7°	0.067"	Forward/Reverse, Start/Stop	00000000	000000
1/4"	1 11/32"	3/4"	Not Rated	9.9	0.046"	9°	0.096"	Forward/Reverse, Start/Stop	00000000	000000
5/16"	1 1/8"	1"	Not Rated	26.3	0.02"	5°	0.067"	Forward/Reverse, Start/Stop	00000000	000000
5/16"	1 41/64"	1"	Not Rated	14.2	0.068"	11°	0.149"	Forward/Reverse, Start/Stop	00000000	000000

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About Shaft Couplings

High-Speed Precision Flexible Shaft Couplings

High-Misalignment Precision Flexible Shaft Couplings