K-Couplings | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For Shaft Diameter For Shaft Diameter

	For Shaft Misalignment Type For Shaft Misalignment Type


Angular	Parallel

	Material Material

Steel

Stainless Steel

	Overall Length Overall Length

	Parallel Misalignment Capability Parallel Misalignment Capability

0.094"

0.125"

0.188"

	Angular Misalignment Capability Angular Misalignment Capability

10°

15°

	For Motion Type For Motion Type

Forward/Reverse

Start/Stop

	OD OD

	Maximum Torque Maximum Torque

	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

Forward

How can we improve?

119 Products

About Shaft Couplings

Also called double-loop couplings, these have a flexible center that reduces vibration and compensates for high parallel and angular shaft misalignment. They allow zero backlash (no play) and will run smoothly and quietly. Fasten to your shaft by tightening the set screws, which bite into the shaft to hold it.

Stainless steel couplings offer excellent corrosion resistance.

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

					Misalignment Capability
For Shaft Dia.	O'all Lg.	OD	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	For Motion Type	Center Material	Temp. Range, °F		Each
Zinc-Plated Steel
3/16" × 3/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	000000
3/16" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/4" × 1/4"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/4" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/4" × 3/8"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/4" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
5/16" × 5/16"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
5/16" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 3/8"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 3/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/2" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/2" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/2" × 1/2"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/2" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
1/2" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
5/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
5/8" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	0000000	00000
3mm × 3mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 4mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 4mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
11mm × 11mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
14mm × 14mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
14mm × 14mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
14mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
15mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
15mm × 15mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
16mm × 16mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
16mm × 16mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
316L Stainless Steel
3/16" × 3/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
3/16" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 1/4"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 1/4"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 3/8"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/4" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5/16" × 5/16"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5/16" × 5/16"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5/16" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
3/8" × 3/8"	1 1/8"	7/8"	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
3/8" × 3/8"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
3/8" × 3/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
3/8" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
3/8" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
3/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
1/2" × 1/2"	2"	1 11/16"	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
1/2" × 1/2"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
1/2" × 1/2"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
1/2" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
1/2" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
5/8" × 5/8"	2 1/4"	1 13/16"	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
5/8" × 5/8"	2 7/16"	2"	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
3mm × 3mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 4mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 4mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
4mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
5mm × 5mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 6mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
6mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
6mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	29mm	22mm	3,600	3	0.094"	10°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 8mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
8mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
8mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
10mm × 10mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 10mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 10mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
10mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
10mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
11mm × 11mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	51mm	43mm	3,600	12	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
12mm × 12mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
14mm × 14mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
14mm × 14mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
14mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
15mm × 15mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
15mm × 15mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000
16mm × 16mm	57mm	46mm	3,600	28	0.188"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	00000
16mm × 16mm	62mm	51mm	3,600	40	0.125"	15°	Forward/Reverse, Start/Stop	Polyurethane	0° to 180°	00000000	000000

Email Us

About Shaft Couplings

High-Misalignment Vibration-Damping Precision Flexible Shaft Couplings