Slit Shaft Couplings | McMaster-Carr

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System of Measurement

Shaft Diameter

Overall Length

For Shaft Misalignment Type

Shaft Mount Type

Material

Maximum Rotation Speed

For Rotary Motion

Length

Clamping Screw Material

18-8 Stainless Steel

303 Stainless Steel

Maximum Torque

Less than 10 in·lbf

10 in·lbf to 14 in·lbf

15 in·lbf to 24 in·lbf

25 in·lbf to 29 in·lbf

30 in·lbf or greater

Axial Misalignment Capability

Angular Misalignment Capability

Parallel Misalignment Capability

Rotation Speed

Set Screw Material

DFARS Specialty Metals

Exempt

RoHS

Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

Torque

Less than 10 in·lbf

10 in·lbf to 14 in·lbf

15 in·lbf to 24 in·lbf

25 in·lbf to 29 in·lbf

30 in·lbf or greater

Set Screw Drive Style

Drive Style

105 Products

Clamping Precision Flexible Shaft Couplings

Parallel Cut

Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft. Tighten the clamping screws to secure.

Parallel Cut—Parallel couplings have short, intermittent cuts that make them more rigid and able to handle more torque and speed than spiral couplings, but they’re worse at correcting misalignment. Use them in high-torque applications, such as linear test systems and scientific instruments. They’re sometimes called slit couplings.

7075 Aluminum—7075 aluminum couplings are lightweight with good corrosion resistance.

						Misalignment Capability
	For Shaft Diameter	Overall Lg.	OD	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	For Rotary Motion		Each
Parallel Cut







				7075 Aluminum

				1/8" × 3 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N423	0000000


				3/16" × 1/8"	21/32"	1/2"	12,000	7.1	0.003"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N489	000000
				3/16" × 3/16"	21/32"	1/2"	12,000	7.1	0.003"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N49	000000
				1/4" × 3/16"	21/32"	1/2"	12,000	7.1	0.003"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N492	000000
				1/4" × 1/4"	21/32"	1/2"	12,000	7.1	0.003"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N493	000000
				1/4" × 1/4"	25/32"	1/2"	12,000	7.1	0.006"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N451	000000
				1/4" × 1/4"	1 1/32"	25/32"	7,500	21.7	0.01"	3°	0.02"	Forward/Reverse, Start/Stop	8011N436	000000
				1/4" × 1/4"	1 11/32"	1"	5,000	34.5	0.016"	3°	0.028"	Forward/Reverse, Start/Stop	8011N44	000000
				1/4" × 3 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N366	000000
				1/4" × 5 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N368	000000
				1/4" × 5 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N303	000000


				1/4" × 5 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N314	000000
				1/4" × 5 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N334	000000
				1/4" × 6 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N369	000000
				1/4" × 6 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N38	000000
				5/16" × 1/4"	27/32"	25/32"	7,500	21.7	0.005"	3°	0.02"	Forward/Reverse, Start/Stop	8011N48	000000
				3/8" × 1/4"	1"	1"	5,000	34.5	0.016"	3°	0.028"	Forward/Reverse, Start/Stop	8011N485	000000
				3/8" × 3/8"	1"	1"	5,000	34.5	0.016"	3°	0.028"	Forward/Reverse, Start/Stop	8011N487	000000
				3/8" × 5 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N41	000000
				3/8" × 5 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N345	000000
				3/8" × 6 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N411	000000


				3/8" × 8 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N348	000000
				3 mm × 3 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N206	000000
				4 mm × 1/8"	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N426	000000
				4 mm × 4 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N208	000000
				4 mm × 4 mm	20 mm	13 mm	12,000	7.1	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N113	000000
				5 mm × 1/8"	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N427	000000
				5 mm × 1/8"	20 mm	13 mm	12,000	7.1	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N362	000000
				5 mm × 4 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N21	000000
				5 mm × 5 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N211	000000
				5 mm × 5 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N126	000000


				5 mm × 5 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N151	000000
				6 mm × 1/8"	20 mm	13 mm	12,000	7.1	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N364	000000
				6 mm × 3 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N222	000000
				6 mm × 3 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N127	000000
				6 mm × 5 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N214	000000
				6 mm × 5 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N248	000000
				6 mm × 6 mm	16.8 mm	13 mm	12,000	7.1	0.08 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N215	000000
				6 mm × 6 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N225	000000
				6 mm × 6 mm	20 mm	13 mm	12,000	7.1	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	8011N12	000000
				6 mm × 6 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N249	000000


				6 mm × 6 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N13	000000
				6 mm × 6 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N288	000000
				7 mm × 5 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N228	000000
				7 mm × 5 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N251	000000
7 mm × 7 mm				19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N23	000000
8 mm × 1/4"	25.8 mm			25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N419	000000
8 mm × 5/16"	34 mm			25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N355	000000
8 mm × 3 mm	23.5 mm			16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N136	000000
8 mm × 4 mm	19.8 mm			16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N232	000000
8 mm × 4 mm	26 mm	20 mm		7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N159	000000
8 mm × 5 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N233	000000
8 mm × 5 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N138	000000
8 mm × 5 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N16	000000
8 mm × 5 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N197	000000
8 mm × 6 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N256	000000
8 mm × 6 mm	23.5 mm	16 mm	10,000	11.1	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N139	000000
8 mm × 8 mm	19.8 mm	16 mm	10,000	11.1	0.1 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	8011N236	000000
8 mm × 8 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N258	000000
8 mm × 8 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N163	000000
9 mm × 5 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N26	000000
9 mm × 9 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N169	000000
10 mm × 1/4"	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N381	000000
10 mm × 1/4"	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N401	000000
10 mm × 1/4"	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N336	000000
10 mm × 3/8"	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N402	000000
10 mm × 3/8"	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N337	000000
10 mm × 5 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N144	000000
10 mm × 5 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N171	000000
10 mm × 6 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N145	000000
10 mm × 7 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N173	000000
10 mm × 8 mm	21.5 mm	20 mm	7,500	21.7	0.12 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N242	000000
10 mm × 10 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N265	000000
10 mm × 10 mm	26 mm	20 mm	7,500	21.7	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	8011N142	000000
10 mm × 10 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N17	000000
11 mm × 8 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N276	000000
12 mm × 1/4"	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N407	000000
12 mm × 1/4"	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N342	000000
12 mm × 5 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N281	000000
12 mm × 6 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N282	000000
12 mm × 6 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N187	000000
12 mm × 8 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N189	000000
12 mm × 9 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N19	000000
12 mm × 10 mm	34 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N183	000000
12 mm × 12 mm	25.8 mm	25 mm	5,000	34.5	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	8011N28	000000

Set Screw Precision Flexible Shaft Couplings

Tighten the set screws to fasten these couplings to your shaft. Set screws bite into the shaft to hold the couplings in place. All are lightweight, corrosion-resistant aluminum.

Parallel Cut—Parallel couplings have short, intermittent slits in the body that create rigidity and high torque capabilities. Able to handle higher speeds than spiral couplings, they’re often used in linear test systems and scientific instruments. They're also known as slit couplings. Parallel couplings do not handle misalignment as well as spiral couplings.

						Misalignment Capability
	For Shaft Diameter	Overall Lg.	OD	Max. Rotation Speed, rpm	Max. Torque, in·lbf	Parallel	Angular	Axial	For Rotary Motion		Each
Parallel Cut







				7075 Aluminum

				3/16" × 3 mm	20 mm	13 mm	20,000	10	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	4145N371	0000000


				1/4" × 1/4"	25/32"	1/2"	20,000	10.6	0.006"	2.5°	0.012"	Forward/Reverse, Start/Stop	8011N472	000000
				1/4" × 1/4"	1"	1"	15,000	46	0.006"	3°	0.028"	Forward/Reverse, Start/Stop	8011N503	000000
				1/4" × 3 mm	20 mm	13 mm	20,000	10	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	4145N365	000000
				1/4" × 5 mm	23.5 mm	16 mm	17,000	16	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	4145N312	000000
				1/4" × 6 mm	34 mm	25 mm	12,000	46	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	4145N342	000000
				5/16" × 1/4"	1 11/32"	1"	12,000	46	0.016"	3°	0.028"	Forward/Reverse, Start/Stop	8011N462	000000
				5/16" × 5/16"	27/32"	25/32"	20,000	28.8	0.005"	3°	0.02"	Forward/Reverse, Start/Stop	8011N502	000000
				3/8" × 3/8"	1 11/32"	1"	12,000	46	0.016"	3°	0.028"	Forward/Reverse, Start/Stop	8011N466	000000
				2 mm × 1.5 mm	12.5 mm	6 mm	32,000	2.2	0.04 mm	1.5°	0.06 mm	Forward/Reverse, Start/Stop	4145N194	000000
				3 mm × 3 mm	12.5 mm	6 mm	32,000	2.2	0.04 mm	1.5°	0.06 mm	Forward/Reverse, Start/Stop	4145N198	000000


				4 mm × 2 mm	14.5 mm	8 mm	24,000	4.4	0.1 mm	2°	0.1 mm	Forward/Reverse, Start/Stop	4145N203	000000
				6 mm × 6 mm	20 mm	13 mm	20,000	10	0.15 mm	2.5°	0.3 mm	Forward/Reverse, Start/Stop	4145N121	000000
				8 mm × 8 mm	23.5 mm	16 mm	17,000	16	0.2 mm	2.5°	0.4 mm	Forward/Reverse, Start/Stop	4145N137	000000
				10 mm × 1/4"	26 mm	20 mm	15,000	28	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	4145N324	000000
				10 mm × 3/8"	34 mm	25 mm	12,000	46	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	4145N344	000000
				10 mm × 6 mm	26 mm	20 mm	15,000	28	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	4145N141	000000
				10 mm × 10 mm	26 mm	20 mm	15,000	28	0.25 mm	3°	0.5 mm	Forward/Reverse, Start/Stop	4145N138	000000
				10 mm × 10 mm	34 mm	25 mm	12,000	46	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	4145N162	000000
				12 mm × 6 mm	34 mm	25 mm	12,000	46	0.4 mm	3°	0.7 mm	Forward/Reverse, Start/Stop	4145N177	000000