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About Shaft Couplings
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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 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.
Aluminum couplings are lightweight with good corrosion resistance.
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 | |
Parallel Cut | ||||||||||
7075 Aluminum  | ||||||||||
| 1/8" × 3mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
| 3/16" × 1/8" | 21/32" | 1/2" | 12,000 | 7.1 | 0.003" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/16" × 3/16" | 21/32" | 1/2" | 12,000 | 7.1 | 0.003" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 1/4" × 3/16" | 21/32" | 1/2" | 12,000 | 7.1 | 0.003" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 1/4" | 21/32" | 1/2" | 12,000 | 7.1 | 0.003" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 1/4" | 25/32" | 1/2" | 12,000 | 7.1 | 0.006" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 1/4" | 1 1/32" | 25/32" | 7,500 | 21.7 | 0.01" | 3° | 0.02" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 1/4" | 1 11/32" | 1" | 5,000 | 34.5 | 0.016" | 3° | 0.028" | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 1/4" × 3mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 5mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 5mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 5mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 5mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 6mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 6mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 5/16" × 1/4" | 27/32" | 25/32" | 7,500 | 21.7 | 0.005" | 3° | 0.02" | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 3/8" × 1/4" | 1" | 1" | 5,000 | 34.5 | 0.016" | 3° | 0.028" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/8" × 3/8" | 1" | 1" | 5,000 | 34.5 | 0.016" | 3° | 0.028" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/8" × 5mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 3/8" × 5mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/8" × 6mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/8" × 8mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3mm × 3mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 4mm × 1/8" | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 4mm × 4mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 4mm × 4mm | 20mm | 13mm | 12,000 | 7.1 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5mm × 1/8" | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5mm × 1/8" | 20mm | 13mm | 12,000 | 7.1 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5mm × 4mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 5mm × 5mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5mm × 5mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5mm × 5mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 1/8" | 20mm | 13mm | 12,000 | 7.1 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 3mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 3mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 5mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 5mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 6mm | 16.8mm | 13mm | 12,000 | 7.1 | 0.08mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 6mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 6mm | 20mm | 13mm | 12,000 | 7.1 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 6mm × 6mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 6mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 6mm × 6mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 7mm × 5mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 7mm × 5mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 7mm × 7mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 8mm × 1/4" | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 5/16" | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 3mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 4mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 4mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 5mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 5mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 5mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 8mm × 5mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 6mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 6mm | 23.5mm | 16mm | 10,000 | 11.1 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 8mm | 19.8mm | 16mm | 10,000 | 11.1 | 0.1mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 8mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 8mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 9mm × 5mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 9mm × 9mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 1/4" | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 1/4" | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 1/4" | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 3/8" | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 3/8" | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 5mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 5mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 6mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 7mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 8mm | 21.5mm | 20mm | 7,500 | 21.7 | 0.12mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 10mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 10mm | 26mm | 20mm | 7,500 | 21.7 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 10mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 11mm × 8mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 1/4" | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 1/4" | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 5mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 6mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 6mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 8mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 9mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 0000000 | 000000 |
| 12mm × 10mm | 34mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 12mm | 25.8mm | 25mm | 5,000 | 34.5 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 0000000 | 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 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.
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 | |
Parallel Cut | ||||||||||
7075 Aluminum | ||||||||||
| 3/16" × 3mm | 20mm | 13mm | 20,000 | 10 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 0000000 |
| 1/4" × 1/4" | 25/32" | 1/2" | 20,000 | 10.6 | 0.006" | 2.5° | 0.012" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 1/4" | 1" | 1" | 15,000 | 46 | 0.006" | 3° | 0.028" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 3mm | 20mm | 13mm | 20,000 | 10 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 5mm | 23.5mm | 16mm | 17,000 | 16 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 1/4" × 6mm | 34mm | 25mm | 12,000 | 46 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/16" × 1/4" | 1 11/32" | 1" | 12,000 | 46 | 0.016" | 3° | 0.028" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 5/16" × 5/16" | 27/32" | 25/32" | 20,000 | 28.8 | 0.005" | 3° | 0.02" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3/8" × 3/8" | 1 11/32" | 1" | 12,000 | 46 | 0.016" | 3° | 0.028" | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 2mm × 1.5mm | 12.5mm | 6mm | 32,000 | 2.2 | 0.04mm | 1.5° | 0.06mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 3mm × 3mm | 12.5mm | 6mm | 32,000 | 2.2 | 0.04mm | 1.5° | 0.06mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 4mm × 2mm | 14.5mm | 8mm | 24,000 | 4.4 | 0.1mm | 2° | 0.1mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 6mm × 6mm | 20mm | 13mm | 20,000 | 10 | 0.15mm | 2.5° | 0.3mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 8mm × 8mm | 23.5mm | 16mm | 17,000 | 16 | 0.2mm | 2.5° | 0.4mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 1/4" | 26mm | 20mm | 15,000 | 28 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 3/8" | 34mm | 25mm | 12,000 | 46 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 6mm | 26mm | 20mm | 15,000 | 28 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 10mm | 26mm | 20mm | 15,000 | 28 | 0.25mm | 3° | 0.5mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 10mm × 10mm | 34mm | 25mm | 12,000 | 46 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |
| 12mm × 6mm | 34mm | 25mm | 12,000 | 46 | 0.4mm | 3° | 0.7mm | Forward/Reverse, Start/Stop | 00000000 | 000000 |