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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.
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.
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 |