A Series

Flexible Aluminum Set Screw Couplings

The Helical A Series Flexible Aluminum Couplings meet performance demands across a wide range of applications, including drive systems for encoders, instrumentation, lead screws, small pumps, feed rollers, and other light to medium-duty uses requiring torsional flexibility. As Helical’s most popular coupling, the A Series offers an array of options and diameter sizes, allowing customization to fit specific applications. These couplings require no maintenance, accommodate shaft sizes from 3/32” to 3/4”, and are available in 7075-T6 Aluminum Alloy with a set screw attachment.

  • AR112-12-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-12-12

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 3/8 in
    Minor Bore: 3/8 in

  • AR112-12-8 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-12-8

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 3/8 in
    Minor Bore: 1/4 in

  • AR112-16-10 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-16-10

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 1/2 in
    Minor Bore: 5/16 in

  • AR112-16-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-16-12

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 1/2 in
    Minor Bore: 3/8 in

  • AR112-16-16 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-16-16

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 1/2 in
    Minor Bore: 1/2 in

  • AR112-16-8 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-16-8

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 1/2 in
    Minor Bore: 1/4 in

  • AR112-20-16 Helical A Series Flexible Aluminum Set Screw Couplings

    AR112-20-16

    Outside Diameter: 1 1/8 in
    Length: 1 1/8 in
    Major Bore: 5/8 in
    Minor Bore: 1/2 in

  • AR125-10MM-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-10MM-12

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 10 mm
    Minor Bore: 3/8 in

  • AR125-12-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-12-12

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 3/8 in
    Minor Bore: 3/8 in

  • AR125-12-8 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-12-8

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 3/8 in
    Minor Bore: 1/4 in

  • AR125-16-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-16-12

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 1/2 in
    Minor Bore: 3/8 in

  • AR125-16-16 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-16-16

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 1/2 in
    Minor Bore: 1/2 in

  • AR125-20-12 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-20-12

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 5/8 in
    Minor Bore: 3/8 in

  • AR125-20-20 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-20-20

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 5/8 in
    Minor Bore: 5/8 in

  • AR125-20-8 Helical A Series Flexible Aluminum Set Screw Couplings

    AR125-20-8

    Outside Diameter: 1 1/4 in
    Length: 1 1/4 in
    Major Bore: 5/8 in
    Minor Bore: 1/4 in

Scroll to Top