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Contact USA Inside SalesCatherine Topar
Ph: 203-334-7537
Fx: 203-334-7792
Email: ctopar@e-jpc.com
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  • Light to medium duty
  • Non-magnetic
  • Economical
  • No maintenance
The A Series coupling meets performance demands over a wide range of applications, including drive systems for encoders, instrumentation, lead screws, small pumps, feed rollers and anywhere a light to medium duty, torsionally flexible coupling is required. Helical's most popular coupling.

  • No maintenance
  • Shaft sizes from 3/32 to 3/4
An array of options, in a variety of diameter sizes, allows you to tailor the A or H Series to your specific applications. A and H Series options include set screw or integral clamp attachments and inch or metric bores.
Unit of Measure

Product Type

 N/A Coupling

Series

 N/A AR

Type

 N/A Set Screw Attachment

Material

 N/A 7075-T6 Aluminum Alloy

Finish

 N/A Clear Anodize

Outside Diameter Designator

 N/A 087

Outside Diameter (D)

 N/A 7/8 in

Length (L)

 N/A 0.87 in

Size (+0.002 in/-0.000 in)

 N/A 0.250 in6.35 mm

Bore Designator

 N/A 8
Momentary Dynamic Torque1 N/A 17 lb·in

Torsional Rate

 N/A 0.28 degree/lb·in
Inertia2 N/A 1.2 x 10-5 lb.in.sec2
Screw Size3 N/A 6 - 32

Seating Torque

 N/A 8.0 lb·in

Center Line

 N/A 0.10 in

Min. Size

 N/A 0.138 in3.50 mm

Max. Size

 N/A 0.315 in8.00 mm

Max. Bore Diameter

 N/A 0.444 in11.27 mm

Bore Depth

 N/A 0.31 in7.87 mm

Note

 N/A
  1. Shaft misalignments:
    Angular 5 degrees
    Parallel Offset 0.030 in. (0.060 in. T.I.R)
    Axial Motion ±0.010 in.
  2. Manufacturing dimensional tolerances unless otherwise specified are:
    fraction ± 1/64
    x.xx ± .01 in.
  • 1 Dynamic torque ratings are momentary values. For non-reversing applications, divide by 2. Divide by 4 for reversing applications. Should the torque ratings be marginal for your application.
  • 2 Inertia is based on smallest standard bore diameter.
  • 3 Metric Fasteners available on request