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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.
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Flexible Couplings

Helical A Series Aluminum Couplings
Flexible Couplings

Helical A Series Aluminum Couplings
Flexible Couplings

Helical A Series Aluminum Couplings
Flexible Couplings

Helical A Series Aluminum Couplings
Flexible Couplings

Helical A Series Aluminum Couplings
Product Type N/A Coupling
Series N/A ACR
Type N/A Integral Clamp Attachment
Material N/A 7075-T6 Aluminum Alloy
Finish N/A Clear Anodize
Outside Diameter Designator N/A 037 N/A 050 N/A 050 N/A 050 N/A 050
Outside Diameter (D) N/A N/A N/A 1/2 in N/A 1/2 in N/A 1/2 in
Length (L) N/A N/A N/A 0.75 in N/A 0.75 in N/A 0.75 in
Size (+0.002 in/-0.000 in) N/A N/A N/A 0.094 in2.39 mm N/A 0.125 in3.18 mm N/A 0.125 in3.18 mm
Bore Designator N/A N/A N/A 3 N/A 4 N/A 4
Momentary Dynamic Torque1 N/A 0.03 lb·in N/A 0.06 lb·in N/A 3.7 lb·in N/A 3.5 lb·in N/A 3.5 lb·in
Torsional Rate N/A N/A N/A 0.98 degree/lb·in N/A 1.3 degree/lb·in N/A 1.3 degree/lb·in
Inertia2 N/A N/A N/A 0.11 x 10-5 lb.in.sec2 N/A 0.11 x 10-5 lb.in.sec2 N/A 0.11 x 10-5 lb.in.sec2
Screw Size3 N/A N/A N/A 1 - 72 N/A 1 - 72 N/A 1 - 72
Seating Torque N/A N/A N/A 4.0 lb·in N/A 4.0 lb·in N/A 4.0 lb·in
Center Line N/A N/A N/A 0.09 in N/A 0.09 in N/A 0.09 in
Min. Size N/A N/A N/A 0.090 in2.29 mm N/A 0.090 in2.29 mm N/A 0.090 in2.29 mm
Max. Size N/A N/A N/A 0.125 in3.18 mm N/A 0.125 in3.18 mm N/A 0.125 in3.18 mm
Max. Bore Diameter N/A 2.00 mm N/A 2.51 mm N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm N/A 0.236 in6.00 mm
Bore Depth N/A N/A N/A 0.19 in4.83 mm N/A 0.19 in4.83 mm N/A 0.19 in4.83 mm
Shaft N/A 0.0787 in N/A 0.0987 in N/A N/A N/A
Max. Torque N/A 1.11 oz.in N/A 2.08 oz.in N/A N/A N/A
Additional Information N/A
N/A
N/A
Equal diameter shafts

Unequal Diameter Shaft
N/A
N/A
Customize N/A Custom Designs
  • 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