coupling catalog
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Innovative solutions for controlling mechanical movement U MANAGING MOTION G HELI-CAL ® N FL ZI I L EX TI U SINCE 1958 R E TE CH N O L OG Y Helical Products Company, Inc.

HELICAL The HELI-CAL ® Flexure Now You Can Dream . . . The inspiration for the HELI-CAL Flexure, the cylindrical helix ingredient for our basic Helical product lines, came from the observation that one piece, “flexured” flexible couplings offered maximum versatility in terms of form, function and reliability. Over time, the adaptability of the HELI-CAL Flexure has helped to solve thousands of mechanical misalignment and motion control problems. The unique, mechanical characteristics of the “Flexure” have enabled Helical Products Company, Inc. to develop a series of highly versatile,...

HELICAL The HELI-CAL Flexure Coil Width Inside Diameter By varying the thickness of the coils, a Flexure can accommodate increasing amounts of torque and radial loads. The designer may specify torsional stiffness and compression spring rates independent of other factors. When the inside diameter changes, so does the torque capacity, torsional stiffness and axial spring rates, without restricting your choice of bore sizes. Connecting Dreams with Design Solutions: The HELI-CAL Flexure Problem Solver Number of coils Freedom of design... for maximum versatility Number of coil starts The Helical...

Number of Coils Number of Coil Starts When the number of coils is changed the torque capability remains unaffected. All of the other characteristics change. Multiple, (typically two) helical beams provide high torsional stiffness. Shown: single, double and triple start. Attachments Bore variety In addition to being able to alter the characteristics of the HELI-CAL Flexure, you may have your attachment method integrated into the final product. Helical Flexures may be engineered to include a variety of bore configurations. These variations include round, threaded, single or double-D, spline,...

HELICAL The HELI-CAL Flexure Angular Design Benefits of the Flexure More than a coupling The HELI-CAL Flexure concept brings enormous design flexibility to your applications. Depending on your needs, the Flexure can serve as a flexible shaft coupling, universal joint, spring clutch, machined spring or your own unique specialized component. Adaptability The Flexure’s ability to accommodate various performance characteristics and Helical’s ability to integrate attachments directly enhances your freedom to design. One-piece integrity Not only does the Flexure integrate multiple functions and...

Parallel Parallel misalignment is the most difficult form of misalignment for couplings to compensate for. It can also be the most damaging to shafts, bearings and motors. The HELI-CAL Flexure, through lateral displacement, transforms an application’s parallel misalignment problems into angular displacement within the coupling. The center coils of the HELI-CAL Flexure can become an intermediate shaft that can allow 10, 20 or 30 thousandths of an inch of parallel offset or more. Smooth bearing loads Bearing loads are primarily generated by a coupling’s natural resistance to bending, and can...

HELICAL The HELI-CAL Flexure This sampling of “standard” HELI-CAL Flexure couplings and specialized u-joints illustrates the variety of materials, coil configurations, bore diameters and attachment methods available to you. No matter what its size or shape, the HELI-CAL Flexure design assures performance, reliability, quality and versatility, arguably unmatched in the coupling industry. Adaptable Operating Speeds The ability to adapt to high— and low—speed applications is another inherent benefit of the HELI-CAL Flexure’s design. The Flexure transmits motion throughout its length and cross...

HELI-CAL Flexure, Flexible Couplings HELICAL HELI-CAL Flexure, Basic Product Summary W W DS MC A H Series Series Series Series Series Series stainless steel 17-4PH aluminum 7075-T6 stainless steel 17-4PH aluminum 7075-T6 stainless steel 17-4PH Stainless steel version of “MCA(C)” series, with higher torque capacity and torsional stiffness. Increased fatigue resistance. General purpose, light to medium duty. An economical, maintenance free coupling, used in a variety of applications. Stainless steel version of “A” series, with higher torque capacity and torsional stiffness. Increased fatigue...

W SERIES, Aluminum and Stainless Steel HELICAL Features • Metric dimensions and fasteners • Metric and/or inch bores available • Available in 7075-T6 aluminum alloy or 17-4 PH corrosionresistant steel • General purpose If you are working in the metric world, the W Series is for you. It combines the best features of the A Series and the H Series, with the convenience of metric dimensions and fasteners for your metric based designs. The W Series can be used in a wide range of applications from driving components with light torque requirements, such as encoders and tachometers (aluminum), to...

HELICAL W SERIES, Aluminum, Technical Data Attachment Screw HELICAL W SERIES, Stainless Steel. Technical Data Attachment Screw 2. Dynamic torque ratings are non-reversing applications, reversing applications. Should the torque ratings aluminum alloy Finish: clear anodize strength stainless steel. Finish: natural tolerances unless otherwise 5. Please refer to page 19 for other available bore 6. Inertia is based on smallest standard bore diameter.

DS SERIES, Aluminum HELICAL Features • • • • High torsional stiffness Low radial loads Parallel misalignment capability Low inertia The DS Series was designed for today’s high performance motion control systems. This Series incorporates two helical beams (double start) in each of two separate HELI-CAL Flexures (double flexure), combining greater end-to-end rotational accuracy with radial flexibility in one design. DS SERIES Attachment Methods Internal Configuration Integral Clamp / DSAC Available only with integral clamp attachments, the DS Series provides the high torsional stiffness and...