Heli-Cal Shaft couplings are an essential part of any rotary device where you need to connect a driven part without loss of registration.

Abssac supplies a single piece construction, zero backlash, constant velocity shaft coupling that simultaneously compensates for angular, parallel and skewed shaft misalignments. Available in Stainless Steel (or Aluminium) as standard with both metric and imperial bores sizes stocked ready to be delivered.

The Helical beam coupling range can also offer ways of integrating the design engineers own end attachment into the standard shaft coupling, but maintaining its one piece construction. We have had considerable success in supplying a ready to fit single construction part that can sometimes be comprised of three or more individual parts in the original design. This way our customers have saved money, time and hassle.... which is what we all want

Abssac is so confident that the award winning shaft coupling product can have an operational advantage over other styles of shaft coupling, that it is offering a free coupling to test, to prove the point.

Key product advantages

  • One piece construction
  • Standard bores from 2mm to 44mm (0.090 inch to1.750 inch)
  • Compensates for angular, parallel, skewed and axial shaft offsets
  • Metric and imperial model versions
  • Integral clamp and set screw attachment styles
  • Zero backlash torque transmission
  • Bore combinations metric and imperial and custom
  • Limitless shaft attachment designs - See specialist couplings
  • Constant velocity and zero vibration when offset
  • High fatigue resistance-low radial loads
  • Low bearing loads
  • Bi-directional torque transmission
  • Stainless steel and aluminium versions
  • Internal bore relief as standard
  • Fit and forget
  • Short delivery
  • Non magnetic versions
  • Vacuum environment compatible products

If you require further technical information, please do not hesitate to contact our sales engineers on 01386 421005 who will be more than happy to help you with your selection.

Part Numbers
A SeriesH SeriesDS SeriesMCA SeriesMC7 SeriesW SeriesW Series
Aluminum 7075-T6Stainless Steel 17-4PHAluminum 7075-T6Aluminum 7075-T6Stainless Steel 17-4PHAluminum 7075-T6Stainless Steel 17-4PH
aluminum 7075-T6stainless steel 17-4PHaluminum 7075-T6aluminum 7075-T6stainless steel 17-4PHaluminum 7075-T6stainless steel 17-4PH
Description
General purpose, light to medium duty. An economical, maintenance free coupling, used in a variety of appli- cations. Helical's most popular coupling/couplerStainless steel version of “A” series, with higher torque capacity and torsional stiffness. Increased fatigue resistance.Low inertia, high performance, aluminum coupling, using Helical double start technology. Torsionally stiffer and higher torque capacity than the “A“ series. Lighter with lower inertia than the “H” series.A general purpose aluminum coupling, used where more parallel misalign- ment is required. Has a large range of shaft sizes, with optional keyways.Stainless steel version of “MCA(C)” series, with higher torque capacity and torsional stiffness. Increased fatigue resistance.Metric dimensions  with metric fasteners.  A light to medium duty coupling for those preferring to work strictly in the metric system.  A general purpose coupling.Stainless steel version of the “WA(C)“ series, with higher torque capacity and torsional stiffness. Increased fatigue resistance with all metric dimensions and fasteners.
Typical Applications
Used for encoder/ resolver applications, low torque pump, lead screw and various other applications.For situations requiring a heavy duty coupling such as pumps, lead screws, and positioning systems; also for process equipment in industrial situations. Anywhere a rugged, tough, long-lasting coupling is needed.For high speed motion control systems, where fast response time is important. E.g., lead and ball screws, encoders/ resolvers, and anywhere high torsional stiffness is required.Good for encoder/resolver applications, moderate torque pump, lead screw, and various other applications.Good for pump, conveyor systems, and industrial processing equipment, where absolute reliability is required. Anywhere a rugged, tough, long-lasting coupling is needed.Used for encoder/resolver applications, low torque pump, lead screw and various other applications.For situations requiring a heavy duty coupling, for pump, lead screws, and positioning systems. Also for process equipment in industrial situations. Anywhere a rugged, tough, long-lasting coupling is needed.
Misalignment Compensation
5° angular,   .010 inch parallel offset, .010 inch axial motion5° angular, . 010 inch parallel  offset, .010 inch axial motion3° angular,  .010 inch parallel offset, .008 inch axial motion5° angular,  .030 inch parallel offset, .010 inch axial motion5° angular,  .030 inch parallel  offset, .010 inch axial motion5° angular,   .25mm parallel offset, 25mm  axial motion5° angular,  .25mm parallel   offset, .25mm axial motion
Torque Range
1.2-51 lbin2.4-100 lbin12-234 lbin20-286 lbin40-556 lbin.59-20 Nm1.2-39 Nm
Standard Bores (inch and or metric bores available in all couplings)
0.059-0.750 inch 1.5-19.05mm0.059-0.750 inch 1.5-19.05mm0.188-0.750 inch 4.78-19.05mm0.250-.875 inch 6.35-22.23mm0.250-1.000 inch 6.35-25.40mm3mm-38.1mm3mm-38.1mm
Attachment
Clamp or set screwClamp or set screwClampClamp or set screw Keyways optionalClamp or set screw Keyways optionalClamp or set screwClamp or set screw
Operating temperatures
Up to 200°FUp to 600°FUp to 200°FUp to 200°FUp to 600°FUp to 100°FUp to 300°F
Speed (in the wind up direction)
10,000 rpm10,000 rpm10,000 rpm3,600 rpm3,600 rpm10,000 rpm10,000 rpm

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