• Load case: Compression & Extension
    The HELI-CAL Machined Spring® provides very repeatable and linear, axial spring rates because of the absence of residual stresses often associated with traditional wire wound springs.  A significant advantage of the HELI-CAL Machined Spring is the ability to provide multiple-start Flexure (coil) configurations.  Using the multi-start configuration (normally Double or Triple Start) the unresolved moments common to single-start springs will prevent tipping or the application of side loads during compression or extension.  One additional benefit of the multi-start coil configuration is it provides a level of system redundancy because more than one coil is transmitting the load.  Another feature of the HELI-CAL Machined Spring is combining a right-hand and left-hand Flexure in a single piece to prevent rotation that many types of springs exhibit during compression and extension.  The ability to incorporate custom machined features as part of a single piece elastic component makes the HELI-CAL Machined Spring the perfect solution for today’s demanding applications.
  • Load case: Torsion
    Endless design options are possible with the HELI-CAL Machined Spring when applied to torsional load case. Because attachment features can be integrated into a single piece spring, the traditional challenges of how to transfer torque into a torsion spring will no longer be a concern. It is now easier than ever to use the versatility of integrated features to enable a Pure Moment in your torsion spring application. Gain smoother operation and added value by making a feature-rich HELI-CAL Machined Spring the solution to your design requirements. With linear rates and the potential for rate accuracies approaching 1%, outstanding performance will set your design above the rest.
  • Lateral Bending & Translation
    Additional benefits of the HELI-CAL Machined Spring can be realized in applications beyond the normal compression/extension or torsion load cases. The engineering staff at Helical Products can apply their expertise in Engineered Elasticity to spring designs involving Lateral Bending and/or Lateral Translation applications.  Lateral Bending is the result of anchoring at one end and applying a Moment to the opposite end. Lateral Translation occurs when one end of the spring is anchored and the other end has a Force and Moment applied to the other end so the ends remain parallel during displacement.
    Leveraging the HELI-CAL Machined Spring’s ability to provide both pre-determined elastic performance and integrate attachment features, all in a single-piece, enables significant design possibilities with the same reliable and repeatable performance that Helical Products is known for. The integrated attachments facilitate the anchoring of the spring and subsequent applying of Forces and/or Moments with unprecedented ease. Changing the outside or inside diameters, as well as number of starts, number of coils and coil width, make it is possible to provide desired spring rates in different axis of displacement.