Spring Technology for the 21st Century

Introducing HELI-CAL® Flexure Technology

The HELI-CAL® Flexure is a flexible helix (curved beam) machined into a unique configuration that incorporates special design requirements, performance features, and/or characteristics. The material used is basically unlimited.
When used as a spring, the multifunctional flexure provides desired and predictable elastic performance in compression, extension, torsion, lateral bending, and lateral translation modes.

One huge advantage of this technology—it enables customer-specified end-attachments, such as tangs, clamps, flanges, or threaded ends, to be integrated into a single multi-functional component.

Request a quote to order machined springs made with HELI-CAL® Flexure Technology.

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MW Components - Precision machined springs

Features and Benefits of Machined Springs

  • Finite element stress analysis (FEA) with Ansys
  • Modal analysis
  • Accommodates a wide variety of integrated attachments
  • Includes pure spring reactions for torsional applications
  • Incorporates multiple start configurations to eliminate extraneous reaction forces and moments, (buckling)
  • Provides unlimited variations
  • Offers multi-functionality expertise


  • High strength corrosion-resistant materials such as stainless steel
  • High strength aluminum
  • High strength titanium
  • All machinable alloys
  • Machinable plastics

Materials most used: Stainless steel 17-4PH, 15-5PH, 303, 316, 416, 18-8, Custom 455 maraging,C300 and C250, 718, 4340, H-11, Beta C Titanium, Delrin 150, Aluminum 7075-T6.

Capabilities / Services:

  • Over 40 years of manufacturing and engineering excellence
  • Complete in-house engineering design and manufacturing
  • Quality assurance
  • Precise spring rates
  • Prototypes and short runs to high volume production quantities
  • Fast turn around and delivery
  • Unmatched dedication to quality and customer satisfaction
  • “Multi-start” flexure construction (more than one spring coil set) provides a broad range of spring rates and functionality within a given envelope. Provides a redundant coil to resolve lateral forces.
  • Precision machining of complex, multi-featured configurations

Integrated Attachments for Machined Springs

Threaded ID and ODIntegrated FlangeDouble Start FlexureHeat Dissipating Spring
Hubble telescopeAerospace applicationCryogenic cooler applicationUsed with lasers
Material: Beta C TitaniumRight and Left-Handed FlexureThreaded EndsCapacitor Terminal
240° torsional springTriple start, torsional springMars RoverAircraft electronics
Four Functions In OneTapered FlangeBeefed Up Radius on TangsFour Elastic Rates Incorporated
Now one piece with Helical wrap spring clutchSingle start, compression springOne-piece, wrap spring clutchMedical application, five start spring
Constant Pivot and RotaryMaterial: 17-4PHIntegrated End Attachments0.125″ Flexure OD
Medical application
Torsion spring
Industrial knife applicationMachine tool applicationCommercial lateral spring

Coil Geometries

Differences in coil geometry enable machined springs to provide more precise performance, features, and functions than can other, more traditional types of springs. There are big differences in performance, reliability, versatility, integrity, and cost-effectiveness. See the example below.

Wire-wound spring
Three pieces
Machined spring
Single piece
Integrated parts-functions

The bottom line:

  • Machined springs offer more functions in a single spring than other more traditional springs, such as wire-wound.
  • They add value, in terms of multipart integration, time saved in handling, reliability, rates being linear, and dimensions being very precise.
  • Machined springs reduce and/or control costs.
  • And they raise overall productivity, i.e., add more, do more, save more dollars.

Machined Springs vs. Wire-Wound, Which is Right for Your Application?

Consideration Wire-Wound Springs Machined Springs Notes
Perform basic elastic modes Yes Yes Machined springs have distinct multi-functional advantages.
Relatively inexpensive Can be Depends Both types can be expensive or inexpensive.
Available in different materials Limited Yes Machined springs can be produced from anymachinable material.
Multi-function – feature capability Limited Yes Machined springs can contain many dimensional features.
No stress to overcome before deflection No Yes Machined springs have a more precise force deflection relation.
Can reduce assembly costs Unlikely Yes Incorporating multiple features into a single partdesign makes assembly easier & cost effective.
Can contain redundant elastic elements (multiple starts) No Yes Machined spring rates are linear.
Quality – reliability Depends on manufacturer Yes Dimensional variances are typically smaller inmachined springs.
Precision elasticity Difficult Yes Variation rates in machined springs are typicallylow.
Integration with other products Difficult Yes Design it into your system, not around it.
Reduction of system complexity Difficult Yes Simplify your system by incorporating multiplecapabilities into a single part.
Custom-end configurations added to spring Difficult Yes One of the major advantages of machined springs.
Longevity achievable? Yes Yes Machined spring’s long life can benefit from multi-start configurations (double and triple starts).
Possible Configuration Wire-Wound Machined Spring
Extension spring Yes Yes
Compression spring Yes Yes
Torsion spring Yes Yes
Lateral bending spring ? Yes
Lateral translation spring ? Yes

Ask an Expert

Have questions about machined spring products, including materials, configurations, or attachments? Ask an MW Expert.