Extension Springs

Custom Extension Springs

Our Extension Spring capabilities are nearly limitless: long springs, small springs, large loops on small bodies, custom hooks, custom hook alignments, etc. We can run most springs in one operation, saving you money, and for those more complex designs we have a tooling department that can press about anything. Our wire size capabilities range from 0.008" to 0.196" [0.20mm to 5.00mm].

Precision Quality Extension Springs

Our Quality starts with our engineers, who evaluate every custom spring design to ensure functionality and cost effectiveness.  Before production, every new design is independently inspected twice after setup to make sure the extension spring is produced to your design. During production, we take periodic measurements and make any necessary adjustments. After production, we take more sample measurements by another inspector, just to make sure. If you require high precision load tolerances, 100% load testing is available upon request.

Our quality standard, IATF 16949:2016, allows you to expect precision automotive quality from prototype to PPAP to production, no matter what industry or application.

Extension Spring Manufacturer

As experts in extension spring design and manufacture, Lewis Spring & Manufacturing produces quality, custom extension springs in various body types, custom hook or loop shapes, and materials. Lewis Spring & Manufacturing has accumulated over 70 years worth of machinery, expertise, and business relations to make the exact extension springs you need. We keep a large selection of wire sizes and material types in stock, and what we don't have in stock, we have access to from various suppliers. 


To learn more about extension springs and how Lewis Spring & Manufacturing can assist you, we invite you to request a quote or contact us today.


Wire Size
0.004” - 0.196” (0.1mm – 5.0mm)
Wire Material
  • Ferrous (i.e. Music Wire, Stainless Steels, HDMB, Inconels, Chrome Vanadium, etc)
  • Non-ferrous (i.e. Aluminum, Phosphor Bronze, Beryllium Copper, etc)
Cross Section
  • Round
  • Square
  • Rectangular
  • Special
Body Types
  • Straight
  • Conical
  • Barreled
  • Hour Glass
  • Custom
  • Hooks/Loops
  • Side
  • Crossover
  • Machine
  • Enlarged
  • Reduced
  • Extended
  • Double Looped
  • Custom