Extension Springs

Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
Extension Springs
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Extension springs are primarily used in medical ventilator, hand tools and home care equipment for storing energy and exerting a pulling effect. The extension spring must be attached to a device or component, and its end may be a loop or a hook.

KLF provides customized extension springs in the following range:
Shape and size End type Material
Wire diameter: 0.1-6.0mm
* Round Wire
* Square Wire
* Rectangular Wire
* Special Section Wire
* V-hook over center
* Full loop at side
* Half loop over center
* Small eye at side
* Double full loop at side and Special customized
* Carbon steel wire
* High carbon steel wire
* Stainless steel wire
* Nickel plating stainless steel wire etc
Extension Springs Examples
  • 65Mn Steel Extension Spring for Hand Grip
    Wire diameter: 1.2mm
    Material: 65Mn steel wire
    Recommended application: Hand Grip Exerciser

  • 65Mn Steel Extension Spring for Book Stapler
    Wire diameter: 0.6mm
    Material: 65Mn steel wire (color zinc-plated)
    Recommended application: book stapler

  • 65Mn Steel Extension Spring for Manual Jigs
    Wire diameter: 0.9mm
    Material: 65Mn steel wire
    Recommended application: Manual jigs

Manufacturing Range

KLF designs and manufactures mechanical spring according to your requirements as below, using a camless spring machine, milling machine, grinding machine and other production equipment.

  • Length: Overall length (O/A), Pull length (P/P) or Body length (B/L)
  • Diameter: Outer diameter (O/D), Inner diameter (I/D), Middle diameter (M/D)
  • Wind direction: left-hand or right -hand
  • Ends type
  • Material and surface treatment
  • Tolerances and working conditions
Design drawing
  • Gap
  • wire diameter
  • length
  • extension length
  • outer diameter
  • inner diameter

Extension Springs Shape
  • half loop over center
  • full loop at side
  • long round end hook over center
  • small eye at side
Extension Springs End Types
  • Machine half hook
  • Half loop
  • Coned end with swivel
  • Square hook
  • V hook
  • machine cut plain ends
  • single full loop over center
  • small offset hook at side
  • machine half hook over center
  • double full loop at side
  • half loop over center
  • full loop at side
  • long round end hook over center
  • small eye at side
  • threaded plug to fit plain end spring
  • V-hook over center
  • extend end eye over center
  • drawbar spring
  • coned end with swivel bolt
  • coned end with swivel hook
Customization

All of extension springs produced by KLF are customized according to the samples, drawings or size provided by customers directly.

  • Material: High carbon steel wire, 301 /302 /304/ 316 stainless steel, carbon steel, nickel plating stainless steel wire or customer specified.
  • Surface treatment: Nickel plating, tin plating, white zinc plating, silver plating, blue zinc plating, color zinc plating, etc.
  • Corrosion control method: metal coating, chemical coating, non-metallic coating, and temporary coating.
  • Wire diameter: 0.1-6.0mm.
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