Extension Springs
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 |
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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
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
- ①Gap
- ②wire diameter
- ③length
- ④extension length
- ⑤outer diameter
- ⑥inner diameter
Extension Springs Shape
- half loop over center
- full loop at side
- long round end hook over center
- small eye at side
- 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
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.
