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XL-302 Black High Tension Springs , Coil Tension Springs For Mini Blinds

Foshan Nanhai Xulong Spring Factory
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XL-302 Black High Tension Springs , Coil Tension Springs For Mini Blinds

Brand Name : Xulong spring
Model Number : XL-302
Certification : ISO 9001:2008 TS 16949,ROHS
Place of Origin : Guangdong,China
MOQ : 1pc
Price : negotiation
Payment Terms : T/T , Western Union,Paypal
Supply Ability : 100 000pcs per month
Delivery Time : Up to quantity
Packaging Details : carton 37cm*27cm*20cm
Product Name : extension spring
Material : Spring steel
Spring steel : 1.3mm
body length : 114mm
Application : machinery
Surface treatment : electrophoresis
Outside diameter : 15mm
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XL-302 Black High Tension Springs , Coil Tension Springs For Mini Blinds


MaterialSpring steel 82B
Wire diameter1.3mm
Outside diameter15mm
body length114mm
HardnessHRC 40-42
Surface treatmentelectrophoresis
Load typetension


Using CNC spring coiling machines, we can produce custom extension springs with wire diameters from 0.08mm to 35mm in the way of cold wounding and hot wounding.

Our extension springs are available with different end configurations to facilitate the attachment to components being acted upon. End configurations that we offer include full loop,machine hook,coned end with swivel hook or bolt,crossover hook and custom shaped hook.

Our tech dep can design springs to have initial tensions according to the load requirement of your applications. We will also validate spring designs before manufacturing, and secondary processes such as color-coding, plating, and heat-treating are must for extension springs to make sure high quality.


Applications for extension springs include automotive interiors and exteriors, garage door assemblies, appliances,furniture,engineer machines,washing devices, farm machinery as well as thousands of other uses. XULONG’s extension springs come in a wide array of sizes, from small medical devices to off-road machinery brake springs and marine container.

1.3mm electrophoresis black extension spring for machinery

extension spring for machinery made by xulong spring factory

 extension spring made with spring steel

 extension spring for machinery packed with paper case

xulong spring manufacture extension spring

XULONG SPRING’S Key features

1. wire diameter:0.08-60mm
2. Material:stainless steel(SUS 301/SUS304/SUS316),carbon steel,music wire,alloy steel,spring steel,cold drawn steel,phosphorous bronze,SWPA/SWPB etc
3. Spring pitch changeable
4. Finish:peen shooting,oiled,powder coating,zinc plating,nickel coating,chrome coated etc
5. Heat treatment:tempering,stress relieving
6. Certification:ISO 9001:2008 TS 16949
7. Spring Package:PE bags,cartons,pallets
8. Application:appliance,automotive,mould,machinery,elevator,office equipment,shock absorber,lamps and lanterns,toy,telecommunication,lawn/garden,high speed rail,textiles etc

Product Tags:

extension coil springs


helical extension spring

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