Industrial Door Torsion Spring

Industrial Door Torsion Spring

Rolling door torsion spring

Product Details

 Helical coil industrial door torsion spring

We are specialized in the production of various springs, such as compression spring, tension spring, torsion spring, button spring, battery spring, automobile antenna spring, leaf spring and other special-shaped springs. The springs can be customized as customers’request from Min diameter 0.08 mm to Max diameter 8.0 mm and a variety of spring materials also can be chosen.  

Typetorsion spring
 Wire Dia0.08~8mm
MaterialCarbon steel(SWC), cold roller steel, stainless steel(SUS), beryllium copper, phosphor copper, brass, music wire or piano wire(SWP), 60Si2Mn, 55CrSi etc.
 MPN1000,000pcs/Even higher
    Endurance Limit 5,000,000 Times
   EngineeringProduct Analysis,Design,Test,Validation ect
    Usage of springElectronic products, Children toys, Locks, Watches, Glasses, Baby carriage, Bicycle, Kitchen appliances, cameras, printers, office equipment, precision equipment and various kinds of vehicles
  Processing Craft Material purchased-production-heat treatment-surface treatment-quality detection-package-shipping
  Heat TreatmentTempering, Stress Relieving, Spheroidizing
  StandardISO9001-2008, SGS Certificate,ROHS Report
  Test EquipmentsProjector , digital hardness tester,digital torsionstrength tension and compression strength tester . elasticity tester. life tester , salt spray test machine etc.
  Quality Control

1.PPAP,SPC,FMEA,MSA quality management.
2.Tolerance control : DIN, JIS Standard.
3.Manufacturing processes inspection per hour and per batch.
4.Traceable management thoughout all process from raw material to customers.

We produce round and hex bars for residential and commercial garage door springs.

Available in 18″, 24″ and 30″

18″ & 24″ available in round or hex shape.


1/2″ At one end 7/16″ at the other end.

18″ HEX

1/2″ At one end 7/16″ at the other end.


1/2″ At one end 5/8″ at the other end.

24″ HEX

1/2″ At one end 5/8″ at the other end.


1/2″ At one end 5/8″ at the other end.


Machine milled ends, hardened steel.

These are professional grade winding bars.

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