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Oiled Tempered

  • Factory Price Rolling Shutter Door Torsion Spring

    Factory Price Rolling Shutter Door Torsion Spring

    Made of heat-treated professional spring steel coils with aluminum cones to make sure they are extremely heavy duty.

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  • 120′ Oiled Tempered Industrial Roller Shutter Door Torsion Spring

    120′ Oiled Tempered Industrial Roller Shutter Door Torsion Spring

    Tianjin Wangxia Roller Shutter Door Torsion Springs are manufactured from high-tensile,oil-tempered spring wire, meeting ASTM A229.All our Springs are factory lubricated to minimize friction and corrosion while increasing the spring cycle life.

    Roller shutter door springs counterbalance the weight of the door to make it easy to open and close.They serve the same purpose of counterweights used to balance doors in centuries. Thus, the durable wire spring and assembly technology are essential considering the reliability and safety over a very long period of time.

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