High Cycle Garage Door Torsion Spring

High Cycle Garage Door Torsion Spring. Oil Tempered High Carbon Steel: Wound from premium high-carbon spring wire and oil-tempered for stable load retention throughout the service life. Supplied Wound and Coned: Each spring is delivered with matched winding cones and set screws already fitted, so installers mount directly without on-site coning. Left- and Right-Hand Wound as Matched Pairs: Every set is wound to the correct hand and packed as a pair, keeping the door level and the cable drum balanced under load.