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Custom Roller Shutter Door Helical Spring , Strong Rolling Push Shutter Spring
garage door springs counterbalance the weight of the door to make it easy to open and close. They serve the same purpose of counter weights used to balance doors in centuries past and in many doors today.
the length of garge door springs,exactly speaking,the number of coils is one of the main factors to determine the spring rate of garage door torsion spring,or the torque of torsion spring in other words,so we add a process to adjust number of coils specially with cutting by punch and make sure each spring have the same coils with drawing.
when torsion springs are wound, they grow in length. Since both ends of the torsion springs on steel rolling doors are secured and cannot move, the spring cannot grow in length. There are two options for fixing this problem. You can stretch the spring yourself with a come-a-long before you secure it to the shaft, or your can purchase pre-stretched springs. This allows the coils to be gapped and to lose most of this gapping when the door closes.
• Torsion spring material: Carbon steel & Stainless steel&sSpring steel
• Torsion spring wire dia:0.1-8mm
• Torsion spring size: all size/AS you required
• Torsion spring surface Finish: zinc plated (trivalent chromium or sexivalent chromium), nickel plated,oxidation plated, plain finish , Black Oxide and so on
• Torsion spring plating: BlackOxided, Zinc,Chrome, Galvanized, Nickel,Dacromet, Delta-Tone, Geomet,Ruspert
• Torsion spring packing: as you required
• Torsion spring sample lead time: within 7—10 days
• We also could produce according to buyer's drawing or samples/Non standardcompression springs.
|Product Name||Manufacturer custom garage door pull roller shutter torsion spring lowes for industrial|
|Sample||Free to send you If have stock|
|Packing||Inner---PE Bag; Outer -- Carton Box.|
|Material||Spring steel,65Mn,60Si2Mn ,stainless steel 201,301,304,316,603 Brass,bronze,
SECC,SPCC,aluminum,aluminum alloy, stainless steel, nitinol,titaniumtim etc.
|Surface treatment||Galvanize,Zinc,Nickel,Chrome plating, electrophoresis,painting,CNC milling, laser engraving& laser welding, sand-blasting, polishing, hairline brushing, spraying, anodizing, diamond cutting & high bright, printing, electro-deposition etc.|
Automatic machine, Medical device, Industrial machine, Automoblie, Electric a appliance, Pulic equipment, etc
|Quality control||Acoording to ROHS and SGS,conducted by ISO9001:2008|
|Euipments||Laser Cutting Machine/CNC Shearing Machine/Flat Bed Spot-welder/Die Grinder/Steel Processing Machine/Double Servo Turret-type Punch Press/Banding Machine/Steel Processing Machine/etc.|
|Testing Lists||Coordinate measuring machine,, Technical projector, Salt spray tester, HTHH test, Abrasion tester etc.|