KOP DOOR was built on providing top quality garage door springs for our domestic and overseas brand garage door factories, so we can be your torsion and extension springs choice for every garage door repair and upgrade.
As for your 1st choice manufacturer, we deliver durability and reliability you can count on for every job. Select the high grade steel wire from qualified raw material supplier, with the same standard oil tempered wire like ASTM A229 Class 2, our springs can reach the higher 1.5times level of cycle lifetime than your currently using.
20+ quantity of steel wire diameter with over 500 tons( 1 million pounds) raw material inventory, 6 lines with over combined 120 years experiences and 1000 cubic meters finished goods warehouse, we can deliver you the most common size springs at your market within 10 days without any issues.
Garage Door Springs
Longer Cycle Lifetime and Slower Lose Tension
Above 2 points may be most important things or confusion for you to import the garage door springs from China. We select the reliable steel wire 82B and other oil tempered spring wires from reliable suppliers. After spring coiling process finished, our springs will be heated over 30 meters heating line in 20 minutes, that will make our garage door extension and torsion springs have more stable quality than others.
Different High Quality Surface Treatment to Avoid Spring Corrosion
Considering your local most common standard and economic factor, we can offer oil immersed, galvanized, electrophoretic coating and powder coating treatment for your extension and torsion garage door springs. Oil immersed springs are the lowest price with simple anti-dusting oil paint, the others treatment will make you get more beautiful, cleaner and more anti-corrosive garage door springs.
Strong Engineer and R&D Team Make You Get Best Springs
With our combined over 120 years experiences of spring manufacturing and design, for your customized or not standard size doors, our R&D team will offer suitable garage door springs to help your business or installation shortly. Meanwhile, our team will offer the professional suggestion for your garage door distribution or installation works, so that you can get the higher grade springs at your market.
We have different lifespans for different steel material and treatment, from 10,000 times up to as high as 30,000 times.
Yes, the steel material of our oil tempered springs have the same chemical components like U.S. standard spring steel wire.
We can do longest springs 9 meters by our large scale professional heating device.
Yes, we can guide you cut the long springs when you buy the 122’’, 144’’ or 3 meters, 5m length long springs (snake springs) from us.