2.Technology is very advanced.
3.Excellent technical team.
4.High quality products but competitive price.
5.Free samples, low MOQ, factory direct sale.
6.Prompt reply. In time delivery.
7.Can be customed.
Tension spring is a kind of spiral spring which is usually made of the circular cross-section to withstand axial tension. It is tight between the circle and circle of the spring with no clearance when it’s under no load. A number of different terminal devices or "hook" are used to ensure tension of extension springs.
The design of tension spring depends on spring material, material diameter, outside diameter, length, number of turns, the location and shape of earring, load and the corresponding value.
Spring wire diameter range from 0.1 to 8.0 mm.
Stainless steel extension spring; Precision extension spring; Galvanized extension spring; Double-hook extension spring; Movable hook extension spring; Large diameter extension spring; High quality extension spring; Nickel plated extension spring; Fitness extension spring; Metal extension spring; Carbon steel tensile spring; Heavy duty extension springs; Garage door extension springs; Expansion spring; High elastic tension spring; Big tension spring; Small tension spring; Custom tension spring; and so on.
They can be used in many occasions, such as production assembly, experiment, research, maintenance and so on. Tension spring occupies an important position in the global market, widely used in national defense, Marine, computer, electronic, automotive, mold, medical, biological, chemical, aerospace, railway, nuclear power, wind power, thermal power, engineering machinery, mining machinery, construction machinery, elevator, etc.
XD HI-TECH, established in 2007 is one of the excellent manufacturers in China. Come and find china designed stainless steel heavy duty garage door extension spring manufacturer from our factory. With high precision, and good performance, our custom products have a wide application field. Welcome to wholesale our quality products and the PDF display is also offered.