Specifications
1.the wire dia for wire form spring range from 0.2mm to 20mm.2.ISO9001:2008 manufacturer.
3.welcome custom design
extension spring、metal spring、steel spring 、 drawba spring、widely used in automotive interior, industrial machinery, apparatus equipment, toys, automatic washing machines and various types of spring tension regulator, this spring general circular section steel, tin phosphorus copper production. , displayed 0.2 mm-20 mm range.
Extension springs are the direct opposite of compression springs, in that they are close-coiled helical springs that extend under a pulling force. When designing extension springs consideration must be given to stress due to initial tension, stress and deflection of hooks, special coiling methods, secondary operations, and allowance for over-stretching at assembly.