spring

We welcome OEMs according to the design of customer.
Extension springs are close-coiled helical springs designed toresist an axial pulling force. Extension Springs or tension springs stretch from free length to a longer extended length to store energy, and offer resistance or provide a restoring force to a pulling force between two points.
Most extension springs are manufactured from round wire and are close wound with initial tension which offers a small deflection load for secure installation. You can design an extension spring with open wound coils when zero initial tension is required or when the spring needs to perform as an extension and a compression spring for the same application. Optimum Spring Solutions manufactures custom extension springs in different lengths and degrees of tension to suit your specifications.

Configuration
Common extension spring ends we manufacture are:
Hook: crossover center, extended, full round, machine

Physical Parameters
d (Wire Diameter): Wire diameter for the spring material.
De (External/Outside Diameter): Calculated by adding the internal diameter plus two times the wire diameter of a spring.
H (Hole): Minimum diameter of the hole in which a spring works.
L0 (Free Length): Overall length is specified between the inside of the spring loops.
Number of Coils: This is a total number of coils in a spring; in this case it is equal to six.
Loops: side, single full, double full
Wire Diameter
We manufacture extension springs with a wire diameter of 0.004