Compression

Compression Spring is open-coil helical spring constructed to oppose compression along the axis. Compression Springs are the most common springs used. Generally, they are either wound over a rod or fitted inside a hole. When load is applied on this spring, it is compressed, it pushes back against the load and tries to get back to its original position. Compression springs offer resistance to linear compressing forces (push), and are also known as one of the most efficient energy storage devices.

Configurations: Most common compression springs are straight springs which has the same diameter for the entire length. The straight coil configuration is the standard coil type for Stock Compression Springs. Other configuration options for compression springs include concave, conical and convex types.

Our springs are available in two types closed end and gound ends. Ground ends provide flat planes and stability. Squareness influences how the axis force produced by the spring can be transferred to adjacent parts. Although open ends may be suitable in some applications, closed ends afford a greater degree of squareness. ground end compression springs are particularly used where

* high-duty springs are specified

* unusually close tolerances on load or rate are needed

* solid height must be minimized,

* accurate seating and uniform bearing pressures are required and

* a tendency towards buckling must be reduced.

Key Parameters:

Dimensions: Outer Diameter, Inner Diameter, Wire Diameter, Free Length, and Solid Height.

Free Length is the overall length of a spring in the unloaded position.

Solid Height is the length of a compression spring under sufficient load to bring all coils into contact with adjacent coils.

Spring Rate is the change in load per unit deflection in pounds per inch (lb. /in.) or Newtons per millimeter (N/mm).

Unit of Measures

Stress: The dimensions, along with the load and deflection requirements, determine the stresses in the spring. When a compression spring is loaded, the coiled wire is stressed in torsion. The stress is greatest at the surface of the wire; as the spring is deflected, the load varies, causing a range of operating stress. Stress and stress range govern the life of the spring. The higher the stress range, the lower the maximum stress must be to obtain comparable life. Relatively high stresses may be used when the stress range is low or if the spring is subjected to static loads only. The stress at solid height must be high enough to permit presetting, yet low enough to avoid permanent damage since springs are often compressed solid during installation.