A compression spring is an open-coil helical spring that offers resistance to a compressive force applied axially.
They are usually coiled at a constant diameter, though they can be coiled in other needed forms such as conical, concave (barrel), convex (hourglass), or various combinations of these.
Compression springs are used to resist force and/or store energy,
1、Characteristics
By far the most widely used type of spring, compression springs are designed to oppose compression and return to its uncompressed length when the applied force is removed.
2、Service Life
It should be noted that if critical force-versus-deflection linearity is required, only the center 60-80% of the available deflection range should be employed.
Thus, reserve at least the first and last 15-20% of the range for potential spring-end and adjacent coil-contact effects.
3、Materials
The term “spring steel” is a stock inventory term covering music wire, hard-drawn(MB) wire and oil-tempered wire.
Additionally, stock compression spring materials may include stainless steel (300 series), beryllium copper, and phosphor bronze.
4、Tolerances
Calculated rates and loads based on SMI geometric tolerances have an approximate +/- 10%. Low or high-index springs will have higher values.
5、Requirements
Closed ends and ground ends
6、Surface Treatment
Zinc Plated,Nickel Plated,Gold Plated,Chrome Plated,Cooper Plated,Brass Plated and so on.