Spring grinding is one of several available spring finishing methods, all of which are done using spring grinders. Spring finishing describes a series of different processes that can be performed on a given spring to change its original design and help it become more useful in a given application.
An example of a spring finishing process is spring coating. For example, the spring is coated with zinc or some other mineral to help resist corrosion. There is also strength shot peening, which is a spring finishing process that can help the spring resist cracking and metal fatigue. Grinding is just one of these processes, one is designed to form a flat end on a compression spring so that the spring can be more easily attached to other surfaces. Compression springs may have several different end types, including open ends, open and polished ends, closed and non-polished ends, and even square and polished closed ends.
Compression springs may have several different end types, and the flat end is just one of them. They may also have open ends, open and polished ends, closed and unpolished ends, and even square and polished closed ends. The ends of flat compression springs are naturally completely flat and have parallel ends. The ends of the springs are thoroughly inspected and tested to ensure that they meet the load threshold requirements of the spring and the appropriate size.