CNC machining is a key step in the process of metal casting. In CNC machining, a computer-controlled machine tool cuts metal (usually stainless steel or aluminum) into complex shapes and prototypes or final products, or threading of tension inserts
CNC machining is often used for making threading inserts for tensioners and springs. The goal is to create a thread that can be inserted into the existing hole in the tensioner or spring, so that it can be tightened down. This can be done with a variety of different materials, including brass, bronze and stainless steel.
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