Screw Die

What are types of thread cutting dies?

Hand threading dies are generally of two types. ROUND dies are designed to fit in a T-handle while HEX DIE NUTS can be used with regular hand tools. (Wrenches and sockets.) Round dies are usually the choice for cutting new threads whereas hex die nuts are commonly used as a chaser to repair existing threads

What is the purpose of adding lubricant when cutting threads?

Applying the proper lubricants in tapping operations can result in longer tap life, increased production, better workpiece size control, smoother and more accurate threads, less resharpening, and more efficient chip removal. Generally, for best tap performance, straight cutting oil should be used.