Metric & Imperial Dies
A die cuts an external thread on cylindrical material, such as a rod, which creates a male threaded piece that functions like a bolt. Dies are generally made in two styles: solid and adjustable. An adjustable die may be adjusted either by an integrated screw or by a set of screws set into the die holder (termed a "die stock"). Integral adjusting screws may be arranged to work axially, where the movement of the adjusting screw into a threaded hole in the die forces the slit section of the die open, or tangentially where a screw-threaded into one side of the slit bears against the opposite side of the slit. Dies without integrated screws are adjusted inside the die stock by radially-arranged screws.
Die come in many different types the main types are Solid and Split,
- Solid or Die Nut cut a nominal thread form and depth, whose accuracy is subject to the precision the die was made with, and the effects of wear.
- Adjustable or Split dies can be slightly compressed or expanded to provide some compensation for wear or to achieve different classes of thread fit.