Die holders attach to a lathe’s tailstock and hold dies for cutting materials. Tailstock and hex nut holders use screws to secure the die, while acorn holders use a clutch mechanism for easy release.
Die holders are tubular parts that attach to the tailstock of a lathe. With the die installed, the holder can remain stationary while the material to be cut on the mandrel is advanced into the die, or the material to be cut can remain stationary and the die holder is rotated in the tailstock. Using a die, the fillets can be worked into a stick-shaped material.
A tailstock die holder is a tube that fits over a tapered part that connects it to the tailstock of a lathe. The tailstock is usually held stationary while a rod attached to the rotating mandrel is forced through it to be threaded. Die holders usually have three screws near the side facing the tailstock spindle to locate the die, a cylindrical disk containing the cutting tool. Holes cut symmetrically to the central threading tool are for metal or other material chips. The metal chips escaping from the workpiece are first thrown into these holes and then out of the pocket of the die holder.
A hex nut is one that is shaped like a hexagon, with flat sides of equal length. This type of die can be seated in ordinary circular die holders by means of the adjustable die holder screws as long as its radial dimensions are not greater than the internal diameter of the circular die holder. A simple clamping stand for the hex nut takes advantage of the flat sides of the hex nut, stabilizing it above and below. In this mode, it cannot be expected to rotate and can only perform its function when material driven by the chuck is forced in.
Acorn die holders have a built-in clutch mechanism which allows the holder to be released without shock. As the cap of an acorn holds the seed of an oak tree, so the acorn die holder uses a similar technique to hold the circular nut. Instead of using screws to secure the round or hex nut, acorn die holders surround the round die at its sides, locking into the thickness of the die to form a tight fit with the rest of the holder, a tapered region, and the tailstock. With the ability to rotate, the advantage with this type of die holder is easy positioning and release.
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