When you’re working with threads, a die stock is a vital piece of equipment. A die can be held in place with a die stock during external threading, but first you’ll need to know what kind of stock to use. In this post, we’ll go through the different kinds to use and importantly, how do you use an adjustable die stock?


What is a Die stock?

Shafts, rods, and pipes can all be threaded using dies, made of high carbon steel or high speed steel or cast iron, which is hardened and tempered. A die stock is the component that holds these die securely in place for use.

Fluted surfaces are used to create the die's cutting edge, and they feature standard V-shaped threads. Cutting is done with either a square or round die.

Die stocks, also known as die cast stocks, are essential to the creation of uniform threads on a variety of screws, bolts, and pipes. In essence, it is a frame that aligns the cutting tools, ensuring the threads are evenly spaced and that they meet the standard specifications. Round head and hex head dies are the most common types of cutting tools used in die stocks.


How they work:

The process of creating a thread for a male rod ends requires a die, which is shaped like a cylindrical cross section and hollow in the center. When the die is turned around the top of a rod, the spiraled edge of the center cuts the thread. These threads can then be used in a variety of construction processes.

Types of Die

There are several varieties of die, each with different circumferences and features. This affects the type of die stock that should be used in conjunction with them.

Types of die include solid dies, split dies, adjustable dies, plate dies, pipe dies, chaser dies, and acron dies.


Split Dies

Split dies are commonly used to form a new male thread onto a piece of bar, like that found on bolts.

Split dies fit usually in adjustable die holders with a securing screw to lock the die in place. The screw is fully screwed into the die during the initial cut, aligning itself with the split in the die. Since the die doesn't cut the whole screw thread the first time around, the initial cut is easier because the die doesn't open up as far as it can.

The thread is then cut deeper by releasing the screw slightly after the first cut.

You can also use a circular split die. The central screw of a circular split die is driven into the adjustment split to open the die wide enough to cut an external thread on a bar such as when forming a bolt. To start a thread, the split die is turned until its widest position is reached.


Adjustable Die

Adjustable die, much as they sound, allow more adjustment than the split dye.

The adjustable die is used for cutting external right-handed threads. The cut-to-size option is provided by having a slot in the centre of the circumference, and an adjustment screw that allows them to be adjusted to fit the same size.

Die sets of this type are always found in pairs.

They are usually used for threading small diameter rods because adjustable dies have a screw and an opening on one side that can be adjusted to hold the rod.

Precautions when using die stock

When selecting the right die, make sure the rod whose thread will be cut is the right size, and that its edge is chamfered slightly to facilitate starting the thread cut with the die. The die should also be run straight.

It’s recommended to drive the die half a circle forward and half a circle back and to clean it after applying oil or grease.

How to use Adjustable Die stock

  1. To hold your die in place, first fit it into your die stock. Before securing it with grub screws, adjust the width by turning a tapered central screw. There is a tapered lead-in on one side of the die to assist with thread alignment.
  2. Utilise the appropriate vise for the thread you are cutting. If you are cutting pipe, the rod should be clamped in a pipe vise, with the rod end no more than 12 inches from the jaws of the vise. To make sure the cutting spirals firmly contact the rod's diameter, turn the die's tightening screw, which is located by the side opening. Ensure that the die is not overtightened, as this will make threading difficult and weaken the threads.
  3. Die stock should be inserted with the printed side of the die facing you. All dies are marked with information on the sides. Make sure the die is securely attached to the stock by tightening the screws on the side of the die.
  4. Cut rods and die spirals should be brushed with cutting oil. Ensure that the face of the die and the stock are perpendicular to the end of the rod at all times. Position the center of the die against the end of the rod, facing you.
  5. As you rotate the die clockwise, push it against the rod about 1/2 turn and then turn it counter clockwise about 1/4 turn, which helps remove metal shavings (swarf) from the rod.
  6. Remove the die by rotating it counter clockwise. Using a rag, clean the threads of the rod and the die of all cutting oil and shavings.
  7. You can use thread gauges in order to measure the number of threads per inch on a bolt. For example, you can use them to calculate how large of a hole you need to drill for a specific thread, or just to find out what kind of thread you have.

Depending on your intended outcome, threads, and tools, you may find you need a slight variation of this process to fit you. However, if you’re using an adjustable die stock, you can expect to follow a similar set of steps.


How Threadtools can assist you

ThreadTools has the die and adjustable die stock you need.

If you’re undertaking a construction project that requires threading, it’s essential that you’re utilising high-quality equipment for your work. After all, if a job is worth doing, it’s worth doing properly!

This is where we can assist you. We have years of valuable experience in the industry and are committed to helping you achieve the best results in your work.

We can assist you in finding the tools you need and the best choice for your project. At Wiseman Thread Tools, each and every one of our products and threads is high quality and fully reliable for your needs.

Contact us here to learn more about how we can help.