Frequently Asked Questions (FAQs)
1. Is thread milling better than tapping?
Thread milling is generally considered better than tapping because it requires lower cutting forces and is easier on the machine tool. Additionally, thread milling allows for cutting larger holes since the thread mill will cut the hole larger.
2. Can you thread mill with a tap?
No, thread milling and tapping are two different processes. Taps are used exclusively for interior threading of holes and cannot be used for milling threads onto the outside of a post or screw.
3. What is the difference between thread tapping and thread milling?
The main difference between thread tapping and thread milling is that with thread milling, a full thread profile can be obtained all the way to the bottom of the hole, even where it is usually not possible. Tapping, on the other hand, may require drilling deeper to achieve a complete thread profile.
4. How deep should a cut be for thread milling?
The true radial depth of cut in internal thread milling applications depends on the threading diameter, cutting diameter, and pitch. It can be larger than the chosen radial depth of cut, which may increase the deviation in the root of the thread.
5. What tap is best to start cutting a thread?
For starting threads, taper taps are commonly used. They have a gradual taper along the length of the tap. Plug taps, with a shorter taper and larger diameter, are used for threading through holes.
6. Which type of tap can make threads without a machine?
Taper taps are the easiest taps to use by hand because the material is removed with multiple partial forms of the tap's thread.
7. What are the 3 main types of taps used to make threads?
The three main types of taps used to make threads are taper, plug, and bottoming taps. Taper taps have a visible and pronounced tapering of the cutting edges, providing a gradual and less aggressive cutting action.
8. Can you cut threads on a milling machine?
Yes, threads can be cut on a milling machine using a single point thread mill. This offers great versatility, allowing for the cutting of a wide range of threads, including custom pitch, right hand or left hand, inside threads, and outside threads, all with one tool.