Roll taps FORM a thread by material deformation, as opposed to cutting the material and therefore not producing any chips. Roll taps produce stronger and cleaner threads than cutting taps as the lack of swarf means that the tap cannot break as a result of the flutes clogging.
Our YG-1 Roll Taps (pictured left) feature a TiN coating for improved tool life and a HSS-PM substrate for ultimate wear resistance. Available with or without oil grooves to aid lubrication.
A conventional tap cuts a thread as opposed to forming the material. Cut taps are more popular than roll taps as they cover a wider range of materials, and also feature material specific geometries. For a Blind hole you would opt for a spiral flute, which brings the swarf out of the hole, whilst for a through hole you would opt for a spiral point tap.
A conventional CUT tap is more versatile than a cold form roll tap as it can be used on a wider range of materials and this kind of tap can be used on both manual and CNC machines. Due to these properties (in particular the fact that a wide range of materials are covered), cut taps are a great all-rounder. However, if the material is proven tricky or is a small size, you should opt for a form tap for safety.
What conventional taps do Cutwel sell and what are the features and benefits of these?
In contrast, a general purpose tap is a great all rounder if you are a sub contract machine shop or if you machine lots of different materials daily. General purpose taps usually come with a few options in terms of coatings, which should be chosen in respect to the type of material being machined.
Examples of our material-specific cut taps are shown below:
When would you use a roll tap over a conventional cutting tap?
Since a cold forming roll tap produces the thread by displacing the material, they have to be much stronger than conventional cut taps. Due to the fact that the drilled hole is bigger with a forming tap, it creates less stress on the both the material and the machine, as well as the tap.
Roll Tapping vs Conventional (Cut) Tapping – which is better?
Both roll tapping and conventional tapping have their benefits and it really does depend on the machine, material and the size of the thread you are wanting to produce. Cutting taps tend to cover more materials and have a wider choice of geometries, however, roll taps have a place where you need a stronger tap (possibly in smaller holes or large holes (e.g. M20)). I would certainly give the technical team a call to discuss your application and let our experts recommend the best tap for your machine, material and application.
You can call the Cutwel technical team on 01924 869615 or email firstname.lastname@example.org and we will get back to you as soon as possible.