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What Is The Difference Between An Upcut And Downcut Bit?

With any machining job, it is important to make sure you are using the correct cutting tool, otherwise you may find that you get a finish that is not appropriate for the piece and you may then have to spend time and money doing it again with the right tools. Two common types of bits are upcuts and downcuts, which we will be discussing in this piece.

What is an upcut bit?

An upcut bit is a tool designed to quickly move chips up and away from the surface being cut. The grooves in the bit will pull the debris up so that it will not stay in the area being cut. The design of this tool means that it is able to be used at a higher speed than some other tools. Upcut bits give great bottom finishes.

What is an upcut bit used for?

An upcut bit is used for high-volume jobs, that have rapid cuts, thanks to the quick removal of chips. It is also recommended for use with thicker materials. Thinner or soft materials do not tend to work as well with upcut bits, as they are likely to be moved by the force of the cuts, which results in jagged or unsuitable edges. Typical jobs completed with upcut bits include grooving and slotting.

What is a downcut bit?

The design of a downcut bit means that its method of chip removal is to push the chips down into the surface, which can make it less effective and will mean that you will need to consider some form of vacuum to clear them away. Downcut bits require lower speeds to produce quality goods and will produce a fantastic finish on the top of the piece.

What is a downcut bit used for?

A downcut bit is used for jobs that need a smoother finish, such as dadoes and inlays, especially those that require shallower cuts. Downcut bits, unlike upcut bits, are suitable for thinner and softer materials so they will produce the desired effect without damaging the material.

When buying an upcut or downcut bit, check that it has been specially designed for the material with which you will be using the tool. If you are unsure which one will work the best for your job, get in touch with our expert team and we can guide you to the right choice. Call us on 01329 246070 or email us at info@cutter-shop.com today.

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