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How to Use a Step Drill Bit?
When I first came across step drill bits I was actually quite confused about their use. Once I started looking into their uses I was really excited to invest in my own set of step drill bits. With experience, I have come to appreciate step drill bits even more with their multitude of uses.

If you are new to step drill bits, this article will answer each and every question in your mind.

How to use a step drill bit? You will use a step drill bit just like another drill bit with an exception of its purpose of use. For drilling with a step drill bit use a center punch to first mark the center. Now drill steadily with firm pressure. Step drill bits only work with thin metal sheets and can make holes of different sizes depending on the number of steps in your drill bit. You can also use it to enlarge or deburr an existing hole.

About Invention
Drill bits are cutting tools used to create cylindrical holes, almost always of circular cross-section. Drill bits come in many sizes and have many uses. Bits are usually connected to a mechanism, often simply referred to as a drill, which rotates them and provides torque and axial force to create the hole.

What is a Step Drill Bit?
A step drill bit is a conical shape drill bit to make different size holes with one bit. It has multiple levels with increasing diameters from tip to end. It has a sharp groove at one side which acts as the cutting edge. The step drill bit is also used to enlarge or deburr holes. This drill bit is used particularly for metals but can also work with wood, plastic, etc.

A step drill bit with a straight flute is called a counter-bore step drill bit while a step drill bit with a twisted flute is called a countersink step drill bit. The flute or the groove profile serves as a channel system for collection and chip removal during drilling.

I have found the step drill bit to be a valuable tool with its ability to replace numerous twist bits, deburrers, and reamers. There are a number of reasons you should use a step drill bit for drilling into sheet metals.

I have compiled a list of reasons I recommend every DIY enthusiast to add step drill bits to their toolbox.
http://www.ceres-tools.com/drill-bits/step-drill-bits/