Written on October 21, 2010 at 7:02 pm by Power Tool Team

Size Drill Bit

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Size Drill Bit
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Should You Own a Step Drill Bit Set?

There are a lot of different types of drill bits on the market and some are a lot more useful than others. Many people may be wondering whether or not a step drill bit set is really worth the investment. For some people these types of bits may not carry many benefits, while others can't live without them. In order to decide whether or not this type of bit is right for you, it is important to look at what it can do as well as what the alternative tools might be, such as a collection of reamers.

A step drill bit or unibit is a conical bit with a specific stair step design. This design allows the same bit to be used when creating multiple sizes of holes. Most of them are designed to enlarge holes, much like reamers do, however some have pointed tips so that they can be used to start holes as well. Any of the larger bits will be for enlarging holes only and will likely not have the self starting option. As they have become more popular, they have also become less expensive while offering a much greater selection in terms of size and ability.

The most common situations that you would need to use a step drill bit would be with general construction and plumbing. This is because a single bit can drill or enlarge holes across an entire counter top or speed up the installation process of most in-home fixtures. They can be used a wide variety of materials including thinner woods (plywood and particle board), drywall, laminate, acrylics, etc In some cases they can even be used on thin sheets of metal.

A step drill bit can also be used to debur holes. This is because the sharp increase from one step to another can allow the cutting edge to scrape the burrs off of the entry surface. However, these bits are not ideal for ejecting the burs inside of holes; this is a tricky thing to deal with. In other areas related to drilling holes, they do a great job. In most situations it can be difficult to tell whether or not chip ejection will be an issue so it is a good idea to "peck" at the holes rather than quickly push through them.

As you can see, when deciding whether or not you should own a step drill bit, there are a number of different things to consider. The most important thing to consider is how effective they will be at completing your task. For example, most people would prefer them to using reamers if they will be working with many different sizes of holes consecutively. This is because a single bit can take care of every hole whereas a reamer could not. On the other hand, depending on the level of precision needed and materials that you will be working with, a reamer may work out just fine. In general, a step drill bit can replace a lot of other tools for general purposes and a set of bits would probably be a good investment.

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For more information on
step drill bit
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reamers
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what size screw do you use with what size anchor and drill bit?

Your question is very general.
It depends on type of anchor.

This webpage should answer your question:

http://www.naturalhandyman.com/iip/inffastener/infanchor/infanchor.html

Drilling concrete FRP with dri- bit drill - size 2.125" dia.