This is especially helpful if you can’t read the engraved size markings on the bits. You can also size drill bits by pushing them through holes. A simple plastic drill chart sheet with perfect round holes and markings on it lets you do a couple of things.įirst, you can size screws simply by inserting them into a hole then reading the marking. Over time, you get so that you can literally eye-ball it and make an educated guess.īut if you’re looking at a less common drill bit size, you need an aid to help you.Ī drill bit size hole card can be very helpful for this. If you’re an average weekend-warrior, you’ve probably stared at a screw or bolt for a few moments and wondered what size drill bit you would need. How Do You Know What Size Drill Bits You Need? To avoid break-outs and chipping, you can stick to bigger round-shank types.įor shank bits, you’ll work with these sizes (values in inches): 1/2 If you need drill bit sizes that are larger than 1″, you can often use a spade bit for wood and other soft materials.
Here would be the standard drill bit sizes for spade bits (13-pieces): 1/4″ In between in these large tiny and large sizes are every equivalent bit size known to “man”, so you always have the exact size needed depending on what you’re project is calling for. Sets with even more varying drill bit sizes would include diameters smaller than 1/16″ or larger than 1-1/2″. Specialty fasteners sometimes call for a size that would be considered uncommon. This would generally apply to many drill bit types, such as black oxide, titanium, carbide, high-speed steel and masonry (concrete), to name a few.īasic, twist-type drill bit sizes (fractional): In the following drill bit chart are the typical fractional sizes this kind of set would include. Say, for example, a typical 29-piece set. One that could serve any of the above mentioned disciplines well. Various bit types exist for a wide variety of applications, and in particular what material you’re drilling into.įor the sake of simplicity, let’s look at a basic multi-purpose set. Using our drill chart that follows below, you’ll get an idea of just how many sizes there are! (And much more when you factor in different types of bits).
In fact, most nice sets include anywhere from 12-30 pieces of standard drill bit sizes. Thankfully, we can narrow it down a a lot to some standard sized holes for bolts and screws as well as for bits.įor example, let’s look at the most common applications:Įveryday home repair and construction projects, hobby, marine, farming, woodworking, metal working, aircraft, arts and crafts, commercial building projects, machinery and more.įor each particular application area, you’re going to just see a few dozen or so relevant drill bit sizes. Well, if you base your answer on how many size holes there are in the world, then there would be infinite amount of bits! If you were to look at the most all encompassing collection of multi-purpose, twist-type bits, how many drill bit sizes would there be? How Many Drill Bit Sizes Are There?įirst things first. Scroll down if you just need a quick reference using our drill chart. We’ll discuss these in detail in this article.
#2 step drill bit full
Many times, we’re just trying to find out the alternative sizes available if you’re working with metric sizes (measured in millimeters) versus standard or empirical values (our familiar fractional inch variety).Ĭheck out our full drill charts below for a quick reference to find all drill size equivalents.įinally, getting the right size drill bit set in your greater tool “chest” will arm you for the various types of projects you’re doing. It may not be totally evident at first glance. Knowing just what size you need to use for the hole you’re making is also important. Having the right drill bit sizes on hand for your particular repair or building task is essential for any seasoned carpenter or weekend-DIY’er.
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