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. Screw-machine-length drills arethe shortest available standard sized bits. They are used primarily in machinist workshops for screw machinesand are not usually available in hardware stores.

The term jobber refers to a wholesale distributor—a person or company that buys from manufacturers and sells to retailers. [ citation needed] Manufacturers producing drill bits "for the trade" (as opposed to for specialized machining applications with particular length and design requirements) made ones of medium length suitable for a wide variety of jobs, because that was the type most desirable for general distribution. Thus, at the time that the name of jobber-length drill bits became common, it reflected the same concept that names like general-purpose and multipurpose reflect. [ citation needed] Aircraft-length drill [ edit ] Fractional sizing uses whole, half (1/2), quarter (1/4), eighth (1/8), sixteenths (1/16) and sixty-fourths (1/64). Carbide-Tipped: Pricy, but these drill bits are very durable and stay sharp much longer than steel—even high-speed steel—and titanium options. These are mostly used to drill through tile, masonry, or concrete. Keep an eye on your drill bit, and it should not get too hot. Do not forget to sharpen the drill bit and use cutting fluid.The drill bit size you need for a wall plug will depend on which wall plug you use. Generally, you’ll need a drill bit that’s the same diameter (in millimetres) as the wall plug, but for accuracy, you can drill a pilot hole using a slightly smaller size drill bit first.

It is a durable coating that extends the life of the bit and bores through material faster than its counterparts, which is why titanium is one of the more popular materials on the drill bit market. The Bosch Tl14 14-piece titanium twist kit has a plethora of pieces to get through wood, sheet metal, plastic, Plexiglass, and vinyl siding, and it is strong enough to cleanly bore through cast-iron surfaces. Each drill bit is coated in titanium nitride. Inches are really popular in the USA but, beyond that, mostly used SI units. So we have to interchange the metric units and imperial units.This chart lists the North American drill gauge sizes and converts them to their decimal equivalent in both inches and millimeters for metric sizes. Steel: These are the least-expensive drill bits, but they are only suitable for soft wood and other materials. Cobalt: an incredibly strong alloy metal used to drill through tough materials. It can withstand heat and resistance and is the best drill bit for stainless steel. Drill bit sizes are written as irreducible fractions. So, instead of 78/64inch, or 114/64inch, the size is noted as 17/32inch.

Do not forget to pre-decide about what material you are working with, like the size for the drill bit changes depending upon the hardness of the material.Aside from stainless steel, it can be used for iron and bronze projects, as well as drilling into wood. If your projects often involve metal, this tiny workhorse performs well and produces professional results. It has a 1/2-inch shank. Although you aren't getting a complete set, this bit makes a great addition to your existing set, if you have the need for it. The below table will introduce you to the fractions and decimals of the inches with mm. How to Measure Drill Bit Size? In addition to drill bits being available in different types, they’re also available in various sizes to allow you to drill a hole that suits your needs. The list below gives answers to the most commonly asked questions around drill bit sizes: