![]() There are also bits for drilling holes into concrete, plastic, metal, wood, and other materials. These sizes are measured in both metric units and imperial units using a gauge. See the chart below for these specifications. Drill bit diameters and lengths are available in different sizes. Jobber length drill bits flute length and overall length are dependant on the diamater of the drill bit. You can drill soft materials with any bit, but for hard or brittle materials like acrylic or glass, you might need specially designed bits. Drill Bit Sizes in inches and mm: Chart, Convert, Measure. You can drill just about anything - it all depends on picking the right bit size. Also, drills with half an inch chuck will work with larger bits that are half-inch in diameter.Ĭhoosing the right size of the drill bit will mean that you will be able to get the hole drilled with the least amount of trouble and without causing any damage to the material, yourself, or the tools. How do I know my drill size To determine your drill size, you can refer to the markings on your drill bit or measure the diameter of the bit using a caliper or ruler. ![]() Drills with a ⅜-inch chuck will accept bits that are ⅜-inches in diameter. The standard drill sizes typically range from 1/16 inch to 1 inch, with incremental increases of 1/64 inch or 1/32 inch. The first and foremost thing is to ensure that the size of the drill bits shank matches your drill size. Auger drill bits: are used to make deep holes in soft materials like wood. The numerical value usually falls between 1/4 and 1-3/8 inches. Why Does the Size of My Drill Bit Matter?ĭifferent drill bit sizes are suitable for different purposes. Step drill bits: are used to drill holes of various diameters since they have several stepped sizes on a single bit. The drill bit will then spin clockwise to create a hole. 0 Wood Screw Pilot Drill Size (softwood) 0. To use them, insert the upper end, also known as the shank, into the chuck in the drill. Drill Bit Size Chart Legend: Fractional Inch (1/X') Letter Drill Sizes (A-Z) Millimeter Std Sizes (0.5-25) Number Drill Sizes (1-80) Inch (dia.) Size mm (dia.) Tap Drill / Common Uses 0.0059' 97: 0.15-0.0063' 96: 0.16-0.0067' 95: 0.17-0.0071' 94: 0.18-0.0075' 93. ![]() For clearance holes, add 1/64 to 1/32 inches, resulting in hole sizes of 15/64 inches (0.234 inches) for a close fit, and 1/4 inches (0.250 inches) for a free fit. The M6 bolt diameter in inches is approximately 0.236 inches. ![]() They are attached to the drill, which, when switched on, rotates to power through the workpiece, creating holes of circular cross-section. To convert this to inches, divide by 25.4 (1 inch 25.4 mm). Drill bits come in various sizes and shapes. A drill bit is a cutting tool used with the drill to create holes in almost any material. ![]()
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