28mm which are both 0.0110 inches in diameter, the 13 and the 4.7mm which are both 0.1850 inches in diameter, the 4.8mm and the 12 which are both 0.1890 inches in diameter, and the 1/4 inch and letter E bits which are both 0.250 inches in diameter.Īll of the drill bits are listed below with their decimal equivalents. 22mm which are both 0.0087 inches in diameter, the 85 and the. For new construction, it’s essential to know which drill bit corresponds to which screw size. All of these drill bits are different in size except for the 90 and. The metric sizes are dispersed throughout. Where the number 1 drill bit leaves off the letter A (smallest) begins and continues through the letter Z (largest). The graph for the most part incorporates bit sizes beginning from minuscule diameters like 0. Also, drills with half an inch chuck will work with larger bits that are half-inch in diameter. A drill bit size diagram is a table or visual that exhibits the scope of accessible drill bit widths, alongside the expected employments and appropriate materials for every drill bit size. Drills with a -inch chuck will accept bits that are -inches in diameter. The first and foremost thing is to ensure that the size of the drill bits shank matches your drill size. The drill size chart below contains all commonly used centre drill bit sizes. The numbers range from 107 (smallest) to 1 (largest). Different drill bit sizes are suitable for different purposes. Drill Sizes and Conversions Drill Sizes Conversions Numbers & Letters Fractional Metric Inch mm 1.51 0.0594 1.510 53 0.0595 1.511 1.52 0.0598 1.520 1.53 0.0602 1.530 1. They are commonly used to drill lathe centres and spotting drills, i.e.marking holes to guide twist drilling. Sutton Tools Drill Size & Decimal Equivalent Chart. The fractions range from 1/64 inch to 32/64 inch. Table values compiled from: Fastener Black Book First Edition. You will see drill bits with a fraction, number, letter or metric number stamped on their shank indicating their size. Drill bits from zero to one half inch are sized in four ways fractions, wire gauge numbers, letters, and metric in millimeters.
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