![]() 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. ![]() All of these drill bits are different in size except for the 90 and. The metric sizes are dispersed throughout. So we have to interchange the metric units and imperial units. Inches are really popular in the USA but, beyond that, mostly used SI units. Where the number 1 drill bit leaves off the letter A (smallest) begins and continues through the letter Z (largest). You can multiply by 25.4 of inches value when you convert that to mm. A 7 drill bit is a specific size used for drilling holes in various materials, and the equivalent size for a 7-inch drill bit is a 0.201' diameter bit, 13/64' is 0. The numbers range from 107 (smallest) to 1 (largest). The Ultimate Drill Bit Size Chart American National Standards Institute (ANSI) drill bit sizes are used predominantly in the United States and utilize the Imperial measurement system. The fractions range from 1/64 inch to 32/64 inch. ![]() 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. drill size decimal equivalent & tap drill chart decimal equivalent chart drill decimal size mm equivalent 0.10. Decimal Equivalents - Numbered Drills No. ![]()
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