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They are commonly used to drill lathe centres and spotting drills, i.e.marking holes to guide twist drilling. The drill size chart below contains all commonly used centre drill bit sizes.
The drill size chart below contains imperial and metric drill bit diameter measurements for all number and letter gauges.
A printable chart of drill sizes from 0.2087 to 1.0000 inch range, with size designation and letter codes. The chart also shows the size in millimeters and inches for each drill size.
Find the right size of drill bit and tap for female and male screw threads with these charts. Download and print free PDF files for millimeters and inches measurements, and learn how to use them.
The drill size chart provides a list of standard size drill bits in several measurement systems, including fractional, metric, wire gauge number, and letter. The decimal equivalents of the diameters are shown in both English and Metric units.
Find the decimal equivalent of drill sizes in millimeters and the tap drill chart for different thread sizes. The chart shows the drill size, decimal equivalent, and tap drill for each size in a table format.
TAP/DRILL RECOMMENDATIONS MACHINE SCREW, FRACTIONAL & METRIC SIZES Inch Metric Cutting Taps Forming Taps Tap Size & Pitch Drill Size Dec. Equiv. Drill Size Dec. Equiv. 0-80 3/64 .0469 54 .0550 M1.6 x 0.35 1.25 .0492 1.45 .0571 M1.8 x 0.35 1.45 .0571 1.65 .0650 1-64 53 .0595 51 .0670
Drill Sizes and Conversions Drill Sizes Conversions Numbers & Letters Fractional Metric Inch mm 1.01 0.0398 1.010 60 0.0400 1.016 1.02 0.0402 1.020
US Tap and Drill Bit Size Table 8531 S. Freeway Drive • Macedonia, Ohio 44056 (800) 232 - 2659 • Fax: (330) 468–3302 www.scfastening.com
The drill bit size chart provides equivalent sizes for letter, metric, wire gauge, and fractional drill bit sizes, allowing the user to select the correct drill bit for their project.