Standard Drill Size Chart

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The drill size chart provides a list of standard size drill bits in several measurement systems including fractional metric wire gauge number and letter.

Standard drill size chart. Drill bits also called twist drills are available with straight or tapered shanks though the most common drill bits will have straight shanks. Tables of the standard drill bit sizes metric fractional inch and wire gauge commonly used in cnc machining. Fractional drill bits are definedby the ansi b9411m 1979 standard. Drill size decimal equivalent tap drill chart decimal equivalent chart drill decimal size mm equivalent 010 0039 020 0079 025 0098 030 0118 80 034 0135.

The decimal equivalents of the diameters are shown in both english and metric units. Fractional and metric sizes per. Most commonly used in the us but can still be found occasionally in the uk these imperial measurement drill bits come in 164 inch increments. Click here to download a printable drill size chart.

Fractional inch drill size chart. Click here to download a printable drill size chart.