Machinist Drill Bit Chart

The drill size chart provides a list of standard size drill bits in several measurement systems including fractional metric wire gauge number and letter. Download our free structures textbook and analysis manual or view the online version aa sb 001. These specialist drill bits are used for drilling centre holes at two different angles 60 degrees and 90 degrees.
machinist drill bit chart

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The decimal equivalents of the diameters are shown in both english and metric units.

Machinist drill bit chart. The drill size chart below contains all commonly used centre drill bit sizes. The web page contains the following. The charts have the dimensions for the drill size chart listed several different ways to help convert to the different units. Centre drill bit sizes.

Machinist drill bit size table ansi drill size chart iso metric drill bit size table. Fractional and metric sizes ref. They are commonly used to drill lathe centres and spotting drills iemarking holes to guide twist drilling. The drill size chart can be used for any drill machine and this chart would be used near the drill or milling machine.

Millimeter to inch conversion. The drill size chart is listed fractionally by alphabetically and numberically. Machinist drill bit size chart ansi size drill chart iso metric drill size chart engineers edge. Drill size decimal equivalent tap size 19 39 32 5938 64 5 6094 41 8 6250 64 21 6406 43 32 6562 34 10 64 11 6719 45 16 6875 34 16 64 23 7031 47 32 7188 64 3 7344.