Drill Bit Sizes Explained. Ansi size drill bit chart. Number and letter sizes are in common use in the us, and to a lesser. It may not be totally evident at first glance.
They can be made in any size to order, but standards organizations have defined sets of sizes that are produced routinely by drill bit.
The classification system currently in use was developed by the international association of drilling contractors (iadc). Cylindrical in shape in a double helix pattern with a. Not sure which drill bit you need or what you need in your toolbox? Threaded shank drills, special sizes. For either drill, it is easiest, and best suited, to simply look up the value in a table. The classification system currently in use was developed by the international association of drilling contractors (iadc). Number and letter sizes are in common use in the us, and to a lesser. The information available from our sources is usually sufficient for all computer related drill.
