Drill bit sizes

Drill bits are the cutting tools of drilling machines. They can be made in any size to order, but standards organisations have defined sets of sizes that are produced routinely by drill bit manufacturers and stocked by distributors.

Related Topics:
Drill bits - Drilling machines

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In the US, fractional inch and gauge drill bit sizes are in common use. In nearly all other countries, metric drill bit sizes are most common, and all others are anachronisms or are reserved for dealing with designs from the US. The British Standard on replacing gauge size drill bits with metric sizes in the UK was first published in 1959.

Related Topics:
US - British Standard - UK - 1959

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