TAPPING DRILL SIZES
drawn up by the late Dennis Monk

While there is no shortage of tables of drill sizes for tapping a reaming, mostly these are based on full engineering practice. These tables have been developed for practical use by model engineers with the sort of tooling they might have available. They were drawn up by the late Dennis Monk, using data from other members of the SMEE. Download to see full size and print. You might like to laminate them for use in the workshop - or just print a new set when needed. The range covers most sizes likely to be encountered.

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GO TO REAMING SIZES