Drilling true and correctly dimensioned holes and cutting accurate
threads are basic requirements in all engineering work, but as in
all areas of engineering new materials and new techniques lead to
alterations in standards. Many of these are primarily concerned
with production engineering and are well documented, but others
affect the quite different the discontinuation of 'number' drills
and the phasing out of cycle threads; add the currently book
written with the small user in mind is apparent. Drills, Taps and
Dies not only provides comprehensive tables of all the tools
available or likely to be encountered but also explains the
differences in various types of drill and thread form and their
practical applications. One of the features of the book is a
thorough examination of the correct size holes for thread tapping,
which in itself could save readers the cost of the book several
times over, in the avoidance of broken taps!
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