Twist drills do not make accurately sized or good finish holes; a reamer of some type is often used to cut the final size and finish. A reamer will not make the original hole; it will only enlarge a ...
It’s become a common sight in manufacturing. An employee, needing to tap a hole in a metal part, reaches for a standard hand drill instead of the tool designed specifically for the job—a tapper.
MACHINE TOOL INDUSTRY. FRANK A. SCOTT, a Clevelander at the forefront of the machine tool industry during the early 1900s, once remarked that no metal could be available for modern uses until a ...
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