Drill rod

Drill rod is steel" style="background-image: none; color: rgb(6,69,173); text-decoration: none; background-origin: initial; background-clip: initial" title="Tool steel">steel/" target="_blank" class="keylink">tool steel round stock with a tight tolerance diameter; it is usually ±0.0005 in (±0.013 mm). Diameters range from 0.0135 to 1.5 in (0.34 to 38 mm); in the United States diameters smaller than ²⁷⁄₆₄th of an inch are made in letter drill sizes and number drill sizes, in addition to fractional sizes. Lengths are usually one or three feet (0.3 or 0.9 m). It is commonly used to make drill  bits, taps, reamers, punches, dowel pins, and shafts.^[2] Note that the numbered sizes are different from the drill numbered sizes starting at 52. These sizes are:

Drill blanks have an undersize tolerance of +0/-0.0002 in, while reamer blanks have an oversize tolerance of -0/+0.0002 in.

Some mills also sell square stock that is held to the same tolerances under the name "drill rod".

Commonly available material grades in the U.S. are A2, D2, M2, M42, O1, S7, W1, and steel" style="background-image: none; color: rgb(6,69,173); text-decoration: none; background-origin: initial; background-clip: initial" title="High speed steel">high speed steel (including M2/M7).