Considering its current definition (see below) and the wish to be politically correct, I wonder whether the word has come to acquire any racist overtone.
What is a coal miner hewer-Ask.com. Coal miner hewer is a person who hews or cuts the coal from its natural situation. The hewer is the actual coal-digger removing it from the coal face.
A reamer is a type of rotary cutting tool used in metalworking. Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides.