Re: drill bits

Tony Thompson

Rick Aylsworth wrote:

Hi Tim, "high speed" steel or HSS is a highly alloyed steel (M2 is a common alloy) that holds an edge at a dull red heat. Therefore it can withstand "high speed" drilling. For modeling purposes, it is simply a more wear-resistant bit than carbon steel. HSS is the most common for general purpose drill bits. Carbon steel is inferior, and is used for cheaper bits, which are often made to lower standards of accuracy.

       And HSS bits are not as brittle as plain carbon bits. That makes a real difference too.

Tony Thompson             Editor, Signature Press, Berkeley, CA
2906 Forest Ave., Berkeley, CA 94705
(510) 540-6538; fax, (510) 540-1937; e-mail, tony@...
Publishers of books on railroad history

Join to automatically receive all group messages.