One failing with Sherline - if they have any failings at all - might be the
maximum speed of the lathe spindle. While centering a piece of drill rod
with one of the sub-sized center drills ( about 3 sizes below #1) I was
quite perplexed when all of a sudden, it quit cutting and went to "buzzing".
Close examination of the work piece revealed the tip of the center drill
broken off and deeply imbedded in the, errr, "center" of the aborted
indentation on the drill rod. All this after prescribed "peck drilling" of
the center hole. Problem was, the center drill's tiny tip was so small as
to require either super delicate pecking or super fast spindle speed. Of
course, I had neither. Carbide to the rescue! The offending HSS center pip
was conveniently drilled out with my smallest solid carbide drill bit, about
1/8". Mr. Sherline didn't object in any way as carbide chewed away the
imbedded HSS center drill tip. Not going too deep with this rescue
operation left enough meat to effect proper, and very careful, center
drilling of the new "carbidized" spot on work piece. Besides the sloping
sides of the rescue hole left a nice oil-retention socket. It almost looked
as if it was planned that way.

Bob Swinney