I use a steady feed and try to drill so that the chips come out in two
long strings. When you get deeper, the chips will start to break into
pieces and then you need to retract the drill to get the chips out of
the hole. The pecking is more drill until the chips start to jam in
the hole, then retract and clear the chips. So with a .138 drill you
might get a half inch before the chips start breaking up. After that
you will probably only get about 1/4 inch more drilled until you have
to retract and clear the chips.

Jim Pentagrid wrote an excellent bit on the problems and solutions.

Dan


Pete & sheri wrote in message


Your comments about steady feed and pecking will help.


Thanks again,
Pete Stanaitis