dougle40
Member
Just thought I'd add this litle bit of info .
I went to a "Buck" store and found a set of 8 metric drill bits for a buck and bought the set . They turned out to to be lousy for drilling holes but I've been able to re=work them for use with a pen mill.
I hand ground the ends (on a 6x3/4" grinder) to fit into the pen mill. The tubes all seem to be 1mm smaller inside than the O/D so a 6mm fits a 7mm tube , a 7mm fits an 8mm and a 9mm fits a 10mm tube .
While they don't look pretty , they all work great , I've already tried them out .
Could be an inexpensive way to get the right sizes for all your kits .
I went to a "Buck" store and found a set of 8 metric drill bits for a buck and bought the set . They turned out to to be lousy for drilling holes but I've been able to re=work them for use with a pen mill.
I hand ground the ends (on a 6x3/4" grinder) to fit into the pen mill. The tubes all seem to be 1mm smaller inside than the O/D so a 6mm fits a 7mm tube , a 7mm fits an 8mm and a 9mm fits a 10mm tube .
While they don't look pretty , they all work great , I've already tried them out .
Could be an inexpensive way to get the right sizes for all your kits .