Just wondering if you more experienced members can make an recommendations:
303 Stainless, .089" dia hole, thru, 3.84" part length.
Current approach:
Main Spindle
#43 MA Ford 205 series drills, 1" deep, .002 ipr, 6000 rpm, .050 pecks.
#43 Gurhing 336 series parabolic, 1.85" deep, .0015 ipr, 2000 rpm, .050 pecks.
Sub Spindle
#43 MA Ford 205 series drills, 1" deep, .002 ipr, 6000 rpm, .050 pecks.
#43 Gurhing 336 series parabolic, 2.20" deep, .0015 ipr, 2000 rpm, .050 pecks.
Tolerances are .089"+.005/-.010. Some mismatch is allowed, but the go pin must slide entirely through the part. I can only reach about 2 inches deep on the main and 2.2 inches on the sub on my Citizen A20. No HPC on the machine... for now.
The process above worked well but would like to look for improvements in tool life and mismatch (the long cobalts look used up at 400 pieces and mismatch was increasing). Thinking Titex might have something that would work better?
Dan