I have 32 Hammond 1591LSBK boxes that I want to drill one 9 mm hole and and two 10 mm holes on the sides. I have tried drilling a few using a stepped cone cutter. My aim of using the stepped cone cutter was to save the changing bits. However, the process has been derailed by the accumulation of slag on the trailing edge of the cutter.
To try to safe the situation, I tried low speed and high speed but none of the options helped. I also tried slow plunging and later the rapid plunging but still there was no improvement.
What could be the problem? or am I missing something?
Last edited by vinMax
on Sun Apr 03, 2016 5:22 pm, edited 2 times in total.