I have this job drilling 1/4" SHCS 18-8 x 3/4" length with a 9/64 hole. My present operation uses cobal 135 split point, 1200 rpm and 2 ipm feed, pecking at 0.075" mostly
G98 G83 X? Y? Z0.8041 R0.1124 I0.24 J0.075 K0.08 P0 F1.956 to be exact.
I am prepping the bottom of the hex with a .125 endmill to make it flat, otherwise the drill wanders too much. The main issues are #1 speed, and #2, rats nests. I have a jig that holds 120 pieces, so I almost have to keep an eye on the whole process. Also, I basically need to change the bit after 120 pieces.
I have done some experimenting with carbide drills, and my experience is that it rats nests a little, and after about 15 holes it snaps, pretty much at the different feeds and speeds I tried.
My machine is a VF2, without through hole coolant. Any ideas on a better process?
G98 G83 X? Y? Z0.8041 R0.1124 I0.24 J0.075 K0.08 P0 F1.956 to be exact.
I am prepping the bottom of the hex with a .125 endmill to make it flat, otherwise the drill wanders too much. The main issues are #1 speed, and #2, rats nests. I have a jig that holds 120 pieces, so I almost have to keep an eye on the whole process. Also, I basically need to change the bit after 120 pieces.
I have done some experimenting with carbide drills, and my experience is that it rats nests a little, and after about 15 holes it snaps, pretty much at the different feeds and speeds I tried.
My machine is a VF2, without through hole coolant. Any ideas on a better process?