Cole2534
Diamond
- Joined
- Sep 10, 2010
- Location
- Oklahoma City, OK
Hello all.
I make an extra deep-well socket as an application tool for an OEM. I was using Stressproof but the OEM has requested a stronger material so I selected ETD150...and it's kicking my ass.
The hole is .75" diameter and 7" deep, drilling in a Fadal VMC4020 with a PTD HSS drill. 75SFM, .008ipr, 0.188" pecks, no dwell. Rapid set to 25% (225IPM) to increase cooling during the peck feed moves. Coolant is Trim 690xt, ~8%.
It goes very well until about 4" deep, then squeals and spindle load goes through the roof.
I called Allied about a spade drill but without TTC they figured it was a fool's errand, and I think I agree.
Does anyone see any glaring errors here? I have 25 of these to do.
Thanks!
I make an extra deep-well socket as an application tool for an OEM. I was using Stressproof but the OEM has requested a stronger material so I selected ETD150...and it's kicking my ass.
The hole is .75" diameter and 7" deep, drilling in a Fadal VMC4020 with a PTD HSS drill. 75SFM, .008ipr, 0.188" pecks, no dwell. Rapid set to 25% (225IPM) to increase cooling during the peck feed moves. Coolant is Trim 690xt, ~8%.
It goes very well until about 4" deep, then squeals and spindle load goes through the roof.
I called Allied about a spade drill but without TTC they figured it was a fool's errand, and I think I agree.
Does anyone see any glaring errors here? I have 25 of these to do.
Thanks!