Rcgiovannani
Aluminum
- Joined
- Apr 6, 2015
Hi Guys,
Having a problem and Harvey Tool isn't open today.
I'm running a job in pure aluminum, Series 1000. I'm using Harvey 879308-C8 (DIA 0.125, .187LOC, 1.500RCH, 3FL, - V-Helix with TiB2 coating). It's 12X Reach. Machine is BT30, running Nikken BT30-MMC8C-105-AA holder. Currently the tool is running out about .0001"-.00015" (I only have a tenths indicator, it's running out a little more than a tenth).
I'm getting terrible chatter with the parameters I was given. Here they are:
Roughing (full slot)
RPM - 27K
Axial DOC - .035"
Feed - .0007ipt (56.7ipm)
Finishing
RPM - 27K
Axial DOC - .125"
Radial DOC - .010"
Feed - .00097ipt (78.6ipm)
The feature I'm creating is a 5mm Diameter, flat bottom hole. It's 27mm deep. I am drilling out the center with a 2.26mm Drill before the roughing.
I also tried helically boring the hole with no luck. Also reduced RPM to 15280 (500 sfm), with the same feed per tooth and no luck. I feel like I can never get these long reach tools to cut well... Also played with the feed override a bit - 50-150% and couldn't get rid of the chatter.
I just discovered that Harvey makes a flat bottom drill that will work, but I can't really wait for Tuesday...any help is greatly appreciated!
Having a problem and Harvey Tool isn't open today.
I'm running a job in pure aluminum, Series 1000. I'm using Harvey 879308-C8 (DIA 0.125, .187LOC, 1.500RCH, 3FL, - V-Helix with TiB2 coating). It's 12X Reach. Machine is BT30, running Nikken BT30-MMC8C-105-AA holder. Currently the tool is running out about .0001"-.00015" (I only have a tenths indicator, it's running out a little more than a tenth).
I'm getting terrible chatter with the parameters I was given. Here they are:
Roughing (full slot)
RPM - 27K
Axial DOC - .035"
Feed - .0007ipt (56.7ipm)
Finishing
RPM - 27K
Axial DOC - .125"
Radial DOC - .010"
Feed - .00097ipt (78.6ipm)
The feature I'm creating is a 5mm Diameter, flat bottom hole. It's 27mm deep. I am drilling out the center with a 2.26mm Drill before the roughing.
I also tried helically boring the hole with no luck. Also reduced RPM to 15280 (500 sfm), with the same feed per tooth and no luck. I feel like I can never get these long reach tools to cut well... Also played with the feed override a bit - 50-150% and couldn't get rid of the chatter.
I just discovered that Harvey makes a flat bottom drill that will work, but I can't really wait for Tuesday...any help is greatly appreciated!