T Bigelow
Plastic
- Joined
- Mar 29, 2011
- Location
- Long Island, NY, USA
I am currently using parlec c40-20er412 collet chucks with their "power nut" and pull studs for a Haas cat40 spindle. I am new to cnc manufacturing, this is my first experience with cat tooling and ER type collets as such I'm having a few issues with tool T.I.R and collet disassembly.
When I assemble a tool in the collet chuck I am using a norbar 200th torque wrench purchased from techniks to tighten the collet nut and pullstud to approx. 85% of parlec max spec. Depending on the day I get anywhere from .0002 to .0008 T.I.R., once I even had .0015 T.I.R. If I torque the pullstud and put just the tool holder in the spindle I get max .0002 T.I.R. Thus it seems to be how the collets are seating in the holders.
To compound my problems when I go to disassemble the holder the collets seem to stick in the taper, to the point where I have to stick a drift pin through the holder and tap lightly on the back of the tool as I loosen the collet nut. The reason for doing this is to avoid distorting the collet, I have damaged a few collets and even destroyed a powernut because of this problem.
Seeing how I am new to cnc I'm not ruling out anything, especially human error.
Main question, has anybody run into these issues before?
Anyone have problems in the past with parlec tooling or norbar torque wrenches?
Any input would be appreciated.
Thanks,
Tom
When I assemble a tool in the collet chuck I am using a norbar 200th torque wrench purchased from techniks to tighten the collet nut and pullstud to approx. 85% of parlec max spec. Depending on the day I get anywhere from .0002 to .0008 T.I.R., once I even had .0015 T.I.R. If I torque the pullstud and put just the tool holder in the spindle I get max .0002 T.I.R. Thus it seems to be how the collets are seating in the holders.
To compound my problems when I go to disassemble the holder the collets seem to stick in the taper, to the point where I have to stick a drift pin through the holder and tap lightly on the back of the tool as I loosen the collet nut. The reason for doing this is to avoid distorting the collet, I have damaged a few collets and even destroyed a powernut because of this problem.
Seeing how I am new to cnc I'm not ruling out anything, especially human error.
Main question, has anybody run into these issues before?
Anyone have problems in the past with parlec tooling or norbar torque wrenches?
Any input would be appreciated.
Thanks,
Tom