Cat-50 Holder run-out
Cat-50 Holder run-out
(OP)
We have some 50-taper machines (SNK-machines with in-spec 3500lbs. of pull pressure) that have habitually collected pitting and wear on the holder taper.
It has resulted in regular spindle taper regrinding.
We have been recently evaluating the run-out condition of our holders with a proper check fixture, one holder company recommends replacing tools with .0003 or more run-out.
We had to raise the standard to .0005, which still captured over half of our tool holders, many of the new and unused.
Can anyone accurately regrind these 100s of holders or will they need replaced?
Has anyone else had similar machine spindle / holder wear issues?
It has resulted in regular spindle taper regrinding.
We have been recently evaluating the run-out condition of our holders with a proper check fixture, one holder company recommends replacing tools with .0003 or more run-out.
We had to raise the standard to .0005, which still captured over half of our tool holders, many of the new and unused.
Can anyone accurately regrind these 100s of holders or will they need replaced?
Has anyone else had similar machine spindle / holder wear issues?





RE: Cat-50 Holder run-out
Here are just two of numerous companies that can refurbish tooling. We had Locher do some rework for our manufacturing area and I can't recall any problems.
http://www.spindles.org/default.asp
http://www.precisionspindleinc.com/default.html
RE: Cat-50 Holder run-out
Thanks for the great links!
We have a company that reginds our spindles, my search is for re-justifying the holder tapers.
Or maybe finding others with SNK spindle issues.
Thanks for your input!
RE: Cat-50 Holder run-out
RE: Cat-50 Holder run-out
It comes with a standard and is made by a top holder manufacturer, who gave us the .0003 spec which few of thier tools measure up to.
You see if the taper isn't perfect it allows the holder to wollow in the spindle under cutting conditions, causing premature wear.