dsergison
Diamond
- Joined
- Oct 23, 2003
- Location
- East Peoria, IL, USA
I have the tree j325. I was having chatter issues with one particular holder and i noticed i could spin it BY HAND without the drive keys installed. I should note that my model of tree has a very unconventional and crappy mrthod of retention.
I tried 3 new different mfg pull studs, all the same..
I decided to check all my holders for gage length to where the stud tightens against. but not having a "gage" I could only check the relative to reach other.
so the all went into my shinty new technara tightening fixture. (this thing has a BEAUTIFULL ground bore that has great contact- i would trust it as a master taper gage for my purpose) and a dial indicator on the bottom.
I measured variance of about .020 across all my holders. avg being 75% within +/-.005
no surprise the chattering holder was the worst, a "flier" about +.010 from avg. so I faced off .015" so now it's one of the tighter holders.
Question is, what variation is "normal"
--- none of the holders look worn out. one of the worst was a brand new nikken.
how do i measure the actual gage length? drop a mic'ed bearing in the gage and measure to it's depth and derive mathiamatically?
I tried 3 new different mfg pull studs, all the same..
I decided to check all my holders for gage length to where the stud tightens against. but not having a "gage" I could only check the relative to reach other.
so the all went into my shinty new technara tightening fixture. (this thing has a BEAUTIFULL ground bore that has great contact- i would trust it as a master taper gage for my purpose) and a dial indicator on the bottom.
I measured variance of about .020 across all my holders. avg being 75% within +/-.005
no surprise the chattering holder was the worst, a "flier" about +.010 from avg. so I faced off .015" so now it's one of the tighter holders.
Question is, what variation is "normal"
--- none of the holders look worn out. one of the worst was a brand new nikken.
how do i measure the actual gage length? drop a mic'ed bearing in the gage and measure to it's depth and derive mathiamatically?