jim r
Cast Iron
- Joined
- Aug 11, 2002
- Location
- Sinton, TX.
I have a new to me Miyano TSV 35 mill. No tool holders came with it. The manuals call for the P30T-2 retention knobs as it dose for the other TSV35 and TSV33 that I have. These other two machines work fine with these 30 degree knobs as the manufacture calls them, but the industry calls them 60 degree. The issue is when the tool holder is pulled from the spindle at tool change. A few times it has been violent enough to pop the holder out of the tool hands grip, and error the machine. More often the snap will just error the machine. Most often it is just an uncomfortable snap. I have measured the studs and they are within tolerances. Have run the same tool holders through all 12 of the tool positions. Have run a dozen plus different tool holders in this testing. I adjusted the tool knock out point, which was only .007 out of the tolerance zone. I can even see the taper release before the stud release so it is not the tool holder taper sticking.
There is no consistency with it. Running the same tool holder through a tool change over and over can give different results on each pull. Even coating the stud in more oil then it would normally see, it had only little effect. Being now, days into this mess I tried something most say not to. I put in a tool with a P30T-1 retention knob. These have the same dimensions except they have a 45 degree angle to them. The outcome? As soothe as silk. Of course I tried many more of the 45 degree studs in old and new tool holders and all change perfect.
So now I'll start with two questions:
Is there something vary wrong with the pull stud collet and guide?
Or did someone in the past maybe change out the pull stud collet and guide with the wrong parts?
There is no consistency with it. Running the same tool holder through a tool change over and over can give different results on each pull. Even coating the stud in more oil then it would normally see, it had only little effect. Being now, days into this mess I tried something most say not to. I put in a tool with a P30T-1 retention knob. These have the same dimensions except they have a 45 degree angle to them. The outcome? As soothe as silk. Of course I tried many more of the 45 degree studs in old and new tool holders and all change perfect.
So now I'll start with two questions:
Is there something vary wrong with the pull stud collet and guide?
Or did someone in the past maybe change out the pull stud collet and guide with the wrong parts?