Higgins909
Aluminum
- Joined
- Nov 19, 2018
Couldn't decide between here and CNC Machining for a sub-forum. I'm trying to figure out how to make sure a drill is centered and true on a 2 axis lathe, with a 12 tool turret, 5/6 are drill/boring bar holders. (All examples, just going to call it a Mazak Quick Turn 200, because it's not limited to this machine) The tool eye is messed up as far as I understand.
I kinda ramble a lot, but there is a TLDR at the end.
The main problem I see is for drills with a carbide insert tip and solid carbide drills. There are also issues with drills that are too big for the holders we have. We have some kind of drill collet holder. (is there a special name? I keep finding mill related tools) It's got a maximum collet size of .450~ or something. If we have a drill bigger then that, we have to "turn it down" which is a whole other deal of problems. What are these called and where can I find bigger ones? (So I can maybe suggest purchasing one) I think the biggest I found was a ER 20 or something like that. The carbide tipped drill has it's own holder with flats, to go into the turret spot for drills. I like to orientate drills so the flutes go straight to the other drill holder. I believe this would make on of the corners of the flute line up to the tool eye for measuring... If it worked. But other people don't seem to do this and I think it causes issues or the collet was dirty.
The solid carbide drill is always in the collet holder, which is in a adapter, and then in the turret. This is supposed to be a + or - .002" hole and it's always nearly out of tolerance, Maybe even one side of the hole is bigger than the other. They also always chip right away, but we have to keep using them... A co-worker has me kinda scared when using carbide. Just about how it will explode if it's off center or vibrates too much. I don't want to be the one to break the $500 tool... I've tried looking up how to make sure they're centered and find videos about manual lathes and a tailstop style drill. There is a X 0 written on the side of the machine. I have no idea how accurate it is. One time I was trying to indicate the base of the carbide tipped drill's holder and it essentially told me it was off in the rotation of the turret. As that was the method I was told for checking drills by someone. I think that would be Y axis if it was a active tooling lathe?
TLDR, How do you make sure a drill is running true and center on a lathe?
Thanks,
Higgins909
I kinda ramble a lot, but there is a TLDR at the end.
The main problem I see is for drills with a carbide insert tip and solid carbide drills. There are also issues with drills that are too big for the holders we have. We have some kind of drill collet holder. (is there a special name? I keep finding mill related tools) It's got a maximum collet size of .450~ or something. If we have a drill bigger then that, we have to "turn it down" which is a whole other deal of problems. What are these called and where can I find bigger ones? (So I can maybe suggest purchasing one) I think the biggest I found was a ER 20 or something like that. The carbide tipped drill has it's own holder with flats, to go into the turret spot for drills. I like to orientate drills so the flutes go straight to the other drill holder. I believe this would make on of the corners of the flute line up to the tool eye for measuring... If it worked. But other people don't seem to do this and I think it causes issues or the collet was dirty.
The solid carbide drill is always in the collet holder, which is in a adapter, and then in the turret. This is supposed to be a + or - .002" hole and it's always nearly out of tolerance, Maybe even one side of the hole is bigger than the other. They also always chip right away, but we have to keep using them... A co-worker has me kinda scared when using carbide. Just about how it will explode if it's off center or vibrates too much. I don't want to be the one to break the $500 tool... I've tried looking up how to make sure they're centered and find videos about manual lathes and a tailstop style drill. There is a X 0 written on the side of the machine. I have no idea how accurate it is. One time I was trying to indicate the base of the carbide tipped drill's holder and it essentially told me it was off in the rotation of the turret. As that was the method I was told for checking drills by someone. I think that would be Y axis if it was a active tooling lathe?
TLDR, How do you make sure a drill is running true and center on a lathe?
Thanks,
Higgins909