I think you need a very rigid lath to use the power feed on steel when parting, mileage may vary and all that.
Have you got an indicator. Put the mag base on the chuck, indicator in the parting tool and run the cross slide back and forth. You need to be within a thou or two for a parting tool or they start to rub.
rear tool post simple enough to make.
have you got a threaded chuck though or a taper? Like L1 or L0? Camlock?
What kind of holder is it? Hard to tell from the picture but can't see a clamping screw so I am wondering if it is just a push in insert?
Have you tried getting the parting tool harder up into the tool post with less hang out ?
Hi Guys
Any ideas please?
I think you need a very rigid lathe to use the power feed on steel when parting
It's a Sandvik one, like this https://static.grainger.com/rp/s/is/image/Grainger/44Y631_AS01
On a Chipmaster, with that tool and insert, you should have no problem at all. I have same the system from Greenwood Tools. It means it is your set-up or your technique that is causing the issue.
The performance degrades rapidly if the insert is worn or chipped. Put in a brand new insert, set exactly on centre and try again.
Can you give us the code off the insert box. Sandvik make a lot of different grades and the inserts come in left, neutral and right, so that may influence things.
I like that one, thanks for the tip.I usually put a spare holder in the toolpost and push it up against the tailstock ram.
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It's a Sandvik one, like this https://static.grainger.com/rp/s/is/image/Grainger/44Y631_AS01
It's a push in insert.
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" ....", Parting inserts normally should be set on centre and only occasionally will they require fractionally above.
Hi Hood,
Could you expand on what circumstances one might set the tool above centre, please ?
My learning curve remains only just off vertical
ATB,
Daniel
If your setup has any chance of dropping during cutting with the load such as a blade type parting tool with a large stick out or your X axis being a bit loose.
One blade type tool that I had great difficulty in getting to work was a Kennametal A2 it required that it was set fractionally above centre once I did that it worked well for the rest of the life of the blade.
Nope, the scariest thing you can do on a lathe is forget to put a G50 S*** in your code when using CSS and turning a large partYeah under load they can drop a little. I would never set up under centre myself.
Parting is the scariest thing you can do on a lathe in my opinion, it's scary when one goes bang.
In my case it's snap the lever on your tool post and plunge your hand into a spinning 6" ChuckNope, the scariest thing you can do on a lathe is forget to put a G50 S**** in your code when using CSS and turning a large part
I have never done that but lots of videos on Youtube of people who have
I always either have the spindle off when replacing tools or have the carriage well away from the chuck.In my case it's snap the lever on your tool post and plunge your hand into a spinning 6" Chuck
I was before.I always either have the spindle off when replacing tools or have the carriage well away from the chuck.
I bet you are the same now
Nope, the scariest thing you can do on a lathe is forget to put a G50 S*** in your code when using CSS and turning a large part
I have never done that but lots of videos on Youtube of people who have