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Thread: Parting off question
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16th Sep 2020, 04:59 PM #1
Parting off question
Is there a way to make the stub be on the material that still in the chuck and not have the stub on the part that you've just parted off?
Regardless of any changes I make in my parting off tool, the stub is always on the parted off piece.
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16th Sep 2020, 05:00 PM #2Golden Member
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Parting off question
I have an angle on my HSS tool so it’s fractionally longer on the tailstock side. Always leaves the nub on the chuck piece.
https://encrypted-tbn0.gstatic.com/i...8nN8w&usqp=CAU
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16th Sep 2020, 05:09 PM #3
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16th Sep 2020, 06:40 PM #4Gear expert in training
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16th Sep 2020, 07:13 PM #5
Hi Jim, Guys,
I use a 2 mm thick parting blade, I normally try to grind the cutting edge dead parallel, or if I want to reduce any pip on the work, raise, or in my case lower, the blade a couple of thou above centre. Then the blade will shave it off. It seems that people set their parting blade a fraction low, though I don't advocate setting it high as some do.
EDIT: I use a HSS blade.Best Regards:
Baron J.
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16th Sep 2020, 08:59 PM #6Most Valued Member
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16th Sep 2020, 11:05 PM #7Diamond Member
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I can't give the link at the moment, for some reason I can only get the Russian version of aliexpress.
I have bought from my usual aliexpress tooling supplier straight and RH 3mm parting inserts, they also list a LH parting insert.
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17th Sep 2020, 05:57 PM #8
Hi Chris, Guys,
Yes it can ! Thin, in my case 2 mm thick HSS blades and deep cuts. Basically too much stick out. Also if the blade is not dead square to the work you will get run off even with a square end on the blade. If the blade is slightly canted it will run off as well.Best Regards:
Baron J.
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17th Sep 2020, 05:58 PM #9Golden Member
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Interesting. Might dial my angle back to parallel. Probably explains why I struggle with parting off large diameter stock.
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17th Sep 2020, 07:02 PM #10
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17th Sep 2020, 07:53 PM #11Golden Member
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Parting off question
That’s the plan, pity I’m making reduction drive parts for the bandsaw
I’m not a fan of parting off, I’m fine with small stuff but my 9” Hercus struggles with 40mm plus steel. I have enough horsepower, Im just not very good at it. Might try some inserts to see if that improves things.
It’s annoying to have to part something off because it’s too big to put in the lathe. That’s where I feel a bandsaw will make all the difference.
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