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Boring heads

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Ron Laden02/11/2018 13:06:07
2005 forum posts
400 photos
Posted by JasonB on 02/11/2018 12:38:03:
Posted by Neil Wyatt on 01/11/2018 20:48:59:
Posted by JasonB on 01/11/2018 12:19:47:

looks like it will just clear but not sure what the finish will be like as it is slightly negative rake

Isn't the rake angle of the vertical edge more important?

Yes as the cut is downwards not outwards but as the unground edges meet at something like 87degrees by the time the flat face has been tilted up to clear the bottom of the cut you are close to or into negative rake. I you take the longer yellow line to be the bottom of the cut, the tool will need rotating anticlockwise so the flat face of the carbide does not rub so then the shorter line will become vertical or past vertical and into negative top take.


Edited By JasonB on 02/11/2018 12:38:48

Yep I did do that, rotate the tool to so the flat face cleared the cut. I was unable to grind the rake (no green wheel) but fortunately the tool cut nicely.

Martin Shaw 102/11/2018 14:14:18
118 forum posts
37 photos
Posted by Ron Laden on 02/11/2018 10:15:37:
Posted by Martin Shaw 1 on 01/11/2018 21:23:22:

Hi Ron

That's pretty impressive, I'm not at all certain I would have undertaken that, but it has undoubtedly worked well. Some food for thought here.


Thanks guys.

Martin, if I managed it on your ex SX2 then with your new SX2.7 you should have no problem, it was a SX2.7 that Jason did a trial for me using the same ARC boring head that I used.

Bet your just a bit excited with your new machine on its way shortly.


I certainly am Ron, I'll post a pic in due course when I've managed it into its home.


Ron Laden04/11/2018 14:02:36
2005 forum posts
400 photos

Got a green wheel on the way so may have a go at reshaping one or two of the boring tools and using them inverted. It seemed to work ok with the 100mm hole I bored and that tool was as supplied, so with a bit of work may be able to get two or three usable tools out of the set for any side mounted boring.

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