What is the reason for the square boring head that Criterion makes? What advantage does it have over the round Criterion boring head?
Jon Banquer San Diego, CA
Reason Criterion Square Boring Head Exists?
May 10, 2009
10 Replies
You mean other than range, bar holder positions and versatility?
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Put the two of them side by side, what's the difference? Item #4 is the hint, three set screws equals three tool positions.
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look at the tool
Turn the cutting edge 180° and what do you think can happen?
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(Not criterion but you should get the idea.)
You now have an OD Turning tool.
-- Tom
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How to make a Boring Head;
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The maker of the mentioned boring head has a website of a wide variety of very interesting tooling made for his(?) home shop machines.
Here's the english-version link
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Just be sure and use a rh boring tool or else the shank might come unscrewed from the head
You got it backwards. The head might come unscrewed from the shank.
Oop sorry bout that.
I think the reason they are still offered is some machinists think they are more rigid than the round ones.
Jon Banquer San Diego, CA
Sounds reasonable to me. A 3" square head has more sliding surface contact area than a 3" round head.
With only one boring bar hole instead of three I would guess this would also help.
Jon Banquer San Diego, CA
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