A diamond toolholder toolholder

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This relates to the "diamond toolholder" as advertised in Home Shop
Machinist. It has nothing to do with crystalline carbon.
Reply to
Don Foreman
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Thanx for the review, Don. I have been considering one of the "diamond" tool holders for my Sherline.
Bob Swinney
Reply to
Robert Swinney
I think you'd like it. It cuts with very little force, which is good on a small lathe. The included jig makes it very easy to grind the tool properly on a bench grinder. You can knock a small radius (.032 or so) on the front corner of the toolbit with a hone to achieve a very acceptable finish on aluminum, brass, mild steel, SS and delrin (plastic). If you do that for about 1/4" of the length, then you get many regrinds without having to re-radius.
Reply to
Don Foreman
And what do you use the diamond-tool for? I only use that shape for free-hand turning (holding the tool by hand, with a long lever).
Nick
Reply to
Nick Mueller
I use it for turning and facing aluminum, brass, delryn, mild steel, drillrod and 303 stainless.
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A professional or production machinist might prefer carbide tooling for speed and longevity between regrinds or replacement of inserts. I prefer HSS in my home shop because it takes a sharper edge so is able to take "skin" cuts of .001" even in SS. I'm not in any hurry. Also, 1/4" HSS and cobalt bits are very inexpensive and easy to grind.
I do use carbide on cast iron, abrasive stuff like glass-filled Noryl, and on hard stuff like truck axles and nastier SS alloys.
Reply to
Don Foreman
Ah! Thanks. Grinding position is almost working position.
The shape for freehand turning I meant looks the same, but the long axis is horizontal. :-)
Me too. Using carbide less than once.
Nick
Reply to
Nick Mueller
On your page: "Only problem with it is that it wants to be positioned at a 12 degree angle WRT the Y axis of the lathe. That's inconvenient because then I must rotate the toolpost every time I change from turning/facing to parting, grooving or threading -- and again to change back"
Is there a reason that the basic toolholder couldn't have the additional 12 degrees built into it? Is the 12 degrees something specific to your setup?
Bob
Reply to
Bob Engelhardt
Nicely done, Don!
I made my own tangential tool holder a few years back on my Myford. It's not pretty but it works very well.
I got the hots to make a copy of the Tripan toolpost for my lathe. Other than setting up to cut a couple dovetails at angles to each other, it looks good to me. Lord knows I'll never buy one new. $$$
Cheers Trevor Jones
Reply to
Trevor Jones
I built one to see how it worked last summer for the experience. See my pages on Earthlink home.earthlink.net/~lhartswick/ Just a bunch of pix, on fancy stuff. :-) ...lew...
Reply to
Lew Hartswick

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