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  • #16
    Originally posted by Rich Carlstedt View Post
    Are they TPMG or TNMG ?
    Neither. All the inserts that are visible are TPGs. If they were TNMGs or TPMGs they would have
    a centre hole...

    Keith
    __________________________
    Just one project too many--that's what finally got him...

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    • #17
      Originally posted by Tundra Twin Track View Post
      I have Milled the bottom of larger holders to get desired height,seems to work fine.
      That is a good way to use inexpensive holders for our smaller lathes. Great idea. JR

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      • #18
        The writing on the box at the front says TNMG, it must be a red herring..

        The Smart & Brown has a tool height of 17.53mm and I have milled down about two dozen 20mm tools to avoid bothering with shims, (only about 1/5 of them turned out low). There is now a choice of three toolposts, all the same height as the original. If the lathe had a QCTP, I probably would not have needed to, but the thought of the cost of 24 holders, plus those for boring bars, parting off , grooving and threading tools would put me off.

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        • #19
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ID:	1917281 Thanks for all the replies. They are indeed 1/4” IC. Some of the gold inserts have 0 rake some have some rake. All the gray ones have rake. Here’s a couple pictures of the inserts and my mill and lathe. I have a rotary table. I also use A R Warner HHS inserts and holders on my QCTP. I was toying with the idea of drilling and tapping a hole for a hold down as the HSS inserts are the same size as the free carbide ones. I also thought about buying a cheap set of insert holders for triangular inserts with center holes and modifying them some how.
          Sole proprietor of Acme Buggy Whips Ltd.
          Specialty products for beating dead horses.

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