Quote Originally Posted by Cdronbrn View Post
I worked for the large American aircraft company on the Pacific Northwest for many years. Don’t know if you knew or was interested but thought I would show you what these countersinks were made to work with. If you already know - sorry. But if not, here you go…Click image for larger version. 

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I have maybe a couple dozen or more of these countersink cutters all had been reground before I got them some in 22.5° some in 37°, 45° and 1 in 65° at least 6 different diameters and 4 different thread sizes.
I had not seen those micro stop holders but apparently that company only offers a limited selection of tooling specific for their target market.
Thanks for the info though.
I used to own a wide selection of cavity forming tools ranging from SAE #2 through SAE#32 single cavities for o ring boss fittings or poppets, through 5 stage cavities for poppet and spool type cartridge valves Not every configuration obviously, and our tooling grinding department often would make our own for us.