ID milling tools?

JPower6210

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Dec 11, 2011
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Hey all- I just bought a lot of milling cutters on eBay- included were a couple of things that I am not sure what they are- can someone help ID?

The first are two marked West Coast Diamond Tool Co.- they look to have a piece of diamond embedded in the tip- engraving tools?

The second doesn't have any markings- Thanks for any ideas- it's fun to try and figure this stuff out, but I

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The second item is a diamond dresser. Used to dress matrix grinding wheels. It is held in some type of fixture.
 
The triangular item is a "Hardsteel Drill", made for drilling hard steel, I have some of them, but have never had to use them; Google the name.
 
I use them without any holder. A very light touch on your grinder stone and you will see what it does.
 
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