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J & M Diamond are fabricators and manufacturers of PCD and CBN tooling. Any special insert can be made to your specifications to cut hard metals up to 68rc, or highly abrasive, non-ferrous materials. Call us with your needs for a fast quote.

Sumitomo wrote the book on hard turning with ceramic inserts for materials from 45rc to 55 rc, or CBN inserts to machine hard metals up to 68rc. Sumitomo's CBN inserts will easily lathe turn materials in one-third the time that you would take to grind them. Severely interrupted cuts and hard materials are no problem either! If you have a hard metal to turn, Sumitomo has the insert grade to do the job. Call us and we will specify which insert will work best for you.


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