[Jewelry making - Article 01389] - Re: [Orchid] CNC Cutting

[Jeffrey Everett]

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>              stay away from carbide tooling and stick with High Speed
>     Steel. snip...Ok, so in wax the flex is no big deal, but why spend
>     more money on carbide or cobalt tooling when HSS is all you need. 

    Hey Neil, hope you had a nice Thanksgiving. 

    You forgot to mention one thing in regards to HSS vs. carbide. HSS
    can be ground to a finer, sharper edge. 

    I do use HSS for wax and fusible alloys, but I stick to carbide for
    fine detail in brass or aluminum molds. A tip-off of .1 mm at an
    angle of 7° just isn't strong enough with HSS, yet I have super micro
    grain carbide pyramidal cutters that have only needed periodic
    resharpening. Maybe it's just my lack of skill but I have to use
    carbide cutters for engraving steel stamps, HSS just snaps. 

    I once ground a special purpose (wax cutting) parallel 3 flute
    cutter with a cross section of .25 mm and 6 mm length that in carbide
    that only broke over a year later because of a programming mistake.
    The same cutter proved impossible to grind in HSS. 

Jeffrey Everett


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