[Jewelry making - Article 00042] - Re: [Orchid] High speed spindle

[Neil George]

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    A 10 degree cutter with a perfect point, and a perfect point having a
    zero measureable value has no bearing what so ever on spindle speed.
    Why?, because a point has no rotational value. Therefore at 500 RPM
    or 20,000 RPM the same effect is applied to the tip and that is
    without a rotational value, it is therefore being "dragged" through
    the material and has no cutting effect on the part. The cutting edge
    starts as you move away from the tip and up the tool. However as you
    move up the tool and lets say you move up the tool by.25 mm, the tool
    diameter is still only 0.0437mm / 0.00172", therefore, what kind of
    chip load would you have at this diameter?. With barely a cutting
    edge, and an edge that has no chip clearing capacity, it is in
    reality an extremelly inaffective way to remove material. Add no
    cutting capacity but merely dragging and rubbing on the part, to the
    10 degree draft on the tool causing downward pressure on the material
    you are trying to clear, results in packing what should be nice
    detailed machined areas back with material. 

Best Regards.
Neil George
954-495-8224
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