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Spiral Flute Drill |
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Harden material to be cut as
stainless steel, cast iron and
others. |
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For work piece without hole or
deep-hole drilling and bottom
stop. |
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Easier the chip flow out follow
the spiral flute. |
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Burnishing Drill |
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Better hole finishing with extra
2-margin. |
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For work piece as Aluminum
casting. |
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Better hole concentricity with
a straighter and less
oversized hole. |
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