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Wooden screw samples No 1-4
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No.1 - Cutter in as-found condition. Off-the shelf dry birch dowelling, not rounded. V at minor diameter is a sharp, but rough corner. Magnification shows tearing there.
No.2 - Cutter as-found. Off-the shelf dry maple dowelling, not rounded. No change in condition at minor diameter.
No.3 - Cutter honed, hook removed & out-cannel formed. Less tearing in the rounded bottom of the V.
No.4 - No change from No.3
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2012_0016s.jpg
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2012_0000cs.jpg
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2012_0002cs.jpg
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2012_0003cs.jpg
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2012_0004cs.jpg
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