Mike

CALLIHAN is a mechanical engineer and woodworker who makes and restores hand tools in Wisconsin.

Slow cooling. After annealing the metal, bury the blade in dry sand to cool it very slowly.

Quenching to harden. After reheating the tool to a cherry-red color, quench it by stirring it in oil. This rehardens the end of the tool.

Tempering. To toughen the metal and make it less brittle, temper it by heating it very slowly until it turns straw-yellow.

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A Course In Wood Turning

A Course In Wood Turning

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