Made from a file to sharpen used, this tool helps in regulating clearance valves. Only warmed and chip away to afford the desired shape.
Paul... With a blowtorch heat it until the redness point, fixed in a bench vise I change to the way I want, and Cools quickly in engine oil.
In case files to sharpen more thick (eg: Rasp) can be made tools to cut wood on the lathe. an infinity of models.
In the case of cutting tools (Wood) normalizing with better low temperature, have found translation (revenimento) to warm to straw color and cool.
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