Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 129

Braces are sold separately, or fitted with twelve, eighteen, twenty-four, thirty-six, or forty-eight bits, the bits being either bright, black, or straw-coloured, the last being the most expensive, but not necessarily better for use than the black, except that in bright bits any flaws are more easily detected. Bits, as a rule, do not require sharpening; if slightly notched they may be repaired with a sharp file. In boring with fine bits use a little grease, pull out the bit occasionally and remove the borings; if the bit gets fixed, take off the brace and pull out with pincers. All boring tools may be so much heated by use as to spoil their temper.