Methods or machines for the manufacture of files or rasps

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Making files or rasps > Methods or machines for the manufacture of files or rasps

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• B23D 73/06 Cutting the working surfaces by means of chisels
• B23D 73/08 Milling, planing, slotting, knurling, or broaching the working surfaces
• B23D 73/10 Grinding the working surfaces
• B23D 73/12 Peculiar procedures for sharpening or otherwise treating the working surfaces (special treatment by sand-blast B24C1/02; sharpening files by etching C23F1/06)