The duties of a cutter grinder are to operate a cutter grinder tool, which mechanics use to sharpen or cut metal to precise specifications. In small fabrication shops, you may work with a traditional machine that does not require computer programming. However, if you work at a large or more modern fabrication shop, you typically use equipment like a CNC machine, which needs to be programmed. As a cutter grinder operator, your responsibilities are to review blueprints and other detailed schematics to ensure that you cut or sharpen materials or tools to the exact specifications required.