# Tool and Die Makers > Analyze specifications, lay out metal stock, set up and operate machine tools, and fit and assemble parts to make and repair dies, cutting tools, jigs, fixtures, gauges, and machinists' hand tools. - Code: 51-4111.00 (O*NET-SOC; SOC 2018 51-4111) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 17 tasks (15 core and 2 supplemental) - Page: https://foundation.org.ai/occupations/51-4111.00 - JSON: https://foundation.org.ai/data/tasks/51-4111.00.json ## What the work is made of 1. Verify dimensions, alignments, and clearances of finished parts for conformance to specifications, using measuring instruments such as calipers, gauge blocks, micrometers, or dial indicators. Core task · Task 8490 · Rated by 55 people who do the job, August 2021 2. Set up and operate conventional or computer numerically controlled machine tools such as lathes, milling machines, or grinders to cut, bore, grind, or otherwise shape parts to prescribed dimensions and finishes. Core task · Task 8492 · Rated by 54 people who do the job, August 2021 3. Visualize and compute dimensions, sizes, shapes, and tolerances of assemblies, based on specifications. Core task · Task 8491 · Rated by 55 people who do the job, August 2021 4. Study blueprints, sketches, models, or specifications to plan sequences of operations for fabricating tools, dies, or assemblies. Core task · Task 8489 · Rated by 55 people who do the job, August 2021 5. Fit and assemble parts to make, repair, or modify dies, jigs, gauges, and tools, using machine tools, hand tools, or welders. Core task · Task 23938 · Rated by 55 people who do the job, August 2021 6. Inspect finished dies for smoothness, contour conformity, and defects. Core task · Task 8496 · Rated by 55 people who do the job, August 2021 7. Select metals to be used from a range of metals and alloys, based on properties such as hardness or heat tolerance. Core task · Task 8502 · Rated by 55 people who do the job, August 2021 8. Lift, position, and secure machined parts on surface plates or worktables, using hoists, vises, v-blocks, or angle plates. Core task · Task 8498 · Rated by 55 people who do the job, August 2021 9. File, grind, shim, and adjust different parts to properly fit them together. Core task · Task 8493 · Rated by 54 people who do the job, August 2021 10. Smooth and polish flat and contoured surfaces of parts or tools, using scrapers, abrasive stones, files, emery cloths, or power grinders. Core task · Task 8497 · Rated by 54 people who do the job, August 2021 11. Measure, mark, and scribe metal or plastic stock to lay out machining, using instruments such as protractors, micrometers, scribes, or rulers. Core task · Task 8499 · Rated by 54 people who do the job, August 2021 12. Conduct test runs with completed tools or dies to ensure that parts meet specifications, making adjustments as necessary. Core task · Task 8495 · Rated by 55 people who do the job, August 2021 13. Design jigs, fixtures, and templates for use as work aids in the fabrication of parts or products. Core task · Task 8501 · Rated by 55 people who do the job, August 2021 14. Cut, shape, and trim blanks or blocks to specified lengths or shapes, using power saws, power shears, rules, and hand tools. Core task · Task 8500 · Rated by 55 people who do the job, August 2021 15. Set up and operate drill presses to drill and tap holes in parts for assembly. Core task · Task 8503 · Rated by 54 people who do the job, August 2021 16. Develop and design new tools and dies, using computer-aided design software. Supplemental task · Task 8504 · Rated by 54 people who do the job, August 2021 17. Set pyrometer controls of heat-treating furnaces and feed or place parts, tools, or assemblies into furnaces to harden. 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