# Grinding, Lapping, Polishing, and Buffing Machine Tool Setters, Operators, and Tenders, Metal and Plastic > Set up, operate, or tend grinding and related tools that remove excess material or burrs from surfaces, sharpen edges or corners, or buff, hone, or polish metal or plastic work pieces. - Code: 51-4033.00 (O*NET-SOC; SOC 2018 51-4033) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 18 tasks (13 core and 5 supplemental) - Page: https://foundation.org.ai/occupations/51-4033.00 - JSON: https://foundation.org.ai/data/tasks/51-4033.00.json ## What the work is made of 1. Inspect or measure finished workpieces to determine conformance to specifications, using measuring instruments, such as gauges or micrometers. Core task · Task 10140 · Rated by 83 people who do the job, July 2016 2. Measure workpieces and lay out work, using precision measuring devices. Core task · Task 10145 · Rated by 83 people who do the job, July 2016 3. Observe machine operations to detect any problems, making necessary adjustments to correct problems. Core task · Task 10143 · Rated by 83 people who do the job, July 2016 4. Move machine controls to index workpieces, and to adjust machines for pre-selected operational settings. Core task · Task 10150 · Rated by 83 people who do the job, July 2016 5. Study blueprints, work orders, or machining instructions to determine product specifications, tool requirements, and operational sequences. Core task · Task 10147 · Rated by 83 people who do the job, July 2016 6. Select machine tooling to be used, using knowledge of machine and production requirements. Core task · Task 10146 · Rated by 83 people who do the job, July 2016 7. Mount and position tools in machine chucks, spindles, or other tool holding devices, using hand tools. Core task · Task 10148 · Rated by 83 people who do the job, July 2016 8. Activate machine start-up switches to grind, lap, hone, debar, shear, or cut workpieces, according to specifications. Core task · Task 10149 · Rated by 83 people who do the job, July 2016 9. Set up, operate, or tend grinding and related tools that remove excess material or burrs from surfaces, sharpen edges or corners, or buff, hone, or polish metal or plastic workpieces. Core task · Task 10142 · Rated by 82 people who do the job, July 2016 10. Set and adjust machine controls according to product specifications, using knowledge of machine operation. Core task · Task 10144 · Rated by 83 people who do the job, July 2016 11. Brush or spray lubricating compounds on workpieces, or turn valve handles and direct flow of coolant against tools and workpieces. Core task · Task 10151 · Rated by 83 people who do the job, July 2016 12. Lift and position workpieces, manually or with hoists, and secure them in hoppers or on machine tables, faceplates, or chucks, using clamps. Core task · Task 10141 · Rated by 83 people who do the job, July 2016 13. Repair or replace machine parts, using hand tools, or notify engineering personnel when corrective action is required. Core task · Task 10156 · Rated by 83 people who do the job, July 2016 14. Compute machine indexings and settings for specified dimensions and base reference points. Supplemental task · Task 10152 · Rated by 83 people who do the job, July 2016 15. Maintain stocks of machine parts and machining tools. Supplemental task · Task 10157 · Rated by 83 people who do the job, July 2016 16. Thread and hand-feed materials through machine cutters or abraders. Supplemental task · Task 10154 · Rated by 82 people who do the job, July 2016 17. Adjust air cylinders and setting stops to set traverse lengths and feed arm strokes. Supplemental task · Task 10155 · Rated by 81 people who do the job, July 2016 18. Slide spacers between buffs on spindles to set spacing. 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