# Timing Device Assemblers and Adjusters > Perform precision assembling or adjusting, within narrow tolerances, of timing devices such as digital clocks or timing devices with electrical or electronic components. - Code: 51-2061.00 (O*NET-SOC; SOC 2018 51-2061) - Family: [Production](https://foundation.org.ai/occupations#family-51), one of its 114 occupations - Tasks: 17 tasks (8 core and 9 supplemental) - Page: https://foundation.org.ai/occupations/51-2061.00 - JSON: https://foundation.org.ai/data/tasks/51-2061.00.json ## What the work is made of 1. Assemble and install components of timepieces to complete mechanisms, using watchmakers' tools and loupes. Core task · Task 15003 · Rated by 53 people who do the job, June 2008 2. Observe operation of timepiece parts and subassemblies to determine accuracy of movement, and to diagnose causes of defects. Core task · Task 15004 · Rated by 54 people who do the job, June 2008 3. Test operation and fit of timepiece parts and subassemblies, using electronic testing equipment, tweezers, watchmakers' tools, and loupes. Core task · Task 15005 · Rated by 53 people who do the job, June 2008 4. Replace specified parts to repair malfunctioning timepieces, using watchmakers' tools, loupes, and holding fixtures. Core task · Task 15006 · Rated by 54 people who do the job, June 2008 5. Disassemble timepieces such as watches, clocks, and chronometers so that repairs can be made. Core task · Task 15007 · Rated by 53 people who do the job, June 2008 6. Clean and lubricate timepiece parts and assemblies, using solvents, buff sticks, and oil. Core task · Task 15008 · Rated by 54 people who do the job, June 2008 7. Examine components of timepieces such as watches, clocks, or chronometers for defects, using loupes or microscopes. Core task · Task 15009 · Rated by 53 people who do the job, June 2008 8. Bend parts, such as hairsprings, pallets, barrel covers, and bridges, to correct deficiencies in truing or endshake, using tweezers. Core task · Task 15010 · Rated by 52 people who do the job, June 2008 9. Change timing weights on balance wheels to correct deficient timing. Supplemental task · Task 15011 · Rated by 53 people who do the job, June 2008 10. Adjust sizes or positioning of timepiece parts to achieve specified fit or function, using calipers, fixtures, and loupes. Supplemental task · Task 15012 · Rated by 52 people who do the job, June 2008 11. Mount hairsprings and balance wheel assemblies between jaws of truing calipers. Supplemental task · Task 15013 · Rated by 51 people who do the job, June 2008 12. Estimate spaces between collets and first inner coils to determine if spaces are within acceptable limits. Supplemental task · Task 15014 · Rated by 50 people who do the job, June 2008 13. Bend inner coils of springs away from or toward collets, using tweezers, to locate centers of collets in centers of springs, and to correct errors resulting from faulty colleting of coils. Supplemental task · Task 15015 · Rated by 50 people who do the job, June 2008 14. Turn wheels of calipers and examine springs, using loupes, to determine if center coils appear as perfect circles. Supplemental task · Task 15016 · Rated by 50 people who do the job, June 2008 15. Examine and adjust hairspring assemblies to ensure horizontal and circular alignment of hairsprings, using calipers, loupes, and watchmakers' tools. Supplemental task · Task 15017 · Rated by 52 people who do the job, June 2008 16. Review blueprints, sketches, or work orders to gather information about tasks to be completed. Supplemental task · Task 15018 · Rated by 53 people who do the job, June 2008 17. Tighten or replace loose jewels, using watchmakers' tools. 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