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Details for Timing Device Assemblers, Adjusters, and Calibrators


Perform precision assembling or adjusting, within narrow tolerances, of timing devices, such as watches, clocks, or chronometers.


  • Turn wheels of calipers and examine springs, using loupes, to determine if center coils appear as perfect circles.
  • Adjust sizes or positioning of timepiece parts to achieve specified fit or function, using calipers, fixtures, and loupes.
  • Assemble and install components of timepieces to complete mechanisms, using watchmakers' tools and loupes.
  • Bend parts, such as hairsprings, pallets, barrel covers, and bridges, to correct deficiencies in truing or endshake, using tweezers.
  • Clean and lubricate timepiece parts and assemblies, using solvents, buff sticks, and oil.
  • Disassemble timepieces such as watches, clocks, and chronometers so that repairs can be made.
  • Examine components of timepieces such as watches, clocks, or chronometers for defects, using loupes or microscopes.
  • Mount hairsprings and balance wheel assemblies between jaws of truing calipers.
  • Observe operation of timepiece parts and subassemblies to determine accuracy of movement, and to diagnose causes of defects.
  • Replace specified parts to repair malfunctioning timepieces, using watchmakers' tools, loupes, and holding fixtures.
  • Review blueprints, sketches, or work orders to gather information about tasks to be completed.
  • Test operation and fit of timepiece parts and subassemblies, using electronic testing equipment, tweezers, watchmakers' tools, and loupes.
  • Bend inner coils of springs away from or toward collets, using tweezers, in order to locate centers of collets in centers of springs, and to correct errors resulting from faulty colleting of coils.
  • Change timing weights on balance wheels to correct deficient timing.
  • Estimate spaces between collets and first inner coils in order to determine if spaces are within acceptable limits.
  • Examine and adjust hairspring assemblies to ensure horizontal and circular alignment of hairsprings, using calipers, loupes, and watchmakers' tools.
  • Tighten or replace loose jewels, using watchmakers' tools.


  • Realistic - Realistic occupations frequently involve work activities that include practical, hands-on problems and solutions. They often deal with plants, animals, and real-world materials like wood, tools, and machinery. Many of the occupations require working outside, and do not involve a lot of paperwork or working closely with others.

Education, Training, Experience

  • Education - These occupations usually require a high school diploma.
  • Training - Employees in these occupations need anywhere from a few months to one year of working with experienced employees. A recognized apprenticeship program may be associated with these occupations.
  • Experience - Some previous work-related skill, knowledge, or experience is usually needed. For example, a teller would benefit from experience working directly with the public.


  • Mathematics - Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.
  • Education and Training - Knowledge of principles and methods for curriculum and training design, teaching and instruction for individuals and groups, and the measurement of training effects.
  • Production and Processing - Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods.
  • Engineering and Technology - Knowledge of the practical application of engineering science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various goods and services.
  • Mechanical - Knowledge of machines and tools, including their designs, uses, repair, and maintenance.


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