Standards & Practices



Wheel pivot being burnished.

Sound repair and restoration practices always produce predictable outcomes surpassing the customer’s highest quality expectations.  Although different types of clocks require different specific practices, metals, chemicals, temperatures and equipment, all clock repairs follow this general repair and restoration methodology:

  1. Inspection for operation and determination of needs.
  2. Clean using appropriate techniques and chemicals (e.g., ammonia solutions are never used on lacquered brass plates).
  3. Photograph, prepare drawings, make repair notes and completely disassemble movement.
  4. Inspect and repair of pivots, holes, teeth, wheels, pinions/trundles/leaves, arbors, springs,  levers and operational components such as rack, quarter cams, etc.
  5. Seriously worn, broken or missing parts are replaced.  As required, the replacement part is bought and fitted, harvested from an ‘inventory clock’ or made.  Any pivots, bushings, wheels, springs or other part to be fabricated will be made using hand tools, metal lathes, mills, drills, grinders and specialty horological equipment following proper safety and use standards.
  6. Clean all repaired components mechanically and by hand, using proper chemicals and processes for each specific clock and part.

    Group shot of customer clock for identification.

  7. Count wheel teeth, pinion leaves, and trundles; then make barrel measurements to determine the correct rate, correct mainspring size, winding turns and pendulum length.
  8. Assemble movement and set up chimes and striking mechanisms when present.
  9. Lubricate with oil or grease as appropriate for the part.
  10. Test to ensure proper rate, beat error, strike sequence, chime/melody sequences, run time and time/strike/melody synchronization, and autocorrection using computer technology and manual practices as appropriate.
  11. Photograph and maintain data base of clock repair details for future service by Woodstock Clocks Company or to supply information to the future clockmaker of your choosing, should you relocate.