Clocks require oiling every 5 years and fully dismantling and servicing every 10 years or so. If this is not done dust and particles in the air combine with the oil in the oil sinks to form a very effective grinding paste. With the constant rotation of the wheels as the clock runs, this wears both the pivots and the holes in the plates in which they run.
What you can expect from me:
With all clocks or timepieces arriving in the workshop, the movements are thoroughly inspected. If a full service is required, the movements are completely dismantled. All parts of the movement are checked for damage and wear and the appropriate remedial action is taken consistent with the requirements of the customer and the current restoration and conservation practices. Mainsprings are removed and checked for damage or tears. Tears to the end of the mainspring can be repaired. However springs that are rusty or damaged are usually replaced. Parts that need making or repairing are restored or fabricated using approved techniques. All parts are cleaned appropriately. If parts are to be cleaned ultrasonically, only those commercial solvents not containing ammonia are used. The clock is re-assembled and oiled using the most modern synthetic oils, appropriate for the position of the wheels and lever in the clock. The movement is that set up and adjusted for beat and rate The invoice will contain details of the work undertaken for future reference.