This Hermle rebuild service is for the 340-020 Westminster Chime movement.
This is a rebuild service for you to send me your clock movement to be rebuilt and then returned to you.
Qualifying movements include; 340-020
Hermle made Seth Thomas movements; 208-013, 401-003, 401-004, 401-005, 450-009, 497-212.
If you don't see your movement number listed send me an email for a quote.
Return Shipping Is $13.88 For This Type Of Movement.
The listed price of $128.88 includes the following:
Cleaning and oiling the clock movement.
Cleaning and oiling the springs.
Any bushings the clock movement needs.
Regulating the clock movement to keep good time.
One year warranty on parts and labor.
If you have any unusual damage such as stripped teeth, broken pivots, excessive rust, or damage to the balance wheel assemble, etc., please contact me before purchasing this service.
The average turn around time is 60 days or less.
How a Clock Movement Wears.
This Hermle Clock Movement is made up of two brass plates with 3 springs and 15 gears between them. Each gear shaft has two pivots at either end that ride in a hole in each of the plates. As the mechanism runs, the pressure from the spring turns the first gear in one direction, that gear turns the next gear in the opposite direction, and so on. Which ever direction the pressure presses the gear to run, the pivot holes in the plates will wear in that direction. The more the holes wear, the more the gears drag as they move out of alignment, and the more power the movement needs to continue running. Eventually the movement wears to the point that the spring cannot supply enough power to run the clock. At this point the movement will need to be rebuilt.
How the Clock Movement is Rebuilt.
First the clock movement is completely disassembled. All the worn pivot holes are realigned and then drilled out to the proper size of the bushing it is to receive. The bushing is then pressed into the hole and touched up with a bushing reamer as needed to provide adequate clearance for the pivot. (I use only high quality KMW bronze bushings) The springs are removed from the barrels, stretched while being scrubbed clean, and new spring oil applied. (Any spring that does not pass inspection will be replace with another good used spring) The movement is then cleaned and oiled, reassembled, and thoroughly tested. All rebuild movements come with a one year warranty.