Interpreting the term: Bushing a clock refers to the process of replacing or repairing the bushings, or insulating sections, within a clock mechanism to improve its functionality.
In the fascinating world of mechanical clocks, one common issue that arises over time is pivot wear. This article, the first in a two-part series, aims to shed light on this problem and provide guidance on how to identify and repair it.
Pivot wear can cause a gear to move away from the pinion and eventually stop when the gears no longer mesh properly. This issue is often due to worn pivot holes, especially when brass holes are worn by steel pivots. Such wear can lead to clock stoppage or slow running.
To identify pivot wear, begin by inspecting the pivots and pivot holes. Remove the clock dial and observe the gear train. Look for signs of wear such as oval-shaped holes, increased play, or rough gear movement. Bent pivots, debris, or excessive friction when turning gears manually may also be indicators of wear.
To examine pivots and holes more closely, use a pivot cleaning stick and a soft cloth to gently remove old dried oil, dirt, or deposits around the pivots. Avoid using Q-tips or abrasive materials to prevent causing further damage.
If pivot wear is minor, cleaning and lubrication might suffice. Apply a tiny drop of approved clock oil (either clock oil or high-quality synthetic) sparingly to each pivot hole to reduce friction and wear. However, over-oiling or using old gummy oil should be avoided as it can clog the pivots and worsen wear.
For more significant pivot wear where the pivot hole is enlarged, a professional repair such as installing a bushing (a small brass sleeve) into the pivot hole can restore proper fit and function. This process involves delicately filing or reaming the pivot hole to fit the bushing, then pressing or gluing the bushing in place before reassembling.
This repair is often necessary for vintage or antique clocks where pivot wear has developed over decades. It's important to note that the use of specific tools like the Bergeon Bushing Machine or watch or clock lathe may be required for this process.
In summary, identifying pivot wear involves visual/physical inspection for play or wear and cleaning pivots. Repair consists of careful cleaning and lubrication for minor issues or bushing installation for serious wear. Proper maintenance and avoiding overwinding or excessive oiling help prevent pivot wear.
Stay tuned for Part 2 of this series, where we delve deeper into the bushing installation process and provide further tips on maintaining your mechanical clock.
[1] Clock Repair Guide: Identifying and Repairing Pivot Wear [2] The Horology Blog: Pivot Wear and Bushing Installation [3] The Clockworks: Pivot Cleaning and Lubrication [4] The Time Doctor: Bushing Installation
Repairing vintage clocks can be a complex process, especially when dealing with pivot wear, a common issue in clock repair that affects the lifestyle of home-and-garden enthusiasts and technology hobbyists alike. When pivot wear occurs, it may lead to gear malfunctions, causing the clock to either stop or run sluggishly. Identifying pivot wear involves visual/physical inspection for play or wear and cleaning pivots, while repair may require bushing installation for significant wear or careful cleaning and lubrication for minor issues.
