Antique and Vintage Mechanical Clocks

Oiling your mechanical clock is an essential part of its maintenance, ensuring smooth operation and longevity. Proper lubrication reduces friction between moving parts, preventing wear and tear while keeping the movement running smoothly over time.

During the summer of 2016, my wife and I were traveling through the Muskoka area of the province of Ontario and stopped at a quaint village called Halliburton where we happened upon the only antique shop in town. There were a large number of clocks in the store that the proprietor had brought over from Ireland and each one was interesting.

Though there were plenty to choose from we settled on a Smiths Enfield Art Deco style oak cased mantel clock pictured below.

It was sold as-is and non-working, with the clerk noting that the pendulum bob was missing, which explained a lower price. However, when I got the clock home, I discovered the bob wrapped in brown paper along with the key, tucked inside the clock. After attaching the pendulum bob to the rod and a bit of adjustment, I found the correct beat, and the clock started running.

At my summer place, I do not have the necessary tools to service clocks but decided to take the movement out to oil it.

Once out of the case, I discovered that someone had oiled the movement by spraying it with an unknown lubricant. Spraying a clock with any lubricant is a bad practice. Indiscriminate oiling attracts dust and grime that will accelerate wear and eventually lead to stoppage.

Given the indiscriminate use of oil, there was no sense in operating the clock so I decided to put it aside until I got home where I could disassemble, clean, and properly service the movement.

Oiling Your Mechanical Clock

Lubrication is essential to the good running of any clock movement. Oiling a movement without first dissembling and cleaning it is normally a bad practice. The addition of new lubricant to old will mix with the dirt and grime to form a paste which acts as an abrasive that will hasten pivot and pivot hole wear.

The purpose of lubrication is to reduce wear, and applying the correct amount of oil is crucial. The only exception to this is when the oil sinks are dry— in such cases, oiling the movement without disassembling it is acceptable.

Apply only as much oil as required, a tiny drop goes a long way. Clock oil should occupy about one-half the capacity of the oil reservoir. Use an approved clock oil and a pin-type oiler to apply the oil.

Key Points Regarding Oiling

Lubricant: clock oil has the correct viscosity and has a low tendency to evaporate, spread or react adversely to various metals. Pivot oil is for pivots and spring oil is for springs; there is a difference! Clock suppliers such as Timesavers or Perrin will shave the correct oil for your clock. Do not uses household lubricants and especially WD 40 which is not a lubricant but a water dispersing agent. Synthetic oil is preferred since it retains its properties for a longer period but I work with mineral oil which is cheaper and just as effective.

When to oil: Some say that one should apply oil only after disassembling and cleaning. Others say that a clock’s service cycle might be an average of 5 years or more and oiling every two or three years without a thorough cleaning is acceptable. If there is a visible build-up of black, contaminated oily sludge in the pivot holes, a disassembly and thorough cleaning is necessary prior to oiling. A clock’s the environment will play a significant role since dusty, smoky environments contribute to accelerated wear. A sealed case will also keep out dust and lengthen the cycles between oiling.

How much oil: After oiling there should be a visible presence of oil in the oil sinks around the pivot holes. Oil running down the plates is to be avoided and is a indication that too much oil has been applied. I use a clock oiler with dispenser. Oil cup reservoirs are also very helpful as they prevent any foreign material from getting into the oil bottle when dipping with a pin type applicator. Long case clocks with larger pivot holes will require more oil than a small carriage clock.

What to oil: While looking at a clock plate (front or back) work from the top to the bottom. First and foremost are the pivot holes in the plate, then the points of contact between the pendulum and the crutch, escapement pallets faces and centre and motion works arbours. I generally do not apply lubricant to the mainsprings unless I have unwound them. Once out of the clock and assessed as to their condition and cleaned, I apply Keystone mainspring oil prior to re-installation. Do not oil the gear teeth.

This short primer on oiling your clock is not meant to be a definitive guide but will give you enough information to get you started if you have just found that mechanical clock you have always wanted.

In conclusion, a properly oiled clock, combined with regular servicing, is key to maintaining its functionality and extending its lifespan. Regular lubrication helps reduce friction between the moving parts, ensuring smooth operation and minimizing wear and tear. By performing periodic maintenance, such as cleaning and oiling, you can keep the clock running efficiently for many years, preserving both its accuracy and its value.

For more information on clock lubrication, I suggest the forum site at the National Association of Watch and Clock Collectors where you can find many expert opinions.