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How to adjust wall clock speed.
Pendulum clocks with a time adjustment arbor french and american mantel clocks the time adjustment arbor is a square shaft that is much smaller than the winding arbors.
Mechanical clocks are inherently inaccurate and therefore cannot be compared to electronic clocks.
How to adjust an antique clock.
To speed up the clock tighten the nut turn it toward your right.
People have to keep in mind that antique clocks are often hundreds of years old.
It is relatively easy to adjust the pendulum on a clock if follow some simple instructions.
Each antique clock was made by hand without using electric tools and without the aid of computerized machines.
On clocks with a pendulum move the pendulum disk up to speed up the clock or down to slow it.
On clocks without a pendulum just move the time adjustment lever.
Turn it to the right to move the disk up and to the left to lower it.
Use the adjustment nut.
Use the following rules to adjust the pendulum nut.
If you do this and keep a record of how much it is turned each week you should be able to adjust the clock s accuracy to within a minute or two a week.
The bob will rise making the effective length of the pendulum shorter and the clock faster.