The Parts to a Pendulum

Usually there are three components to a clock pendulum assembly. The pendulum, leader and suspension spring. The suspension spring is the very top part that wig wags back and forth and the leader is attached to it. The leader is the part that hangs on the suspension, and the pendulum hangs on the bottom of the leader. To get the proper replacement part is not always simple to figure out, if you have the old parts it is much easier to match up.

Replacing Lost Parts

If the parts are lost then its some what tricky, you would need to review the products and instructions below to figure out the proper pendulum part. If you are unable to determine the correct part from below, then you may want to email us the movement numbers off of the back plate and email a picture if able to. The email address is clockworks@clockworks.com and we can let you know what unit is best.

Clock Suspension Spring

Suspension Springs

NOTE: Suspensions do not have to be exact in length, if the clock runs slow then raise the pendulum bob with the screw at the bottom of the pendulum rating nut threads. If the clock is running fast then turn the nut as too lower the pendulum bob. The suspensions in the picture are not actual size, you will need to measure your broken suspension spring the best you can and select the closest size in the drop down list by the order button below.

Clock Pendulum Top Hook

Long Suspensions

Style A and B are for antique tall case clock movements. Suspension C is the most popular as it covers many antique and antique replica wall and mantle clock movements. Please note style C comes as a three pack as they have to be cut and bent to fit, and so we provide three units to get it the perfect shape and length.

Clock Pendulum Bob

Pendulum Bobs / Sticks

A pendulum bob is the round disk at the bottom of the pendulum. The diameter is the measurement from one side to the other. To select the proper bob size you would need to know the inside width of the clock case. You should have at least 2 inches on each side of the pendulum bob so it can swing in the case without hitting the sides. We have some wood sticks available also and there in the drop down list with the bobs. The wood sticks would have to be cut to length depending on your needs, or we have the pendulums complete and assembled with the bob. For this you would need the movement numbers off of the back plate and see the instructions on the complete pendulums page.


Clock Pendulum Top Hook

Top Hooks

These top hooks are all for a wood stick style pendulum except the letter "I" and "J" units. For most units you would have the wood stick in either 1/2 inch or 1 inch width and put the top hook on it by bending the tabs over as a friction fit. Then the pendulum is all set to be able to hook to the leader. Note: The pendulum assembly consists of the suspension spring on the top, then comes the leader, then comes the pendulum with its top hook attached.

  • A = Works with Leader E and G / Suspension style A
  • B = Works with Leader D and H and F and K / Suspension style A
  • C = Works with Leader N/A / Suspension style A
  • D = Works with Leader B / Suspension style B
  • E = Works with Leader B and C / Suspension depends, A or B
  • F = Works with Leader N/A / Suspension style N/A
  • G = Works with Leader N/A/ Suspension style N/A
  • H = Works with Leader A / Suspension style A
  • I = Works with Leader A / Suspension style A
  • J = Works with Leader A / Suspension style A
Clock Pendulum Leader Hanger

Leaders

Pendulum leaders are notorious for getting lost. If your leader is lost and you need to get the length of the leader on a German movement, get the CM number off the back plate of the movement. This measurement is the approximate length from the top of the movement to the bottom of the pendulum. So if you measure the pendulum tip to tip in inches and then add an inch for the suspension spring, the multiply times 2.54 it will give you the CM length of all but the leader. The remaining length from this measurement and the CM length from the back plate, will be the approximate leader length.

  • A = Works with top hook H and I and J / Suspension style A
  • B = Works with top hook D and E / Suspension style B
  • C = Works with top hook D and E / Suspension style A
  • D = Works with top hook B / Suspension style A
  • E = Works with top hook A / Suspension style A
  • F = Works with top hook B / Suspension style A
  • G = Works with top hook B / Suspension style A
  • H = Works with top hook B / Suspension style A
  • K = Works with top hook B / Suspension style A

Clock Pendulums

Rating Assembly

A threaded rod with its rating nut is installed into the bottom of a wood stick pendulum. It is best to have a preexisting hole or a pilot hole in the wood stick so this can be threaded in. The threaded rod gets installed and then the pendulum bob slides on with the rating nut screwed on underneath.

Item #PD15

  • 1-4 Units $6
  • 5-11 Units $5
  • 12+ Units $4
Clock Pendulums

Single Pendulum Nut

Common sized pendulum rating nut for a brass rod pendulums and others. #10 32-thread brass knurled rating nut.

Item #PD16

  • 1-4 Units $5
  • 5-11 Units $4
  • 12+ Units $3
Clock Pendulums

Pendulum Nuts

Clock pendulum nut six piece assortment is a variety. This nut assortment is the best choice if the old nut has been lost.

Item #PD17

  • 1-2 Units $10
  • 3-5 Units $8
  • 6+ Units $7
Korean Clock Suspension

Korean Suspension

This replacement suspension spring is for a front escapement Korean 31 day movement as it has the curve in the steel rod as to swing without hitting the hand shaft. It is common for the top spring steel to break when the clock is moved often with the pendulum still hanging. These replacement springs and rods come in various lengths and these are listed on the drop down menu.

Item #PD19