Westminster GrandMother Clock Kit

Westminster GrandMother Clock Kit GMKIT4

(9 reviews)


Westminster GrandMother Clock Kit

This quality grandmother or grandfather clock kit has a Westminster chime movement that progressively chimes at the quarter hours. Then it will strike out the hourly count when it’s done with the chime.

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wood stick pendulum for a clock movement

Hermle wood-stick clock pendulum

Select pendulum length and bob diameter

Mechanical Clock Kits on this page are for the clock case maker or to set up all new insides to a currently existing clock.
Mechanical Clock KitsTypes of clock kitsMechanical Movement optionsBuy prior to case creationBuild a Seat BoardPendulum info
Please view these information tabs for Building Mechanical Clock Kits.

Mechanical Clock Kit Styles Available

Mechanical Clock Kit Styles Available include wall clocks, mantle (shelf) clocks, and floor clocks. Floor models includes the granddaughter, grandmother, and grandfather series. Mechanical Clock Kit Styles are in the list below.

Mantle clocks

Mantle clock kits are always spring driven and wound with a clock key. Moreover, it can come in a variety of chime types. Triple chime, Westminster only, bell strike, bim bam or gong strike.

If the clock has three places to wind with the key it is a quarterly chime unit. This means it is either Triple chime or Westminster only. In other words every 15 minutes it will progressively play part of the song. At the top of the hour it will play the complete song then strike out the hours.

Wall clocks

Wall clock kits may be spring driven or weight driven. There are more spring driven wall clocks in the world than weight driven. The weights are not light and it is a lot for a wall to hold.

So fastening it well is very important. The movement can have a pendulum or no pendulum but of course the pendulum is most popular. When a mechanical clock does not have a pendulum it has a balance wheel instead. This is a floating and rocking wheel on the top of the movement and operates more like a watch balance.

Mechanical Clock Kit Styles - Granddaughter or Grandmother clocks

Typically, granddaughters are spring driven with no weights.

The grandmothers are usually chain driven. The chiming units have three weights. Any other strike style has two weights. It is a shorter clock overall than a grandfather clock.

Grandfather clock kits

Typically cable driven with three weights and triple chimes.

This means the weights will hang on cables instead of chains, and plays choice of three songs. However it is not always triple chime because some are Westminster only. This is the largest and tallest of the floor clocks.

Chime types

All of the above mechanical clock kit styles, in the past, have been made with every chime type. In other words there are all these various ways to make the clock play a song or make a noise.

There is the quarterly sounds that play a tune ever quarter hour, the most common of the songs is Westminster. Or there is the triple chime that includes Westminster, St. Michaels, or Whittington.

As for the other noise makers, we call them strike clocks because they only strike out the hours and usually bong once on the half hour. These include Gong strike (coil gong on the back or below the movement), Bell strike, or Bim Bam (sounds like its name, on two or three strike rods).

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2022

Mechanical clock-kit movement options

The following are the various options for Mechanical clock-kit movements to utilize in building a clock.

We offer complete kits at Clockworks, however we can't include them all as it would be overwhelming. It may be possible to alter any aspect in the clock kits that are available. Please call to let us help with kit modifications or for general assistance.

Mechanical clock-kit movement options - Floor Clocks

Chime type

Either Westminster only or triple chime. Both of these Mechanical Clock Kit options play a melody every 15 minutes and require a three weight movement.

Also there is the bell strike option that will play on the top of the hour whatever hour it is, and once on the half hour.


Options are the length, the bob diameter, and if would like a wood stick style The Pendulum or a fancy lyre style The Pendulum. The wood stick style is more antique look and the lyre is the contemporary style.

Hammer location

Either on the back for standard depth cases, or for the shallow depth we can do a side hammer unit.


Either a phase of the moon style, or just the hump top that says Tempus Fugit. Or we can zip off any moon Dial or TF dial to provide a very nice square metal dial with no hump on the top at all.

Another option is to use heavy paper stock on a thin board, use spray glue to make it stay.

Mechanical clock-kit movement options - Wall Clocks

Chime type

Either Westminster only, Triple chime, Bim Bam, gong or bell. Lots of chime options there, but whatever wanted to listen to out of these we can do.


Either the wood stick style or sometimes if its short enough, we can put a brass rod pendulum in.

The Mechanical Clock Kit options brass rod pendulum is different than the metal lyre pendulum as its just a brass rod going straight down with out all the decor.

Hammer Location

Includes the back, or on the side, or even the bottom on the wall clock kits.


Square dial made of heavy paper stock that uses a spray glue in order to attach it to a thin board, or a metal dial.

In Arabic or Roman numerals. The dial on a wall clock would mount to the wood trim that goes around the dial, not interlocking with the movement.

One style you can't get these days are the round dials that do lock into the movement, to have the appearance of the dial just floating in the air with the mounting hidden such as the Vienna regulator style.

Mechanical clock-kit movement options - Mantle or Shelf Clocks

Mechanical clock-kit movement options - Chime type

All of them really. an have Westminster, triple chime, gong, bell, or Bim Bam strike for Mechanical clock movement kit options.

Mechanical clock-kit movement options - Pendulum

Options include metal rod to a decor for the kitchen style clocks are available, or a wood stick pendulum if the clock is tall enough. For the shorter mantle units it will be just a round bob that is usually adjustable for time keeping.

Mechanical clock-kit movement options - Dial

The hardest on the mantle units. To get a the dial with bezel with glass in convex or flat is ideal, however not always possible.

If the situation calls for this type of clock dial, may want to chase a different clock design to make, it is not often it works out well unfortunately. The shelf clocks are easier as it has a door that closes with glass in the front, rather than the round brass bezel with dial and glass all in one combination.

This concludes the Mechanical Clock-Kit movement options. Please call to discuss the clock kits with us 800 381 7458.

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2022

Clock kit before building the clock case

It is important to order the clock kit before building the clock case. It's possible the kit will not fit if the case is built before getting the mechanical clock kit.

Although it may seem counterintuitive, it is more common than you might think. To put a lot of effort into building a luxury case only to realize that the necessary components do not fit inside. It is advisable to purchase the clock kit first to avoid this frustration and potential financial loss, . This will allow you to ensure that all the components fit properly before investing time and resources into the case.

Why order a clock kit before building

To find or adapt a clock kit to the case is very difficult. The ideal dial or other parts may not exist in the size that the case requires.

Moreover, measurements need to be correct for the clock kit to fit into the case.

Always order the Mechanical Clock Kit before building the case. Having the clock kit set up on a stand while working on the case is ideal.

Naturally, it will be easy to measure the various parts of the clock kit such as the pendulum swing and dial. Having the luxury of the components being in the air makes it much easier to measure and is a wise decision.

Not all clocks are made

Many sizes of antique clocks dials are not made anymore. Grandfather clocks back in the day had large Clock dials with ships on them.

They most certainly are gorgeous but try to find another one like it. These are no longer available. This is the case with many others as well. This is yet another reason to buy the clock kit before building the case.

The winding arbor holes will need to be done, if a dial can be found. This way it will have a hole to put the key or crank into. Chain driven clocks are the only style that does not need winding holes in the dial.

Alternate kit component availability

Clockworks offers a large variety of clock movements. However, when it comes to some components resources can get slim. This is why it is important to buy the clock kit before building the case.

Clock dials are the hardest because there are so many shapes, sizes, and options available. Examples include round dials, square, hump top with no moon, and moon dials.


To sum up this topic on clock kits. It is wise to get the Mechanical Clock Kit before building the clock case. The best thing to do is set up the movement kit in the workshop. This way you can visualize the size prior to installation.

So, do not build a beautiful case before buying components for it. Purchasing all of the components first will give you the opportunity to measure them and ensure they will fit in the case. This will help you avoid the disappointment of designing a case that cannot accommodate your components.

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2022

Making a Grandfather-Clock Seat-Board

Making a Grandfather-Clock Seat-Board, which is the mount that the weight driven movement sits upon, is fairly easy.

Of course, the movement sits on this with cables or chains. Subsequently, they hang directly down between the boards.

Typical approximate dimensions

Additionally, many of the modern clocks have a seatboard that is 16 inches wide and is 2 and a half inches deep. However this varies depending on the clock case dimensions.

In the center of the mounting board is a hole that is 1 inch wide. It goes across the center of the 2 and a half inch deep seat board.
Grandfather clock movement seatboard

Putting it together

The hole is wide enough for the movement to sit on the board with its chains hanging down in the center. Then the seat board screws and washers can go up into the movement’s arbors on the bottom.

These are the screws with the rectangle washers. Of course, an easier method would be to mount two, three quarter or 1 inch square boards running parallel, which are 1 inch apart, across the inside of the clock case. This is really all a mounting board needs to consist of.

The only thing that has to happen is the movement is in the air with the chains dangling down in between these boards. The boards just can’t be so wide that the pendulum rubs it on the back of the movement.

With the movement mounting in the air, all that needs to be done is have the chime block mounted.

This goes on the back of the clock case. This enables the hammers to engage with the rods for the chime sound. Next hang the weights and pendulum. The final step is to lock the dial into the movement from the front.

Making a Grandfather Clock Seat-Board

A plywood seat board

Making a Grandfather Clock Seat-Board

Many ways to make a seat board


A simple test stand


Clock case seat board

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2022

Grandfather Clock Pendulum Information

Grandfather clock pendulum information begins with the obvious discussion of length. The length of the pendulum on German units comes in a few CM options.

German units measure the pendulum from the top of the movement to the bottom of the nut threads.

The pendulum itself, the leader it hangs on, and the suspension spring that the leader hangs on.

All three components in centimeters make up that CM length in the drop down menu.

Hermle Clock Movement Availability

Pendulum length information

To know how long the actual pendulum is, subtract 15CM from the options with the pendulum length.

This will exclude the leader and suspension spring, and be the actual pendulum length from tip to tip off of the clock.

This length can vary as if a larger pendulum bob is selected, the actual length of the pendulum gets longer.

Why the CM length matters at all is because if the pendulum length is not near the CM length of the movement, the clock will not keep time.

So the gearing in the movement and the pendulum length works together to keep time around the specified CM length.

The bob width Options

A Lyre grandfather clock pendulum comes with either a 6 1/2, 8 1/2, or 10 1/2 inch bob diameters. The 'Bob' is the round disk at the bottom of the pendulum.

Moreover, the CM length on the movement will indicate the length of the pendulum from the TOP of the movement all the way down to the bottom of the pendulum nut threads.

This is an approximate length that depends on other factors such as bob diameter and weight of the pendulum.

Basically if the CM is 94CM the pendulum itself will be about 35 inches tip to tip off of the clock, and the 114CM option would put this same measurement at approximately 44 inches.

Westminster GrandMother Clock Kit

Quality Westminster GrandMother Clock Kit with an 8 day chain driven run time. Quarterly Westminster chime will play chimes progressively. Then on the top of the hour, it will strike out the hour. This versatile kit is useful for either a grandfather clock or a grandmother clock case.

The dial size is a standard size for grandfather clocks. However the simple chain driven and stick pendulum combination is also common in the grandmother clock series.

Clock Kit Movement

German made, quality clock movement by the Hermle clock company. In addition, the Quarterly Westminster chime will play progressively. And on the top of the hour, it will strike out the hour. Furthermore, the rear chime hammers will play onto a chime block with rods that mount to the back of the clock case. This is an 8 day, chain driven, German made, Westminster clock movement.

Phase of the Moon Dial

A moon phase disc will spin indicating the location of the moon. In the old days it would indicate the best time to travel when the light of the moon is brightest. That way it is easier to see danger and less risky.

These days it's just another cool thing to have on the clock thats traditional. The dial will have four feet on the back side. These four posts, or feet, will lock into the front plate of the movement.

Therefore the dial secures to the movement and not to the wooden clock case. The movement kit will come with a moon gear that mounts to the same tube as the hour hand. This one gear alone will drive the gears behind the dial and spin the moon disc.

Pendulum Lengths

There are two lengths for sale on this webpage. However, there are more options available. So if there is a need for a longer or shorter pendulum, please contact us. Measure the pendulum from the top of the movement all the way down for German units such as this. This includes the complete pendulum, the leader it hangs on, and the suspension spring.

The basis of this length is on the smallest bob diameter possible and is on the back of the movement in a CM number. Of course the CM number is in centimeters and the actual length will be slightly longer if there is a wider pendulum bob.

Pendulum Bob Diameter Options

A pendulum bob is the round disc at the bottom of the pendulum. It comes in polished brass and matches the weights and dial. The bob has some options with how wide it is to be. The bob width should have two inches on each side to swing back and forth without hitting the sides of the clock case.

Additional information

Weight40 lbs
CM Length

85cm, 94cm, 114cm

Bob Diameter

4 1/2 Inch, 5 1/2 Inch, 6 1/2 Inch

  • German Movement
  • Westminster Chime
  • Silent Switch
  • Chain Driven
  • Moon Phase Dial
  • Wood Stick Pendulum
  • 2-year warranty

Hermle wood-stick clock pendulum

Weight2 lbs
CM Length

85cm, 94cm, 114cm

Bob Diameter

4 inch, 4.5 Inch, 5.5 Inch, 6.5 Inch, 7 1/8 Inch

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Clayton K. Hummer
Clayton K. Hummer
1 year ago

i need a movement that i can shut off chimes .. any product match that format ?

Jay Brent Stoltzfus
Jay Brent Stoltzfus
1 year ago

My Grandfather made a grandfather’s clock about 80 years ago. I inherited it from my father. It was stopping so I had the works rebuilt 23 years ago and it ran flawlessly up to now. I would like to replace the works and chimes only, in an attempt to keep it as original as possible. Is this a possibility?

Last edited 1 year ago by Jay Brent Stoltzfus
Larry Coughlin
Larry Coughlin
1 year ago
Rating :

Very good service and on phone help.

Paul barnes
Paul barnes
1 year ago

I inherited a grandmother clock with a German movement UW32001B it has two sets of hammers looking at the back it has hourly hammers on the right and chime hammers on the left.I cannot get it to chime or strike on the hour.

Joseph G Berendzen
Joseph G Berendzen
2 years ago

My father gave me a grandmother clock kit that I assembled in 1988 and we ran it continually for about 20 years when we stopped it. I just recently started it up. It will run for about five minutes and the pendulum strokes get shorter and then it stops. In researching, I found a couple of suggested possible causes: a weak suspension spring, or worn deadbeat escape wheel. The spring is not broken, but is there a way to determine if it is weak? The escape wheel teeth do not look like regular gear teeth, they are very pointed, and have a hump on one slope. If I could send you a closeup photo maybe you could help me determine the wheel condition? I really want to pass this on to my descendants as a family heirloom and I would like it to be working properly without their having to work on it.
Best Regards, Joe

Bakman Joseph
Bakman Joseph
2 years ago

I bought a grandfather kit based on Hermle 451-050H 94 cm.
I want to build a simole case.
Can I get some drawings?

3 years ago

I accidentally knocked the pendulum off while lifting the weights on my Herscede Grandmother clock. Where does it attach?

3 years ago

I started to build an Emperor grandfather clock using their plans (not the kit) 51 years ago. That’s right 51 years ago! Back when I was 20 years old (I’m now 71) I had cut and assembled about 90% of the case.After building a couple homes and having the same amount of wives. I retired built a pole barn wood shop and just finished the case. The case is the Emperor Cambridge Grandfather Clock and has a pendulum swing has a limit, the waist is 11-3/4″ inside dimension. I have found movements that will function however; in researching movements I have found the movement plates which the movement is made from is the key to longevity of the movement. Is there a difference between those which the plates are 1/16″ verses 1/8″? If so, what movements have the 1/8″ plates that will function in my clock case? Thanks

Shane Roberts
Shane Roberts
4 years ago

My grandfather built a grandfather clock case many years ago however he did not include the movements. I was given the case after he passed away and want to put the movements in it. Our only clock person in town is retiring and doesn’t want to mess with it. What measurements do I need to determine the correct movements?