Hardware for Clocks


Mechanical Clock Movement Identification - Rather then repairing it sometimes just makes more sense to replace. Save time and money on repairs.

Mechanical Clock Parts InformationAbout mechanical hand nutsAbout clicks and click springs
Mechanical clock parts information and important facts to know. Additionally, it is not always easy to get parts for an antique clock. Many of the parts are now obsolete and the older the clock the harder things are to find. Subsequently, it is not uncommon to need a part custom made. If that's the case, we may be able to help. Please email pictures of the movement to us here at Clockworks.

Mechanical clock hand nuts

One of the most common parts a Mechanical clock needs is the hand nut. As previously stated, the older the clock the harder things are to find. The hand nuts Clockworks offer are for movements made after the 1930's.

Prior to 1930 clock hand nuts

There were not many standards on what the hand nut size should be on the early clocks. However, prior to around 1930 there is no telling what will work. In other words, it is literally trial and error. There was no standard hand nut size. Any hand nut we offer, may, or may not, work. This includes cuckoo hand nuts, American clock hand nuts, or German hand nuts. However, with even all of these assortments, there is a chance none of them will work on the clock.

Post 1930 clock hand nuts

Generally speaking, what we have to offer in the three types of clock hand nuts will cover most of the post 1930 Mechanical clocks. The cuckoo hand nuts fit about 80% of the post war German made cuckoo clocks. The American clock hand nuts fit many of the mechanical time strikes that were so popular. German hand nuts fit most post war German made mechanical clocks, with the exception being a few large grandfather clocks.

Clocks that do not take a hand nut

Not all clocks require a hand nut. Some antique mechanical clocks require a clock hand washer and a tapered pin instead. These secure the minute hand as an alternative to the hand nut. The washer may have a small square hole, or large, oblong or round hole. Clockworks offers an assortment of 100 clock hand washers that includes all the styles mentioned. A tapered pin is used to secure the hand with the washer on top of it. The taper pin is inserted into a hole in the end of the minute hand arbor to secure the washer and minute hand to the clock. A taper pin is a small brass or steel rod that is wide on one end and skinny on the other. Clockworks offers them in an assortment of 100 to ensure the right one is there.

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2020

Clicks and click springs

Mechanical clocks with a ratchet wheel use clicks. This can mean a spring driven clock or a weight driven clock. Clicks keep it wound in only one direction. Both have a ratcheting function as in a wheel being able to turn one way only. It spins one way and makes a clicking sound when this is done. That clicking sound is the click. This is the small part that makes the wheel turn in only one direction. The click is held in the down position with some pressure from what is known as a click spring.

Clicks on spring driven movements

Often when a mainspring breaks the click will loosen considerably from the shock. Replace or tighten the loose click to ensure it will not let go when winding the clock with the key. It is not uncommon to think the mainspring broke when really the click eventually came loose and let the mainspring slip. Once the click on the ratchet slips the mainspring lets loose and momentum of it unwinding is unstoppable.

Clicks on weight driven movements

In general, this is a harder style to replace and not really available on the market. If these are needed for a weight driven ratchet wheel it is best to replace the entire wheel. Replacing the entire wheel will include the ratchet wheel, the arbor it is on and also the gear. It will have the click and spring installed all as one unit. This maybe the ratchet wheel on a chain driven clock or a cable drum for a cable driven clock. In both situations it is best to replace the entire component with the click and spring installed. That way is it complete and done the best and quickest way.

The content of this website is copyright by Clockworks and written by James Stoudenmire in year 2020

Notes on Mechanical Clock Parts

Here are some various mechanical clock parts to help with clock repair. This clock parts page is basically the mix hardware that is sometimes needed. For parts to a pendulum please see This Page instead.

For clock hands, see the clock hands page. The most popular items on this clock parts page would be the German hand nuts and the taper pins. If you order glass be sure to get the correct size as these are returned and swapped often.

Mechanical Clock Parts

We have far more Mechanical Clock Parts then what is displayed here, please use the search bar up top of the page for more. Offering a full line of Hermle clock parts and components as well.

Showing 1–16 of 65 results

  • Clock Weight Accessories

    Clock Weight Accessories (15)

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    Mechanical Clock Suspension Spring

    This is the most common suspension spring needed by far. Suspension A1 is for mantle clocks, A2 for wall and grandmother units. The suspension A3 is for larger floor clocks such as a grandfather clock.

    SUS-A: $10.00$25.00
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    Clock Weight Top Hook Kit

    Brass top Clock Weight Hook Kit for modern German clock movements such as Hermle / Urgos / Kieninger. Comes either with external threads or internal threads. The M* number is the thread size of the screw/bolt, M4 is 4mm, M5 is 5mm.

    WE6: $14.00

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    German Clock Hand Nuts

    German clock hand nuts for post 1950 clock movements. Fits Hermle, Kieninger, Urgos, Jauch and more. However these hand nuts will not work on a cuckoo clock. Cuckoo clock hand nuts are available on the cuckoo parts page.

    CP9: $10.00

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    Round Convex Clock Glass

    Round convex clock glass gets measured from one side to the other, the overall width. When working with a clock bezel it is important to order the right sized clock glass. If the glass is too narrow it will fall out the front of the bezel.

    BZ2: $8.00$70.00
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    Pendulum Suspension Spring Rods

    Frequently needed pendulum suspension spring rods in 17 inch lengths. These suspension rods are cut, bent, and modified as needed for the pendulum to hang onto the clock. They replace the pendulum suspension rods that have worn out and has the spring steel broken.

    LSUS-C: $12.00

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    Clock Chain End Hooks

    Hook and ring set for chain driven floor clock models. The chain link only consists of a bent wire that loops around to itself. Only needs two needle nose pliers to open the connecting point on the link and install these pieces.

    CP16: $5.00

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    Cuckoo Chain Hook Set

    Installation of the cuckoo chain hook and ring set is easy. Each link on the chain is only a wire folded into a unsoldered loop only. With two needle nose pliers a simple twist is all that is is needed to open the link.

    CU15: $5.00

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    Clock Dial Key Grommets

    Three winding hole key grommets 3pk to be used on a clock dial with a 3/8 wide hole. They are to be installed on the dial after drilling out the winding arbor holes.

    CP32: $5.00

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    Clock Parts Chime Hammer

    The chime hammers are the clock parts that strike the chime rods. Three sizes to choose from and this is the approximate length of the hammer head with the tip and screw. The tips of the hammers come in two ways.

    CP1: $1.00$10.00
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    Clock Hand Washer Assortment

    100 Assorted mixed clock hand washers used on antique wall and mantle clocks. These go on top the minute hand on some clocks to maintain tension so the hand does not move around.

    CP7: $10.00

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    Cuckoo Clock Hand Nuts

    6 nuts and 6 washers to fit the hand shaft of a post 1950 cuckoo clock. This nut is screwed onto the end of the hand shaft to keep the minute hand in place.

    CU20: $15.00

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    Grandfather Grandmother Clock Chain

    Grandfather grandmother clock chain by movement maker or links per foot LPF. Count the links on the old chain so it matches the LPF on the drop down menu.

    Chain: $6.00$25.00
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    Clock Repair Tapered Pins

    Used in clock repair these tapered pins come in an assortment of 100 sizes and diameters. These Clock Parts have many uses in clock repair. They attach some dials, movement plates, suspensions and sometimes hands on the clock.

    CP2: $15.00

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    American Clock Hand Nuts

    American clock hand nuts mixed steel and brass. This is a 12 pack of hand nuts that are all the same thread size. They are likely to fit American time strike units produced from around 1930 to 1950's.

    CP14: $10.00

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    Polished Clock Weight Cap

    Polished brass tone weight shell end caps are the tops and bottom of the weight shell. Available in 43mm, 47mm or 60mm diameters and sold individually.

    WE1: $6.00
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    Clock Repair Bushing Assortment

    Solid brass bushings in a pack of 100 assorted outside and inside diameters. Bushings are needed when the pivot holes become oblong instead of round. These bushings are for bushing a clock movement by hand.

    CP20: $15.00

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