Hermle 451 Series clock movement
Hermle 451 clock movement
Being one of the most produced movement in the clock world, the Clock movement 451 Series is very popular. The 451-050 and the 451-053 are only rivaled by the 340-020 mantle unit for quantity produced. A Hermle 451 Series clock movement will work for 25 - 30 years night and day with out much complaint.
The movement
A grandmother sized clock case would except the Hermle 451 Series clock movement perfectly usually. This clock movement has square outer movement plates that are 120 x 120mm. A chain driven, three weight, Westminster chime clock movement, that fits into tight places.
Pendulum, chimeblock, dail or weights sold separately. Hand nut, chains, suspension spring and leader come with the new Hermle 451 Series clock movement. Chains, leader and suspension spring included. It is basically everything that comes out with the two screws underneath removed. With so many sold, the part and component availability is high for the 451 clock movement, this cannot be said about many other clocks.
The support
You would think if a family has been doing something for 100 years they would know what their doing. Well, your right! So if any questions about the product at any point in time, even 10 - 15 years later, ask. We can assist long after the factory warranty of 3 years. Instructions on removal of the old and the install of the new Hermle 451 Series clock movement, with support if needed.
- A fraction of the price of an overhaul
- Should last 25-30 years, an overhaul would not
- Instructions and expert support
- Hermle Clock Movement of Germany
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Are there any dial faces available for a Hermle 451-030 cm66 movement?
Yes many. What size and will it have phase of the moon?
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I just received my Grandfather’s grandfather clock (don’t know who made it). It has the 451-050H, 85cm, 70.777 mechanism. I have finally got it “hooked up” and running, however the pendulum gradually slows down and eventually stops. Is there a calculation as to where the bob(?) (just learning – circle at the end) should be positioned in order to keep the time accurately? Any “manual” information you could provide would be greatly appreciated as well (links). Thank you.
Hi,
The clock stopping and the timing of the clock are two separate things. As for timing, if the clock is slow in timekeeping turn the nut on the bottom of the bob as to raise the bob some. Opposite for slowing it down.
As for running, be sure the clock is in beat, see this link
https://www.clockworks.com/posts/mechanical-clock-movement-beat-setting
IF that does not do the trick, it maybe time for a new movement 451-050H 85cm from this link
https://www.clockworks.com/product/451-050h-hermle-clock-movement
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
My hermle 451 movement chimes are playing too fast. Some kids tampered with the weights and chains….left chain was pulled off the wheel and the right chain was pulled down too far.
Right and left weights were removed.
I managed to replace the chains in their correct place on the wheels and hung the weights again…but the chimes are now too fast. Everything else is working correctly.
Another thing is that all three weights are equal…this is is the way I received the movement kit when I ordered it. All three weights are 6 lb.
Hi,
The weights are fine. The chimes too fast means the fly (fan) on the top of the chime train is loose on its arbor for some reason. It is not an easy one to explain or adjust on the customers end. The only way it can become loose is by someone bending the fan, must have happened during the chain mishap.
Please email us by replying to the invoice that was emailed to you with this very same question so we have your order information, so we can resolve in some way
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
I have just purchased a clock with this movement. It is missing the pendulum and the weights. I think I have the pendulum figured out. I was wondering what size or weight weights were needed? Looks like it needs three total. Thanks
Hi
Clock needs 1 weight at 4.7LBS and two weights at 6.6LBS from this link if the pendulum bob is 8.5 inch or more.
https://www.clockworks.com/clock-parts/clock-weights.html
Clock needs 1 weight at 6.6LBS and two weights at 4.7LBS from this link if the pendulum bob less than 8.5 inch wide
https://www.clockworks.com/clock-parts/clock-weights.html
The heaviest weight would go on your right as you face the clock.
The lightest weight will go on your left as you face the clock.
The middle is light or heavy depending on the bob diameter.
(The larger bob diameters require more weight in the center.)
James
I have a 451-050 and I would like to know which weight goes on what chain? There are 2 weights that appear to be the same weight and a third which is quite a bit heaver. Where does the heavy one go on which chain form left to right.
Thanks Alex
Heavy weight will go on your right as you face the grandfather clock
Weights
https://www.clockworks.com/product/polished-clock-weight
James
How do you bend hammers to mimic removed movement
I have a 451-050 movement that I think is working OK. It only rings once on the hour.. Is this movement supposed to ring as if to count the hours? such as 4rings at 4 o’ clock 10 at 10 etc.
Yes the movement should strike out the hours.
James
Strike Quantity Issues
This have to do with the mechanics in the front part of the movement, behind the dial. The best way to learn the mechanics of these components is to simply watch them in action.
When getting to the front of the movement by removing the dial, observe the racks motion during the strike. The rack is the saw like thing that drops down onto the snail looking thing that is part of the hour hand tube. If the rack is not connecting to the snail in a proper way, the strike will not strike the proper amount of times.
If the clock is striking the wrong number of hours some hours and not all, the snail (hour tube) must be turned slightly so the rack will fall on the snail’s humps correctly. The C clip comes off the gear it meshes with, so the hour tube can come up some and over the teeth of the other gear. The goal is to have the snail fall in the center of the hump instead of off to the side of it. If the clock strikes 12 and 1 oclock ok, then the rest will be fine.
If the rack is getting stuck on anything or if it falls behind the hour tubes “snail”, then the clock will strike the same amount of times every time, forever or some number beyond 12 times. It can fall behind the snail by changing hands, since the hour tube has the snail on it, it moves forward upon removing the hour hand. This can cause the rack to fall behind the snail and therefore does no good for counting strikes like it’s supposed to. The fix is to lift this rack with your finger and push the hour hand tube back so the rack falls on it.
James
I have a 1970’s Hamilton grandfather clock with a 451-050 Low bridge movement, 3 weights. It hasn’t run for a decade. The suspension spring was broken, It had been replaced before and removed. Apparently, that’s how to adjust the beat? Anyway, the chime side weight (right side looking from front) just falls. Is replacing the whole movement my best option? I think it is. Also, will I need a hand puller? Thanks!
I will have to agree with you.
Please see the information regarding the replacement movement here: https://www.clockworks.com/product/new-451-050-clock-movement-by-hermle
Thank you !
Hello, I have a 42 year old Hermle 451-050 that works great with one exception. It chimes perfect every 1/4 hour, but only “STRIKES” every other hour. The pin that lifts the rack is catching on the rack after the odd strike. Is there a way to adjust this cam/pin or is the movement wore out? BTW, it was cleaned and oiled recently.
That pin for the rack count would need to be turned some on its arbor it rides on. In other words the cam would need to be moved so it is out of the way when its done striking. It would need to be turned independently of the arbor its riding on. It is friction fit only, it is not easy to turn sometimes and big risk on bending the arbor it is located on.
James
Thank you !
Thank you for your quick reply. I was thinking along those lines but , when I tried to turn the cam it didn’t want to budge and so I chickened out. I will try again now that I know for sure it’s a friction fit. Again thank you.
Lewis
i JUST MOVED THE CLOCK (451) TO A NEW HOUSE NOW IT IS NOT SOUNDING THE HOUR AND THE 1/4 HOUR.
THE CHAINS ARE ON CORRECTLY. i HAD TO MOVE THE HANDS 11 HOURS FORWARD TO SET THE TIME, IT IS KEEPING GOOD TIME
Hi
Chime is the quarterly songs Strike is the hourly strike, that follows the top of the hour chime song
So are you saying the clock will not chime at all?
It will need to chime before it will ever strike
Please let me know.
James
Thank you !
What is the difference between 451-050/85cm DB and 451-050/85cm DBL
It is for a 1974 Seth Thomas grandfather clock. Original movement has 85cm/70.77
The difference is High Bridge verses Low Bridge: [image: image.png] Please email us with any other questions.
clockworks@clockworks.com
Thank you !
DB = dead beat DBL = dead beat low bridge
James
Thank you !