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Clock Pendulum Suspension-Spring Information
The following is a discussion on clock pendulum suspension-spring information. Naturally, suspension springs do not have to be exact in length. If the clock runs slow, simply raise the pendulum bob with the rating nut at the bottom.
Likewise, if the clock is running fast then turn the rating nut to lower the pendulum bob.
Most common springs
By and large, suspension spring A is the most common style suspension spring. Of course, it is most likely the one by default.
If the old suspension spring looks similar to this one then it is right. As a general rule of thumb, small mantle clocks take suspension A1, wall clocks and small grandmother units will take suspension A2.
The A3 size is for grandfather clock units with a larger pendulum bob diameter.
This size can also be seen on Grandmother clocks with larger bob diameters. Use the larger A3 with large bob diameters so the bob will not wobble front to back.
If using a pendulum with a bob of 8 1/2 inch diameter or larger please order Suspension A3 for this reason.
Not as common
Urgos uses the single hook style as seen in picture suspension B. However suspension A was the very most common to use.
Very old antique round movements mainly use Suspension C and Suspension D. These are mainly French clocks and US made units made prior to 1945.
I have a grandfather clock with only this number on the movement 12685 , no name of markings . sound is Viola DRGM. Does anyone know the maker?
Please send some pics to clockworks@clockworks.com of the clock movement
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
My Sloan Quartz Anniversary clock operates on one AA battery. It seems to be keeping great time. The suspension pendulum will move back and forth when I touch it, but it slows down and stops. It doesn’t affect the time . Is it just for looks ?
Disposable. Just for looks now
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
What is the appropriate pendulum sprimg for Ridgeway Tempus Fugit weith an Urgos movement UW32/8
Thank you, James 🙂
Please order suspension spring A2 if you have a pendulum bob less then 8.5 inches wide, this is the round disk at the bottom of the pendulum
Please order suspension spring A3 if you have a pendulum bob is 8.5 inches wide or larger, from this link
https://www.clockworks.com/product/mechanical-clock-suspension-spring
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have 1960s weight driven “BBH” Aug Schatz & Sohne grandfather clock that is an heirloom that I’d like to keep running but the suspension rod or spring (pendulum hooks to it) broke. I’ve spent hours trying to find a replacement but no joy. It’s 4” long. Any help on where to look for a replacement?
Please ask this same question and with pics to clockworks@clockworks.com so I can see
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
I have a emperor clock co by Hermle black forest clocks. Which suspension spring will fit the 451-050 94 cm
Please order suspension spring A2 if you have a pendulum bob less then 8.5 inches wide, this is the round disk at the bottom of the pendulum
Please order suspension spring A3 if you have a pendulum bob is 8.5 inches wide or larger, from this link
https://www.clockworks.com/product/mechanical-clock-suspension-spring
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Hi, I have an URGOS clock made in Germany. # UW32075D # 1329503 40 JEWELS , I am looking for suspension B single hook style. Where can I purchase this part ? I am located in Toronto area in Canada [email protected]
The Urgos 32 series requires these components for the top section of the pendulum assembly where it interacts with the movement. The pendulum assembly from the top down consists of the suspension spring that hangs from the top most post sticking out of the back of the movement. Then comes the leader that hangs onto the suspension, the leader is a sort of flat long bar that the pendulum actually hooks on to. So its the suspension on the top, the leader hangs on it, then the pendulum hangs on the leader with the pendulum top hook.
Suspension A2 from this link usually
https://www.clockworks.com/product/mechanical-clock-suspension-spring
Suspension B2 from this link rarely
https://www.clockworks.com/product/urgos-clock-pendulum-suspension
Leader C from this link if the clock is old
https://www.clockworks.com/product/urgos-clock-pendulum-leader-2
If needing a leader for the new style, sorry do not have it right now
The pendulum top hook for a wood stick pendulum is available at this link
https://www.clockworks.com/product/urgos-clock-pendulum-top-hook
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
1970s clock moved from father-in-law house to mine clock runs for about 5/6 mins then stops
What are the numbers off of the back plate of the clock movement itself? If it is hard to get to, usually you can stick a cell phone up behind the movement and get a picture of the numbers. Or through the side access panel if there is one.
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
What suspension spring should I use for a Seth Thomas mantel clock
There are so many clocks of different styles under the same ST name. Best to email a pic of the back of the unit to us at clockworks@clockworks.com and ask this same question so we can see
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Now I know I need an A1 suspension spring, thank you.
I have a antique Morbier/ Comtoise 8″ pendulum clock.what suspension spring should I order?
Hi,
Whatever it is it is required in parts for that clock movement is no longer made or available.
Something custom would be made or modification to that what does exist. Or we would need to match it up to one of our own parts units.
If you would like to send it in for restoration, we could figure it all out here, along with the restoration process.
Are you interested in sending the movement only?
James
Is there any difference in the thickness of the suspension spring?
No difference in the thickness on these suspensions https://www.clockworks.com/product/clock-pendulum-suspension-springs-assortment
James
Many Thanks !
James and Donna Stoudenmire http://www.clockworks.com 124 Goss Hill = UPS Mailing PO Box 339 = USPS Mailing Huntington, MA 01050 USA clockworks@clockworks.com
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I have a Seth Thomas 124 movement
Usually using one of these suspensions. Cut, bend, form to fit the application https://www.clockworks.com/product/clock-pendulum-suspension-spring-rods
James