Description
Clock Let Down Tool
The clock let down tool set of 4 comes with a handle and 3 chucks that fit just about every winder arbor size. Put the chuck into the handle and release the mainspring in a slow manner, carefully controlling the release with the hand grip.
This is done by putting the tool onto the key post arbor and gently releasing the click. While doing this, the fist is around the handle. This allows the power to release and let down with gentle care.
Of course the other way of doing this is to try and do it with the key. This is not advisable and usually ends bad for the person’s hand and the clock movement.
Additional information
| Weight | 0.25 lbs |
|---|---|
| Dimensions | 1 × 2 × 4 in |

I have an anniversary o’clock that has worked very well for a couple of years. The last time I wound it, though I think I overwound it. Now it does not work anymore. The pendulum moves back-and-forth and the gears actually turn. But after a few minutes, it stops . The clock is level. I thought maybe I could loosen the spring with a letdown tool, but the main spring release lever is completely stuck. Any suggestions?
We have 400 day help and troubleshooting at this link
https://www.clockworks.com/clock-repair/clock-repair-help-1.html
We have suspensions and parts at this link
https://www.clockworks.com/clock-parts/400-day-anniversary-clock-parts.html
James Stoudenmire
40yr Clockmaker
Author of Clockworks.com
Is this tool – Letdown Tool CT25: – in stock? Thank you.
Yes it is
James Stoudenmire
30yr Clockmaker
Author of Clockworks.com
Big thanks to Christian for all the help.
THANK YOU
What are the actual arbor sizes that this set covers? The description “fits just about every winder arbor size…” doesn’t tell me enough to decide.
Unlike the “response” below, mine was a serious question about the product– what are the arbor sizes this set covers?
5,6,7,8,10,12
Will these fit a Howard Miller 1050-020 movement or do I need a metric set?
Yes it sure will. The size key that one takes is a size 8, and the 4 pc let down set includes the size 8 needed.
Keys
https://www.clockworks.com/product/brass-single-end-clock-key
Let downs
https://www.clockworks.com/?post_type=product&s=Let+down
James
Thanks.
Ron
No problem at all have a nice day
https://www.clockworks.com/
James
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