Removing a clock mainspring barrel

Posted on    Posted in  turned_in_not  Clock Parts

Removing a clock mainspring barrel

Often a clock mainspring barrel can be removed without disassembling the clock movements outer plates. The mainspring will also still be contained within the barrel.

Letting down the mainspring power

The mainspring let down tool allows the release of the mainspring with the fist rather than the fingers. Put the mainspring let down tool over the square post the key goes onto. With a flat screwdriver, move the click out of the way. The click has a tension spring that needs to be held back. This is what holds the mainspring so that it winds in only one direction. Slowly allow the mainspring to unwind in the fist. This method lets you control the speed of the unwind with your whole fist rather than the fingers. Unquestionably, doing this with a key will result in a painful experience on the fingers. Of course, if the mainspring is broken, there usually is no worry since there isn't much tension to begin with.

After the barrel is out

Once the power has been let down, the next step is to yank out the winding arbor shaft. The clock mainspring barrel should then fall out the side of the movement. After the barrel is removed, it can be seen the number that is on the barrel end cap. This will tell what hole end mainspring to order. You can locate the mainspring by using the hole end mainspring chart. Be sure to check the movement for any damage as a result of the mainspring breaking. In particular, inspect the teeth of the gears, as well as the arbor on the next wheel up. This could have consequently been bent.

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

↑ Back to top

2
Ask a Clock Question

avatar
  Subscribe  
newest oldest most voted
Notify of
Billy W. Lanier
Guest
Billy W. Lanier

I have a Ridgeway clock, spring driven, mechanism marked only “Gravely Furn Co Inc; Martinsville VA/USA; Made in Germany; No (0) Jewels; Unadjusted; n=4390.” There is a serial number at the bottom center “370081.” I need a new mainspring w/barrel. I have the barrel out of the clock, and there are no markings whatsoever on it. The rear cover plate (lid) has a “u” shaped hole on one edge. Barrel is 44.55mm outer (teeth) dia, barrel 39.89mm dia, drum depth 21.31mm, and shaft height from front to back 33mm. Drum has 60 teeth. I can’t find anything that matches this… Read more »

Shop By Brand

Shop Hermle

Find the perfect Hermle movement for your clock.

Howard Miller

Find the perfect Howard Miller movement for your clock.

Shop Kieninger

Find the perfect Kieninger movement for your clock.

Seth Thomas

Find the perfect Seth Thomas movement for your clock.

Shop Urgos

Find the perfect Urgos movement for your clock.

Ridgeway Clocks

Find the perfect Ridgeway movement for your clock.