Dare use 0W-20 full synthetic motor oil on a Seth Thomas 8-day balance wheel clock?

Robert Gift

Registered User
Nov 12, 2012
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Denver, Colorado
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Thrift Store bought. At first would stop running - seemed like when a certain part of thescape wheel would come around to the pallet.
(I turned it upside down and gently "spun" the balance wheel - if that would help.)
Now running and chiming fine.

On the bottom hinged back cover: Exeter Model No: E538-002. 8-day Keywound (A-206) Strike Movement
6710
= date stamp?

Shall try to posts photos.
Thank you.
 
Last edited:

Willie X

Registered User
Feb 9, 2008
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Robert,
No oil would normally be used anywhere on the balance wheel assembly ...
The oil you mention should be good for the pivots, use barely enough to see. You would probably do better with something a little thicker on the springs and they need to be removed from the barrel and stretched out flat to clean and lube. About 4 or 5 drops per spring is enough.
Willie X
 

Elliott Wolin

NAWCC Member
Nov 18, 2019
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Williamsburg, Virginia
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I read recommendations to use fully synthetic 10W-60 on springs and large pivots, and 0W-20 everywhere else.

I once got a Hermle floating balance to run really well using the tiniest amount of synthetic watch oil on the two jewels surrounding the balance wire.
 

Willie X

Registered User
Feb 9, 2008
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"everywhere else" should not include the balance assembly. What gets inside the balance wheel tube stays inside the balance wheel tube ... lubrication at this point is totally unnecessary anyway.

Willie X
 

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