Clocks, Watches/Hermle 350-020

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Expert: - 1/21/2008


Question
We own a floor clock with a Hermle 350-020 movement. Recently we replaced the original 1973 movement with a new movement. The new movement runs fast (about 3 minutes per day) and I was hoping you could provide directions on how to adjust the speed. Thanks in advance,

Answer
a Hermle 350-020 movement has no weight or pendulum- bit unusual in a floor clock. the 020 has a balance wheel escapement much like a watch and the slotted shaft on the top of the balance unit gets tweaked with a screwdriver to adjust the speed of running-- ccw to speed up.

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Kenneth Saunders

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any mechanical clock question -no watches- no battery clock questions and no appraisals-ie: "how much is my clock worth?" type questions please! Attach a photo if possible and note all markings on the rear of the mechanism- thanks 40 years as a professional clock repair person- still a full time clock repair service owner

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40 years as a professional clock repair person- still a full time clock repair service owner.

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