The American Watchmakers-Clockmakers Institute in conjunction with our industry partners has established a set of minimum standards which all clockmakers should meet. The document, Standards & Practices for Clockmakers outlines these standards and the details of our certification exam.

A Visual Reference of specific standards is below which can be used by clockmakers, employers, and consumers to judge the quality of workmanship.

Clock Bushings

An excellent bush is one that realigns the depthing of two wheels correctly. The wheel and the pinion pitch circles touch each other as close to their line of centers as possible. The excellent bush is always flush to the inside of the plate, Figure 1, and stands flush, Figure 2, or no more than […]
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Lantern Pinion Depthing

One of the most important skills in horology is correcting/resetting the engagement of wheels with their respective pinions. It is one of the most critical issues necessary to insure the smooth running of any train of gears. The depthing of a wheel and lantern pinion is measured at the moment where the point of contact […]
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Pinion and Wheel Engagement

One of the most important skills in horology is correcting/resetting the engagement of wheels with their respective pinions. It is one of the most critical issues necessary to insure the smooth running of any train of gears. The depthing of a wheel and pinion is measured at the moment where the point of contact of […]
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Pivot Burnishing

In recent years there has been a lot of talk about pivot burnishing. This is a skill of using an oiled, hardened polishing lap (burnisher) to resurface and render the pivot operating surface bright, flat, smooth, and toughened. Note the reference here is to “toughen,” as the process will not harden the pivot but toughens […]
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