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  • Recent Lesson Discussions

    • Hi Mark- It's Tukat.  This was an EXCELLENT Video.  Your careful explanation as to the interaction of the various parts relative to all the other parts is easily the most valuable instruction you have provided so far.  My Thanks, and I'm looking forward to other videos as you post them.  With my regards.
    • Hello Mark, May I ask which movement you are using for your demo's on the motion and keyless work vids. Cheers, Vic
    • As usual clear and concise. As we go on the ability to name all the parts will be of benefit to all tinkerers like myself to enable the correct info to be submitted for forum help. Cheers, Vic
    • I will be honest - I am not sure on the safety aspect of this so best not for me to advise. Benzine is highly flammable.
    • The final major component of any modern wristwatch is the keyless work.  Many vintage pocket watches would have been wound up and the hands set by use of a key. Naturally, this required the owner of the watch to have the key to hand in case the watch needs to be wound or the time adjusted. Modern watches allow the user to wind the watch up and set the position of the hands by the use of a so-called key-less mechanism. The keyless mechanism is a small group of components which can be manipulated by the crown and stem, often called the watch winder. Usually the user will only physically see the crown. The crown will usually have two positions of operation unless the watch has a calendar mechanism. The regular, pushed in position will allow the user to turn the crown and in doing so the keyless mechanism will effectively wind the mainspring. When the crown is pulled out, the keyless mechanism will adjust it’s position so that when the crown is turned, the position of the hands can be adjusted. The keyless mechanism is made up of several components… The Stem The Sliding Clutch The Winding Pinion The Yoke The Yoke Spring The Setting Lever The Setting Lever Screw The Setting Lever Spring The Setting Lever and Screw work together to clamp the stem in place so that it does not fall out of the watch when the user pulls the crown out. The setting lever is also machined with specific angles so that when the crown is pulled to the second (hand setting) position, it will press against the Yoke and shift it’s position. When the watch is assembled the Sliding Clutch, which has a square hole, is installed onto a square shaft which is machined onto a portion of the Stem. The Winding Pinion is also installed onto the stem and works together with the sliding clutch if the crown is pressed in. As the Yoke is shifted by the Setting Lever, it will move the Sliding Clutch up or down the stem depending on wether the crown is pulled out or pushed back in. The Sliding Clutch has a set of teeth on each end. One set of will interface with the Winding pinion so that when the crown is turned, the Sliding Clutch will force the Winding Pinion to turn. This in turn will wind the mainspring via the Crown Wheel and the Ratchet Wheel. On the opposite side of the Sliding Clutch are a different set of teeth and these will interface with the Motion Work via an Intermediate Wheel when the crown is pulled out to the hand setting position.  A spring called the Yoke Spring will cause the Yoke, and therefore the Sliding Clutch to return to its original position when the crown is pressed back in. Finally, the Setting Lever Spring allows the keyless mechanism to stay in the desired position by applying tension to the Setting Lever
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