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National Electric Watch Cleaning Machine


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When I said that I was waiting for the puller I actually got it already I just did not notice it on the ground in front of the entrance door. I have replaced the ball bearing, twice actually because i forgot to add the dust cover first, not like it is needed now as the new ball bearing is double Z (closed both sides). Now you can see my first ever attempt to clean a watch with a watch cleaning machine. I used a movement which is not worth saving in my opinion for the test run, going to check the parts with my microscope but it looks promising. I used elma 1:9 pink milk solution for the first jar and filtered rain water for the 2nd and 3rd. I still need to work on the motor though, if i screw it down it slows down as something is too tight, its like a play with the balance end shake. Too lose at the moment, it starts to shake too much with high speed because it is not screwed down properly. 

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Edited by luiazazrambo
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Stephen, the brushes look as though they still have plenty of meat on them. Have you had a look at the commutator? It may need cleaning. Have a look at this: m.youtube.com/watch?v=MkBLwUG_AdU

Thanks guys. Rather than getting new brushes I've just done as suggested and cleaned everything. Now working as good as new - well, as good as a decades old machine anyway. Pity the speed control no l

If the bush is sintered then it will hold lubricant inside the material.

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    • I bought this for my new watch bench. It is nice but because of the way you work on a watch bench, the lamp is mounted on the same plane as your work space (this is higher than if it were a typical work bench).  As a result, the lamp cannot pivot upward enough to get optimal positions. So, what I had to do was design and print an short extender that pushes the fulcrum of the lamp away from the manufactured pivot point.  This allows me more range of motion. I am pretty happy with how it turned out.
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    • Please keep us posted though. It's a beautiful clock and well worth a bit of time and effort to get it back to it's original glory. Good luck!
    • Did a bit more today on my Hettich. I also mucked around with practising on the top plate from the second Hettich that I bought. The calico wheel can leave marks and I am being gentle. I am certainly not pushing the plate into the wheel. I could easily stall the bench grinder that I am polishing on. I am wondering if Hettich started to use a lower grade of brass? I still cannot polish the brass to a mirror finish. On my Hettich (older) I have had to emery one of the posts that supports the movement and after 600 grit then 1500 grit, straight to Tripoli on my stitched wheel, then green on the calico wheel and the post is spotless. Absolutely gleams. post has a steel nut on the top of it that was rusty and affected by the battery acid. It is now polished as best as can be done and then I mucked around with a bit of heat and have changed the colour of the nut which looks quite good now. It was black originally. I have done several jobs now by hand where a having a lathe would have been so much quicker. Have to get rid of the Esprit first. Then I might have a chance.
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