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Posted (edited)
On 4/2/2024 at 8:02 AM, nevenbekriev said:

... For example, now I have an AP movement on my bench that needs to make new winding pinion and one of winding gears for it, this is for a young watchmaker that I am trying to teach and will not want to dissappoint him...

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The final result is not perfect looking, but is working well. The wheel is pritty small - the OD is 1.8mm

Edited by nevenbekriev
  • Like 5
  • nevenbekriev changed the title to Winding pinion making
Posted

This is the 3th attempt for this specific pinion. Othervice I have made many for pocket watches, but they are much bigger. This is really small. The pictures does'n t show things correctly, there are blinks that my phone camera can't manage well

  • Like 3
Posted
1 hour ago, Neverenoughwatches said:

Thats insane Nev that you cut those tiny pinion teeth with a cutter you designed and made. 

In that case the angle is not quite right between the cutting face of a cutting tool and the surface of the work back of the tool.

Posted
1 hour ago, oldhippy said:

In that case the angle is not quite right between the cutting face of a cutting tool and the surface of the work back of the tool.

Onlly a pro's eye would notice that OH, you've still got it old fella 🙂

Posted
11 hours ago, oldhippy said:

In that case the angle is not quite right between the cutting face of a cutting tool and the surface of the work back of the tool.

This is a flying cutter, usual one. The cutter itself is shown in the pictures in the first message, it is made of broken tungsten carbide drill bit. I asure that all the angles of the cutter are as they should be. I have video - little older one - that I made when onse making the same kind of winding pinion for a Poljot 2200, which is even smaller than this one.

It is not easy to see in the video, but the tool rest moves about 1mm towards the object in Y direction and then returns back untill cutter is rotating. Then the spindle is rotated one tooth ahead and everything repeated untill all teeth are cut.

Posted

The video doesn't help me. What lathe are you using and is it true. To be fair to you I don't think I can help certainly not by looking at a video, I need to be their. Have you tried another cutter?  

Posted

OH, I don't need help. The pinion works fine and so I am happy with the result. This is just my 'shy' way to bragg with what I have done... And to show that it is possible to make such parts with self made tools and devices in domestic conditions

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