Winding pinion making

[nevenbekriev]

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...

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

Edited May 2 by nevenbekriev

[oldhippy]

Is this your first attempt, the teeth certainly need better cutting. Its a hell of a lot better then my first one.   

[nevenbekriev]

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

[oldhippy]

What cutter are you using can you video the action 

[Neverenoughwatches]

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

[oldhippy]

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.

[Neverenoughwatches]

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

[nevenbekriev]

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.

[oldhippy]

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?  

[nevenbekriev]

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

[oldhippy]

Good for you. It's always nice seeing members using their skills. I would still like to know the make of your lathe. 

[nevenbekriev]

It is one of these

https://www.mini-lathe.com

with 'Einhel MTB 3000' inscribtion on it