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Automatic mainspring slipping end repair

jackie01
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jackie01 Member

jackie01

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Posted (edited)

Hello,

I want ot show you my way to repair broken slipping end of the automatic mainspring. 

1. Firstly I drilled mainspring and slipping end with 0,3mm driller.

IMG_20191001_232128.thumb.jpg.e254c1a34ec3a7b22efc3c96f641f3c3.jpg

2. I made the rivet

 IMG_20191001_232428.thumb.jpg.687d45220c2b2e8ddfed3c17d3b68a1c.jpg

3. Mainspring and end riveted

IMG_20191001_232528.thumb.jpg.cedb0e2848322646c347ed85fef32511.jpg

4. Clinching the rivet with pliers

IMG_20191001_232606.thumb.jpg.f0f77b7bae8697b49dd81b20e5dfc282.jpg

 

5. Rivet grinding with file and water paper

IMG_20191001_233242.thumb.jpg.c6d23cfe87fec7b1524c85d44dc9bf3b.jpg

 

IMG_20191001_233254.thumb.jpg.6139a4a4254af4d92c146ef195c4f44c.jpg

 

6. Mainspring installed in barrel

IMG_20191001_234505.thumb.jpg.b895e03bae6faebf700fb22824338b73.jpg

 

7. Completed. I have checked if it works well. I have 9 full turns of arbor before mainspring starts to slip at the barrel wall. I think it is quite good. Some service manual says that 8,5 turns is a good result.

IMG_20191002_000205.jpg

 

What do you think - is it good way to repair this malfunction? 

 

Edited by jackie01
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