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Master craft spring winder NEW hook spring fitted

clockboy
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clockboy Distinguished Member

clockboy

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I have sang the praises of the Mastercraft watch mainspring Winder many times here. However one of the springs that hooks onto the mainspring broke and the spare winders hook was worn so I needed to replace. After a search on the net I found this company (UK) https://www.leespring.co.uk

Well worth a visit if you require a spring.This company has a comprehensive selection of springs by size a torque requirements.

This was my first attempt so don’t be to critical. I ordered a extension spring but in hind sight I should have ordered a Torsion spring which would have made the job a hole lot easier. However see pics.

8E5F1DE0-5BB6-413E-B9AD-FE52EDC5824C.thumb.jpeg.24c22b5e892ad8279cab2a167d49b0d6.jpeg

0309DE49-0BA0-40B5-880D-2A2A76C1A3D2.thumb.jpeg.274aea6fe2761207cbed27b22c3bd3a8.jpeg

New spring

356440BE-0E5A-4921-9C9D-2E50909484BE.thumb.jpeg.490749c3198674184b81bde361ce1f98.jpeg

The cutter I used

1A63DF5A-AD7D-4F77-ADD6-8EC3F1EE0BE5.thumb.jpeg.7d17cf73fd9584e92c41d47e60670d63.jpeg

This is how the end hook was created. Held with a cocktail stick and the end pressed into my wood bench with an old screwdriver.

CF70EDB2-0338-4D8E-8CE8-C90AF92EABAE.thumb.jpeg.49e4e3e8dc984ec58db38d3d499b443b.jpeg

I found this the best tool for screwing the new spring onto the shaft.

B4F553FC-4E4C-4D54-B375-E265E8F1C39B.thumb.jpeg.81801edd8dd37d5dbeb8e1d117ff1deb.jpeg

Finished job. The spring is a touch to short but should work.

 

1C127B49-34C8-4B82-929F-E6E7AF81CA1E.jpeg

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