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Automatic Watch Winder DIY

2009-Oct-10
 
Universal Joint

The Universal Joint is for connecting the motor and the axle of the watch cage.

I bought it from a R/C modeling shop rather than the URL shown in the photo.

Price : HK$ 35

Universal Joint

After testing, I only use the parts within the red line.

If you would like to save the money, you can install the axle of the motor on the same axle of the watch cage. However, use an Universal Joint can improve the smoothness of the turning of the watch cage.

Motor with gear box

This is a d.c. motor with a gear box, its speed is about 12 RPM under 6V.

For most automatic watches without wearing, about 500 rotations per day is required to keep it from stop; Therefore, run the watch winder for about 40 minutes is O.K.

However, some rotors of the watches only winding in one direction, if you do not sure, you can run the watch winder for about 30 minutes on each direction, total 60 minutes.

The motor draw 0.025 A , 6V without load.

It is small but powerful, you can see the performance later.

Price : HK$ 48

Parts

These parts can be bought from R/C modeling shop, 2 rings were stuck together for connecting the axles.

Price : HK$ 15

Switch and Socket

Left : Switch
Price : HK$ 7.5

Right : Power Supply Socket
Old parts, Price : none

Switch

The direction of rotation of the watch winder can be changed from this switch.

If you do not have knowledge of electronic circuitry, show the photos when you buy the parts and ask the staff to teach you how to connect.

Different parts can have the same functions, make sure you know how to connect them together properly.

Watch Winder Circuit
Click to enlarge

Form

For holding the watches securely without scratches, you can use form rubber / sponge.

Price : HK$ 10

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