Jérôme» coca cola shim http://www.jeromedemers.com/blog Half robot, half g33k. Mon, 19 Sep 2011 13:48:09 +0000 en hourly 1 http://wordpress.org/?v=3.3 Making a shim for the motor shaft http://www.jeromedemers.com/blog/2009/07/making-a-shim-for-the-motor-shaft/ http://www.jeromedemers.com/blog/2009/07/making-a-shim-for-the-motor-shaft/#comments Wed, 08 Jul 2009 19:13:42 +0000 Jerome http://www.jeromedemers.com/blog/?p=192 When I inserted the pulley on the motor shaft, there was some little side mouvement. It was not extremely major but I found this simple solution that could of fix this problem fast and it was free.

This sort of slack was due to me machining of the motor shaft. The “D” slot ( D-bore) was the problem.

The solution was to make a shim to go between the shaft and the belt pulley to prevent the mouvement.

motor_shim_shaft_ 001

The coke can makes perfect shim. It measure 0.0035″ ( 0.09mm)

motor_shim_shaft_ 002Very easy to cut and make the shape you want.

motor_shim_shaft_ 004

Making a triangle helps to insert the shim under the belt pulley.

motor_shim_shaft_ 005

motor_shim_shaft_ 006

With this solution, I was able to remove the slack in the belt pulley and the shaft. After a couple of hours on the scooter, I saw the shim disintegrated or simply not there when I remove the pulley from the shaft. It does work for a certain amount of time. The shim took the same colours has the shaft and was extremelly hard to see.

The first time I did not see it and the second time I removed the pulley from the shaft,  it was there but hard to see.

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