| ▲ Mechanical |
Here's a simple rigid shaft coupler for a 12mm shaft, made from aluminium. I first bored the inside to an accurate sliding fit over the shaft, then split it and drilled/tapped the holes. Slight problem - the internal stresses in the metal caused the bore to close up, so I had to force the clamp apart slightly to actually get it over the shaft. This was done using two sets of opposing screws, shown in the third photo below.
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 Shows how the clamp is spread apart using both M5 (upper) and M4 (lower) screws. |
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| ▲ Mechanical |