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Step 3Drill the shaft hole
After you cut them out, stack them up and use a drill to make the shaft hole. You can do this individually or all at once if you have a drill press and a really long drill bit. You don't need to be super accurate at all really since the turbine turns slowly and you will be grinding away a lot of material later on.
I used a 1/4 inch drill bit since I used 1/4 inch thread stock for the shaft. However, in retrospect I could have used a larger drill bit (1/2 inch or so) for the same shaft since the layers are compressed together with the end nuts. This would allow for easier re-alignment of the shaft had I poorly drilled my hole to begin with.
I used a 1/4 inch drill bit since I used 1/4 inch thread stock for the shaft. However, in retrospect I could have used a larger drill bit (1/2 inch or so) for the same shaft since the layers are compressed together with the end nuts. This would allow for easier re-alignment of the shaft had I poorly drilled my hole to begin with.
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