your Arbor to your generator shaft.
This is the way I do it. It does not mean it is right, nor
does it mean this is the only way.
This is not a guarantee that your arbor will never come off, but it
On a DC motor this is what I do.
- Push the arbor over the generator shaft as far as it will
go. Tighten the setscrews down.
- Now loosen the screws and remove the arbor from the
You should be able to see where the setscrews dug into the
shaft on the generator.
- On the generator shaft make a mark on each side with a
marker or pencil that you can easily see.
- Now set a block of wood or something on each side of the
generator to hold it still. Hook some DC power to it, 6
to 12 Volts is just fine.
- Now your shaft is turning and you should be able to see
your marks. If not unhook the power and re-mark
so that you can see them when it is turning.
- Now take a file, mini grinder, etc. and run it
"between" the marks to cut a smooth groove in
the generator shaft. It only needs to be about a 1/16th of
an inch or so deep. The point is to make a grove for
the head of the setscrews to set.
- Now unhook the DC power and inspect your shaft.
You should have two smooth grooves. If so you are
ready to mount your arbor.
- Remove the setscrews completely from the arbor.
- Place a drop of locktite on each setscrew and reinsert
them in the arbor shaft.
- Place the arbor back on your generator shaft all the way and tighten the setscrews down.
- Loosen one and re-tighten it, now loosen and re-tighten
the other one. This lets them dig in real good.
- Your arbor shouldn't be able to come off.
- Some people drill through the arbor and generator shaft
and insert a roll pin in the hole. Some say it
weakens the shaft, others say it a great idea. I
personally have not used the roll pin method and tend to
agree with those that say it weakens the shaft.
You may have an idea other than what I
mentioned, feel free to build your generator the way you want
to. If you have a better idea please send it to me and I
will post it to share with the other home brew builders.
You will receive full credit for your ideas submitted.
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