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Ok I know what your thinking, it's a bit early for April fools day, or Ive come down with a bad case of redneck.

I made this for my own amusement, as I was asked if I could make a 24 volt ceiling fan for a resident of footrot flats. I said I was having trouble finding a treadmill motor and jokingly said I could make one out of a circular saw... he ran off and came back with a saw, me and my big mouth.

If you want to make a solar fan I suggest you have a look at my other instuctable , it will show you how to make a ceiling fan with a treadmill motor which is quiet and very efficient.

This fan runs on 24 volts but is quite noisy, not as efficient and looks something out of mad max, but you might like that.

Now why would I use a circular saw? Many AC tools have universal motors inside them, they are the motors with brushes inside. Universal motors will run happily on DC so of course if you reduce the voltage they will run slower. So you could use a number of different tools for this project, "router fan" was my next choice but I couldn't find one. You could also try an electric drill, sewing machine, angle grinder, even a vacuum cleaner motor.


Step 1: The Tear Down

You wont need too much stuff for this build.

  • circular saw
  • ceiling fan blades
  • solar power system 12 or 24volts.
  • DC speed controller is optional

After confirming that the saw did run, even though its quite noisy, I removed the guards and the blade. This is not hard to do only three or four screws , and I then removed the the retractable guard and spring.

<p>just wonderful any way The information was useful. Can you please send me calculation for what motor to be best suited to lift or move a load of 150 kgs. <a href="http://choosefan.com" rel="nofollow">choosefan.com</a></p>
<p>How hot does the motor run? Running 120v tools with too long an extension causes problems, so, I'm surprised that 24v can do this. But perhaps it is a matter of less load. Although I think that the saw blade is risky, it makes good showmanship! And 1 pic almost tells the story</p>
<p>It runs cool as its only drawing an amp or so and has only a small load on it. The saw is only pulling 40 watts flat out so it cant get hot.</p>
Well done! except that a ceiling fan is supposed to spin at around 300 to 1000rpm but a saw has a minimum speed of 3to 5000 rpms reaching up to a maximum of 13000rpm. Fan blades might not be able to tolerate the extra ordinary centripetal stress at such high speeds.
<p>As the fan now runs on 24 volts dc it will spin at 300 rpm maximum </p>
<p>Splatter your shirt and the blades with fake blood, put on a mean face, and re-take that first photo...</p><p><strong>;-)</strong></p>
<p>&quot;Cool&quot; build- pun intended. ☺</p>

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Bio: Fixer, Finder, Fabricator.
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