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DIY high speed rotary tool

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    KillYrTV started this thread.
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    DIY high speed rotary tool

    My next project is making my own rotary tool out of an electric hand mixer. Even just the aluminum fan in the mixer cuts deep into wood and plastic with no problem, and has a 5 speed switch built in. The fan in the mixer is connected directly to the motor, on a worm gear shaft that turns the gears that spin the beaters. If I attach a circular blade on the shaft the fan is on, it would spin about 15-20 times faster than the beaters would.



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    It sounds like a real finger chopper/trimmer to me without the proper guards.
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    Quote Originally Posted by Mechanic688 View Post
    It sounds like a real finger chopper/trimmer to me without the proper guards.

    Not a problem his projects never make it beyond the drawing board.

    Using an aluminum fan blade spinning at high speed as a chopper could be a real eye opener when one of the fins breaks off hitting him in an eye.
    Last edited by alloy2; 01-20-2016 at 12:57 AM.
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    Several company’s manufacture flex shafts that adapt easily to various electric motors the small tools and drill bits require some serious RPM the perfect candidate here would be a high speed vacuum motor that cranks out a whooping 20.000 rpm. Since the vacuum motor is a brush type motor called a Universal motor a simple light dimmer switch would adjust the speed up or down.

    A foot pedal from an old electric sewing machine would probably serve two purposes, to control speed plus start and stop your motor leaving your hands free. The sewing machine motor may also be a candidate for the flex shaft adaption.

    If your carving stone wear breathing protection especially soapstone as it is also a carcinogenic

    Last edited by alloy2; 01-20-2016 at 01:02 PM.

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    I owned an old Kirby vaccum and one of the attachments was a flexable shaft that had a 4" buffing wheel. I think I have seen the flexable shafts at harbor freight as well. Mike
    "Profit begins when you buy NOT when you sell." {quote passed down to me from a wise man}

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    Wood spirits carved from pine and cedar knots are some of my favourite carvings.

    The knots which are the remnants of the tree limb are removed from a rotting log, pine and cedar are preferred.





    Some examples of wood spirits.

    How to find knots for carving your spirits.

    Last edited by alloy2; 01-20-2016 at 05:00 PM.

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  16. #9
    KillYrTV started this thread.
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    Quote Originally Posted by alloy2 View Post
    Not a problem his projects never make it beyond the drawing board.
    Don't gotta be rude about it, here is one that did get beyond the drawing board: http://www.scrapmetalforum.com/made-...ow-shovel.html

    Also there are many little projects I don't post here. https://www.facebook.com/killyrtv/po...98?pnref=story

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    Quote Originally Posted by KillYrTV View Post
    Don't gotta be rude about it, here is one that did get beyond the drawing board: http://www.scrapmetalforum.com/made-...ow-shovel.html

    Also there are many little projects I don't post here. https://www.facebook.com/killyrtv/po...98?pnref=story
    Not intended to be rude, just pointing out the obvious.

    You post a DIY project with no follow ups

    The snow shovel was a great idea, shows your a creative thinker however your choice to use ABS plastic was a poor choice for this project it becomes brittle in the cold prone to cracking leading to failure.

    A polypropylene plastic would have been a better choice.
    Last edited by alloy2; 01-22-2016 at 12:04 AM.

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    Quote Originally Posted by alloy2 View Post
    Not a problem his projects never make it beyond the drawing board.

    Using an aluminum fan blade spinning at high speed as a chopper could be a real eye opener when one of the fins breaks off hitting him in an eye.
    Most inventors successful inventions aren't the project they first conceived. Often a great invention comes from an offshoot of the original idea. It's trail and error, remade and refined.


    I didn't fail 200 times when inventing the lightbulb. I learned 200 ways that didn't work. - Thomas Edison

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  21. #12
    KillYrTV started this thread.
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    Hey you're right. The ABS plastic broke down, but not before it got the job done. Still intact, but cracking. I expected that, considering my goal was to use spare items on hand. Also the metal strip I added wore down as well. TBH, most of the time was spent picking through my drawers of screws to find the right bolts and nuts. If my goal was to have the best snow shovel, I would have just used the manufactured
    snow shovel in my closet.

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  23. #13
    KillYrTV started this thread.
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    Quote Originally Posted by alloy2 View Post
    Not a problem his projects never make it beyond the drawing board.

    Using an aluminum fan blade spinning at high speed as a chopper could be a real eye opener when one of the fins breaks off hitting him in an eye.
    You were also correct about this. The fan blade worked great for plastic and wood, but failed miserably when I tested it cutting metal, and broke a fin off. But I know the next fan blade I try will work great on plastic, better than a rotary tool.

    Last edited by KillYrTV; 01-22-2016 at 09:40 PM.

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