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Thread: Shop built Oscillating spindle sander

  1. #1
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    Jul 2009
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    Shop built Oscillating spindle sander

    I decided I didn't like the spindle sander I build a few years ago, that one was built in a bit of a hurry out of a small drill press, so I decided to start from scratch. I dont have any build pictures to show the process but its pretty straight forward. I started with an I beam shape made of plywood, on one side I mounted 3/4" bore pillow block bearings to hold the arbor. The arbor is 3/4" cold rolled bar stock that I cut bolt threads onto the end. On the other side of the I beam I mounted the motor, there is a slot through the I beam so the belt can go between the motor and arbor. The whole plywood I beam assembly is mounted to the frame of the machine with ball bearing drawer slides. I got 4 slides and added the ball cages and bearings from the 2 extra slides. That makes the slides more rigid. I used a small gear motor for the oscillation, there is a small crank arm on the shaft of the gear motor, and a rod goes from the crank arm to a stud on the I beam. There are ball bearings on both ends of the rod to reduce friction and let the gear motor work more easily. I also added a spring that helps to hold the weight of the motor and arbor. I used an extra piece of plastic covered mdf for the table of the sander and devised a "zero" clearance insert for the different sized drums. This machine will handle rubber drums from 1" up to 4" in diameter and 9" tall. I can also stick 3/4" sanding sleeves right on the arbor. I have a 4" dust port on the machine and it does a really good job. I left an extra 1/4" all the way around on the zero clearance inserts to help with the dust collection and it works well, I guess they are not really zero clearance inserts then, maybe 1/4" clearance inserts? For some reason the image uploader rotated the pics all wrong, sorry
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  2. #2
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    Delton, Michigan
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    can you explain how the oscillation works a bit more? and how do you get the different drums to fit on a 3/4" shaft? i have toyed with the idea of making a edge sander but just havnt got started
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  3. #3
    Join Date
    May 2007
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    Kansas City, Missouri
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    Nice job Dave! Would also love to see some additional pics of the internals.

    BTW...looked for options to rotate your pics, but the forum software doesn't have that option.
    Darren

    To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault

  4. #4
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    You can tell by the pictures it is not boughten, just plain looks too nice. Yep, I could make one go round but I don't get the up and down part....
    "We the People ......"

  5. #5
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    I took some more pics to help explain how it works. Once again the image uploader rotated the pics. The oscillation works more or less the same as a gas engine. The gear motor with the arm on the shaft acts like the crankshaft, the piece between "crankshaft" and the bolt near the v belt acts as a piston rod and the "carriage" with the main motor and arbor acts as the piston. The rubber drums I bought all have 3/4" bore so all I have to do to switch the drums is loosen the nut and slide the rubber drum and sanding sleeve off the arbor.
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  6. #6
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    Quote Originally Posted by Darren Wright View Post
    BTW...looked for options to rotate your pics, but the forum software doesn't have that option.
    the pics are right side up on my computer, but when I upload them they all turn...

  7. #7
    Join Date
    Oct 2006
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    Quote Originally Posted by Dave Black View Post
    the pics are right side up on my computer, but when I upload them they all turn...
    You need to turn your computer sideways before you upload the pics.

    Seriously, not sure why that's happening. I've not been able to reproduce the problem. Great-looking sander, though.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  8. #8
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    Nov 2006
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    vaughn the only time i have seen this act like that was when the pictures were turned in picture viewer and then doesnt hold the rotation.. but if rotated in PS and resaved they do. thanks for the additional info dave on your sander.. where did you find a source for the rubber drums?
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  9. #9
    Join Date
    Nov 2006
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    London, Ontario
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    Quote Originally Posted by larry merlau View Post
    vaughn the only time i have seen this act like that was when the pictures were turned in picture viewer and then doesnt hold the rotation.. but if rotated in PS and resaved they do.
    Ditto.

    Are you on a Mac and using Preview to rotate the photos? I've had similar things in the past, so I never use Preview to rotate. I always pull up Gimp. I expect any other image editor will do it.
    There's usually more than one way to do it...
    www.wordsnwood.com ........ facebook.com/wordsnwood

  10. #10
    Join Date
    Feb 2008
    Location
    S E Washington State
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    Yes thanks for the info. That doesn't need a very big motor does it? Would it be of any benefit to have variable speed on that type of sander?
    "We the People ......"

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