One of these should be easy to replicate:
http://www.dickblick.com/products/logan-precision-sander-elite/?wmcp=amazon&wmcid=feeds&wmckw=17187-1001
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| Anyone know how to make a hand powered disk sander? http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=34585 |
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| Author: | Beth Mayer [ Thu Dec 15, 2011 9:59 pm ] |
| Post subject: | Anyone know how to make a hand powered disk sander? |
I'm improving, but I still give myself the occasional extreme manicure on the disk sander. I wish I had a hand powered one ( to use for the really little things) like the one on alberidesigns.com, but am not willing to spend $650 (or anywhere near that) for it. Has anyone made something like that? you'd need a machined flat disk, but I can't see that the parts would cost very much or that the engineering would be very complex. If you've made one, I'd love to hear how, and see a couple pictures. Thanks, Beth |
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| Author: | Dave Fifield [ Thu Dec 15, 2011 10:08 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Beth, you want to give us a URL for that? The website name you have above doesn't exist.... Dave F. |
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| Author: | Mark Fogleman [ Thu Dec 15, 2011 10:19 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
One of these should be easy to replicate: http://www.dickblick.com/products/logan-precision-sander-elite/?wmcp=amazon&wmcid=feeds&wmckw=17187-1001
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| Author: | Beth Mayer [ Thu Dec 15, 2011 10:21 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Jeez, I hope I usually have better attention to detail than that....it is Albertidesign.com. Thanks for the head's up! 
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| Author: | Beth Mayer [ Thu Dec 15, 2011 10:26 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
I hadn't seen that Logan precision sander. Could MDF be used to make the disk? The rest of the design seems pretty straightforward |
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| Author: | unkabob [ Thu Dec 15, 2011 11:07 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Beth: I think that I bought my sanding disk at Sears. It connects to a quarter horse motor shaft using a connector. You could start there and build up whatever you need. Bob 
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| Author: | WaddyThomson [ Thu Dec 15, 2011 11:10 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Their website is going through some changes, but Gilbert of Gilbert Tuning Machines, has a 5" disk sander for use on a drill press that is a very good thickness sander. I use mine all the time for backs, sides, fingerboards, purflings, bindings, etc. It does take a good set up and a drill press table of some description is necessary. The sanding disk is about $50 and has a 1/2" arbor, and the disk is about 1" thick and pretty heavy, which helps keep it smooth when sanding. |
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| Author: | David Malicky [ Fri Dec 16, 2011 3:14 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Usually, I find that a precision hub is the most important part for something like this: secure, big enough, and ~no wobble. Cast-iron pulleys make good ~precision hubs: https://www.surpluscenter.com/sort.asp? ... ELEN=10000 Or sprockets. Pillow blocks are easy as they self-align and lock to the shaft: https://www.surpluscenter.com/sort.asp? ... ELEN=10000 Or bronze flanged bearings, if aligned: http://www.mcmaster.com/#bronze-sleeve-bearings/=fdtuji Or I've superglued ball bearings into BB-ply holes, with superglue to the shaft, too. An MDF disc could be attached to the hub with machine screws tapped into the hub, or epoxy (though screws let you replace it easily). If the MDF disc isn't much bigger than the hub, it should stay flat during humidity swings. Hmm, I may make one, too! |
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| Author: | Beth Mayer [ Fri Dec 16, 2011 9:39 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Thanks All, David, those ideas and links are great, and just what I needed. I want to make this for situations where the workpiece is really small, or I want a more controlled removal of stock. I have 2 bench sanders, but they aren't always safe or convenient for an application. |
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| Author: | Corky Long [ Fri Dec 16, 2011 10:06 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
david82282 wrote: Usually, I find that a precision hub is the most important part for something like this: secure, big enough, and ~no wobble. Cast-iron pulleys make good ~precision hubs: https://www.surpluscenter.com/sort.asp? ... ELEN=10000 Or sprockets. Pillow blocks are easy as they self-align and lock to the shaft: https://www.surpluscenter.com/sort.asp? ... ELEN=10000 Or bronze flanged bearings, if aligned: http://www.mcmaster.com/#bronze-sleeve-bearings/=fdtuji Or I've superglued ball bearings into BB-ply holes, with superglue to the shaft, too. An MDF disc could be attached to the hub with machine screws tapped into the hub, or epoxy (though screws let you replace it easily). If the MDF disc isn't much bigger than the hub, it should stay flat during humidity swings. Hmm, I may make one, too! Oh, man! Now, you've done it, David.... Those are some really interesting links. I think I'm sucked into another project.. Thanks alot!  
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| Author: | Tony_in_NYC [ Fri Dec 16, 2011 10:40 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Beth Mayer wrote: I'm improving, but I still give myself the occasional extreme manicure on the disk sander. I have no help to offer on this topic, but I do like the idea of "Extreme Manicures" as a TV show. dang. Now the producers of Survivor will steal that idea for sure. |
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| Author: | Fred Tellier [ Fri Dec 16, 2011 1:34 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
I already have one and so do most of us. For the delicate sanding jobs I use my 6x48 belt/10" disk sander by hand operation. I spin the disk by pushing the sanding belt with one hand while holding small parts with the other. Works well enough to get the job done. |
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| Author: | cphanna [ Fri Dec 16, 2011 2:36 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
I think Todd's got a really good idea here--I was on the verge of suggesting it and then I scrolled down and saw his post. Seems to me the advantage of a foot treadle sander is that you'd have both hands free to hold and guide the work piece. |
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| Author: | David Malicky [ Fri Dec 16, 2011 2:53 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Anytime, Corky! Anyone else want to join Projects Anonymous? Yes, Todd has a good point on having 2 hands free. For that and also a simpler build, one could mount the hub directly to this: https://www.surpluscenter.com/item.asp? ... e=electric But one would need to know how to safely wire a switch, and the capacitor probably needs a shroud. Is that RPM about right? Or for super light duty and slower rpm, there are these: (needs a shroud, and shaft probably has play): https://www.surpluscenter.com/item.asp? ... e=electric Too slow?: https://www.surpluscenter.com/item.asp? ... e=electric If too much play in the shaft, they might instead replace the hand crank via pulleys, though a faster motor would be better for a pulley drive. |
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| Author: | Beth Mayer [ Fri Dec 16, 2011 3:30 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
I love Todd's idea of a treadle - operated disk. Todd, what is the flywheel ? |
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| Author: | nyazzip [ Fri Dec 16, 2011 3:42 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
treadle.....>old bicycle i have kicking around....>hmmm 
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| Author: | cphanna [ Fri Dec 16, 2011 6:37 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Todd will probably answer with some pics as examples, but a flywheel is a larger, heavier wheel that you get going via your hand or foot treadle. The weight of the flywheel, once in motion, tends to keep it in motion. This energy is then transferred via a belt, rod, or shaft to your actual sanding disk. Think of a spinning wheel. The large wheel we normally associate with them is really a fly wheel that transfers energy to a small part of the device that twists and takes up the yarn. Or google up "great wheel lathe" and you will see examples. Flywheels don't have to be big, but they need to be heavier and more massive than the working part of the machine. |
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| Author: | crazicarl [ Mon Dec 19, 2011 3:16 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Fred: That's a great idea. If the belt sander is already set up for a disc, just pulling the belt would do it. It's not the sander cares whether it's turned on when it moves. Clever. |
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| Author: | nickton [ Mon Dec 19, 2011 8:41 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
If I had $650 to spend I'd think about getting a drum sander first. Just my 2 cents. |
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| Author: | David Malicky [ Tue Dec 20, 2011 1:10 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
An automotive brake disk makes a good flywheel--balanced, the mass is near the perimeter, and free from most any repair shop. |
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| Author: | Arnt Rian [ Tue Dec 20, 2011 5:00 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
If the goal is to save your fingertips, I can's see how a hand (or foot) powered sander is going to accomplish that. If it is powerful enough to be useful for the tasks we commonly use these things for, it will certainly have the capacity to give your nails a 'makeover', and then some. I think it is a better idea to devise holders and jigs that keep your fingers away from the disk (or belt), and get spend the money on a better machine. In my experience, generally bigger is better, as it is more stable, the abrasive stays cooler, and it is useful for more tasks. It's probably also easier to concentrate on the task at hand if you don't have do double duty as motor. I've shown this picture here before, but here's my nut holder / fingertip saver. I've got others for similar specialized tasks 
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| Author: | Beth Mayer [ Tue Dec 20, 2011 8:15 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
I do agree for the most part, Arnt, and I do have excellent 6 x 10 AND 4 x 6 Rikon belt/disk sanders. The other issue though, is how aggressively they remove ALL material (not just my fingernails). For some tasks (admittedly, not many) I would like a slow and more controlled removal. Like all things luthiery, I suppose there is a learning curve to the fine use of aggressive power tools, and maybe I won't need to worry about this as much as I get more experience (I never used a belt sander or any large power tool prior to 2 years ago). Thanks for all the replies. I appreciate the discussion. Beth |
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| Author: | woody b [ Tue Dec 20, 2011 9:21 am ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
Beth Mayer wrote: I do agree for the most part, Arnt, and I do have excellent 6 x 10 AND 4 x 6 Rikon belt/disk sanders. The other issue though, is how aggressively they remove ALL material (not just my fingernails). For some tasks (admittedly, not many) I would like a slow and more controlled removal. Like all things luthiery, I suppose there is a learning curve to the fine use of aggressive power tools, and maybe I won't need to worry about this as much as I get more experience (I never used a belt sander or any large power tool prior to 2 years ago). Thanks for all the replies. I appreciate the discussion. Beth Would a router speed controller work on a disc sander??? I do way too much stuff by hand because my disc sander is too agressive. I'll try a speed controller on it later today. |
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| Author: | David Malicky [ Tue Dec 20, 2011 4:23 pm ] |
| Post subject: | Re: Anyone know how to make a hand powered disk sander? |
A router speed control only works with "Universal" motors (the loud, high speed kind in shopvacs, portable power tools, etc). A standard AC induction motor (the smooth and quiet kind), if single phase, can only run at the speed it's design for. One idea for smaller parts: attach a small fine-grit disc to the center of the disc sander, then cut a matching hole in a full-size coarser-grit disc to surround it. Or simpler, grind some steel on your regular disc, but only near the center. The grit near the center is also moving slower than the periphery -- built-in speed control. |
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