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View Full Version : sanding sides on the cheap and easy



fungusgeek
08-28-2014, 09:43 AM
I took an old cheap lathe head, a couple of faceplates, some heavy particle board, an old electric motor, and made a setup to power sand the sides before gluing on the top and back. To slow the sanding plate down to a reasonable speed, I cut a V grove around the edge of the sanding disk, and run a V-belt through this. Works like a champ. I made both a flat disk and a radius disk for sanding the back profile.

Also, since I am just building ukes and not guitars, I found that you can get 17" sanding disks in a number of grits (they are used for wood floor refinishing) from the rental tool place for only a few dollars and not the very pricy disks from Stew Mac, LMI, etc.

I just clamp the sides in the mold, hold them up against the disk, and things are sanded perfectly in only a minute or two. Takes longer to set things up outside (there is a bit of a dust issue).

Michael N.
08-28-2014, 09:55 AM
That doesn't look safe to use at all.

ericchico
08-28-2014, 10:22 AM
Thats cool. You could flip it so its laying flat and build it into a table top with a dust port on the edge to catch all the lung gunk. As far as safe, what is? My daughters legos lying around in the middle of the night are death traps. I love home made machinery

dofthesea
08-28-2014, 05:13 PM
Where there is a will there is a way. Have to admire his ingenuity.

tangimango
08-29-2014, 01:56 AM
Alomst like a pottery wheel

thistle3585
08-29-2014, 02:52 AM
Why did you choose to run the belt around the perimeter of the dish instead of the gears on the back? I'd think you could get down to 880-1000 RPM with those gears.

Sven
08-29-2014, 02:59 AM
Ha ha ha, I thought you meant that thistle.

thistle3585
08-29-2014, 03:05 AM
I did. I was guessing 800-1000 RPM because that's what a buffer runs at. I just searched and saw where disc sanders are at 1700 RPM. BTW, you can by large disc sanding sheets at woodworking stores without the hole in the center.

Sven
08-29-2014, 03:56 AM
I wouldn't want that large particle board spinning at that speed. And you wrote "get down" but changing to a smaller diameter on the driven wheel would make it spin a lot faster than it will when it's driven on the perimeter.

ksquine
08-29-2014, 04:47 AM
Nice idea but I agree that it isn't safe. You could easily get a finger caught in that belt while using it. The pinch point is right where you'll be holding the mold. One slip of the mold and you might have a broken finger or sprained wrist
Definitely needs a finger guard.

Moore Bettah Ukuleles
08-29-2014, 06:55 AM
If you mounted it horizontally it wouldn't be hard to hard to make a belt guard by boxing in the belt and pulley. You really need to think about safety when using such a piece if equipment. It's hard to build or play when your missing a couple of fingers, not to mention your eyes. And you really don't need or want more than a couple a hundred RPM. That's the highest speed of my potter's wheel and it works dandy.

Michael N.
08-29-2014, 08:14 AM
Nice idea but I agree that it isn't safe. You could easily get a finger caught in that belt while using it. The pinch point is right where you'll be holding the mold. One slip of the mold and you might have a broken finger or sprained wrist
Definitely needs a finger guard.

Yes but you do know that it's possible to trip over a match stick, roll down the stairs and be perfectly OK. Only to walk outside , get stung by a few hundred hornets and die!!!
Why on earth do we, governments, companies, individuals bother with this safety rubbish!!!!

Flyfish57
08-29-2014, 09:02 AM
Yes but you do know that it's possible to trip over a match stick, roll down the stairs and be perfectly OK. Only to walk outside , get stung by a few hundred hornets and die!!!
Why on earth do we, governments, companies, individuals bother with this safety rubbish!!!!

That could possibly happen, but why tempt fate!

Matt Clara
08-29-2014, 04:18 PM
Yes but you do know that it's possible to trip over a match stick, roll down the stairs and be perfectly OK. Only to walk outside , get stung by a few hundred hornets and die!!!
Why on earth do we, governments, companies, individuals bother with this safety rubbish!!!!

I...wait, what?!

ksquine
08-30-2014, 04:20 AM
Yes but you do know that it's possible to trip over a match stick, roll down the stairs and be perfectly OK. Only to walk outside , get stung by a few hundred hornets and die!!!
Why on earth do we, governments, companies, individuals bother with this safety rubbish!!!!

Yeah....nevermind. Might as well strip off the insulation on the motor wiring too. Its just adding extra weight and cost

Michael N.
08-30-2014, 09:27 PM
Whooooshhh !!!

Ron B
09-01-2014, 07:09 AM
Nicely made, but why not put a little time into making it safer. A guard for the belt could also be part of a dust shroud. If you're going to breathe all that dust, you'll need all of your fingers for picking your nose.

tobinsuke
09-01-2014, 09:39 AM
Whooooshhh !!!

It's an unfortunate fact that ironic intent doesn't always come across as intended on forum posts :)