disk grinder with removeable faces

[JTknives]

I am designing a disk grinder that will have removeable faces. so that you can have like 3 faces and have diffrent grits on each one and just swap out the faces. just seeing if people would be intersited in somthing like this. i am tired of wasting my 60 grit paper because i need to use 200 grit. now i can just swap out the faces and call it good. what do you think?

 

[Kevin Wilkins]

If you can actually make that work, you might want to keep the details a secret until you have protected the idea as it would have commercial potential.

To be honest, I am skeptical. There are a lot of flatness and safety issues to overcome whereas the cost of the paper is fairly low.

But hey, best wishes for success, it will be cool if you can make it happen!!

 

[SteelSlaver]

I already have a commercial disk for my 4 1/2" grinder that lets me remove a thin center nut and replace the sandpaper disk with another piece of sandpaper. You need to use fairly thick backed sandpaper on this wheel. Remember these things are really going and can fling stuff apart, to the determent of anything nearby. I seldom use it on anything very fine as it is very easy to cause a gouge. It would be better to have a aluminum disks with glued on papers. They already make a variety of quick change nuts for grinders so you could have a bunch of disks and change them out quickly. I Seldom use these "quick change" nuts as they stick up aways.

 

[deker]

I don't use a disk grinder, but I think it's a cool idea anyways. I could see a couple ways of doing it, but NONE are cheap...I'm interested to see what you come up with.

-d

 

[AcridSaint]

I would think the easiest solution is just to swap the disks or have a double shafted motor with one on either side and a mount to turn it 180 degrees.

 

[richard j]

i made 2 disc sanders, a 12" and 6" that only take a few seconds to change. i'm planning on making another 12" for my 30 grit discs. for the mounting flange i get an old speaker with a good size magnet and remove it from the speaker. i then take the magnet apart. you end up with a washer and your flange. chuck it up on the post the magnet was slid over and face the large flat. then chuck it up so you can drill a hole for the shaft to fit. here is a pick of the backside to show how i made it. http://mysite.verizon.net/reswhz6f/id18.html i checked the face with a dial indicator and there is 0 runout and it runs smoothly.

 

[NickWheeler]

I don't know about keeping it a secret, there was an article in Knives Illustrated about 8 years ago that outlined this very thing in fine detail.

Basically the guy used a "base" disc, and had several other discs that fit onto it via precision dowel pins. He has several faces for different grits, as well as different hardnesses.

It's a neat idea.

 

[Michael Lovett]

I think it would be a great idea if it can be donein a precision manner. I just invested in five billet disk for my veri-Bur King. Got tired of changing paper when I'm on a roll!