Saskrock
fully equipped rock polisher
Member since October 2007
Posts: 1,852
|
Post by Saskrock on Jul 4, 2008 15:17:21 GMT -5
This is just a post to save anyone else who gets this idea some time. I took a wore out tile blade and sprayed one side with spray adhesive. I then sprinkled Si carbide tumbling grit on it and shook off the excess. I let it dry then tried it out on the flat lap. It cut pretty well for about 30 sec then most of the grit had tore off. Maybe it would work if you had really strong glue?? Or you could do what I just did and order a diamond disk. Guess not every idea is a good one.
|
|
|
Post by deb193redux on Jul 4, 2008 16:54:54 GMT -5
Some diamond discs are made with an epoxy instead of electroplate or slintered bond, so some particular epoxy might be more suitable - but I agree the time and headach involved is hight compared to the relatively low cost of some diamond discs - especially sanding ones.
|
|
|
Post by docone31 on Aug 16, 2008 21:52:21 GMT -5
Discs, and wheels made with silicone are made with a powdered resin. This resin is heat, and pressure activated. Just glueing grit on anything is not going to do it for long. Now, on a tin lap, diamond powder is rolled into the lap. This is a completely different technique. Heads up for tryng though.
|
|
jimrbto
noticing nice landscape pebbles
Member since April 2007
Posts: 94
|
Post by jimrbto on Aug 17, 2008 8:35:06 GMT -5
Some grinding and sanding wheels are made with diamond powder and slow or heat cure epoxy with added fillers. So- if you use or can find the right epoxy there is no reason why it would not work. BUT - is it worth it? Jim
|
|
lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
|
Post by lparker on Aug 18, 2008 7:48:55 GMT -5
And another thing...I tried using SiC grit on plate glass to try and hand polish a slab - from coarse on up...never got further than the coarse...the grit (70/90) turned to mud after 5 minutes and I had to add more..an hour of that and not much progress...I quit. I suspect it would work much the same glued to a saw blade.
Lee
|
|
drjo
fully equipped rock polisher
Honduran Opal & DIY Nut
Member since May 2008
Posts: 1,581
|
Post by drjo on Aug 19, 2008 9:28:25 GMT -5
Use the saw blade as a backer for SiC sanding pads or paper too.
|
|
4cornersrocks
off to a rocking start
Member since August 2008
Posts: 21
|
Post by 4cornersrocks on Aug 22, 2008 20:56:06 GMT -5
Good idea... Try encasing the grit in epoxy.
|
|
cooknet
starting to spend too much on rocks
Member since February 2009
Posts: 169
|
Post by cooknet on Feb 24, 2009 17:33:49 GMT -5
So lemme get this straight, if you take an old round metal (or even wood or glass) disk, like a saw blade of any kind, mix coarse diamond grit with epoxy glue, like make a good thick paste with LOTS of grit in it, and spread it EVENLY on the wheel, when it dries, IF it adhears well to the metal disk's surface, you have yourself a "decent" diamond grit polishing wheel? Sounds like something I'd like to try since I have all the ingredients here already I was just wondering though, wouldn't the epoxy have to be such that it "wore off" easily "against" the stone as it spun, otherwise, it will "always" just "encase" the grit and never allow contact between the grit and the stone?? Thanks, chris
|
|
|
Post by akansan on Feb 24, 2009 17:47:19 GMT -5
Chris - take a look in the lapidary tips on resurfacing diamond wheels. There's a how-to involving epoxy and loose diamond grit that will probably help you.
|
|
cooknet
starting to spend too much on rocks
Member since February 2009
Posts: 169
|
Post by cooknet on Feb 24, 2009 18:58:47 GMT -5
Thanks akansan, I've posted there and pestered them now, hehe. Chris
|
|
docharber
has rocks in the head
Member since October 2008
Posts: 693
|
Post by docharber on Feb 25, 2009 21:24:23 GMT -5
Self adhering wet/dry SiC disks or auttomotive wet/dry SiC sandpaper might work (use the spray adhesive on the latter). Sp[ray adhesive is a gummy material that never dries and hardens completely. That's why it didn't hold. The Grit might work in an epoxy base, though. Can't hurt to try.
Mark H.
|
|