HS sanders are nice for sanding large pieces. I have used them for slabs, but when I do I sand 6 or so at a time, rotating through them before they get hot to avoid cracking. I ALWAYS hook it up to a vacuum to suck most of the dust up, and ALWAYS wear safety glasses and a dust mask. Also it's important to know what you're sanding, some rock dust is poisonous and the dry sanding doesn't work for everything. If you choose to build one they use a 3450 RPM motor, not the standard 1725RPM type.
bobby1 would be the one to talk to about dry sanding. I believe he dry sands most of his giant cabs using SiC belts. Following his advice when I was having trouble with scratches on just one portion of my cabs (every time), I started dry sanding mine with a well worn SiC belt and my scratch issue disappeared. You do have to be careful with heat and some stones just do not take to heat well but on those that do ok, it brings up a super shine. I found that it did not work on a couple of softer stones, they ended up kinda orange peeled from the heat.
Chasfire has one of Richardson's High Speed sanders, and you have all seen the killer polish he gets. Big material acts as its own heatsink, whilst thin slabs do not, so you have to be careful in not overheating them. Woody
Post by rockhound97058 on Mar 15, 2010 21:48:10 GMT -5
These sanders go work great. I've used one for 14 years and love it. It can be a little intimidating at times due to the sanding head right next to your fingers and in my case chest level. Also it takes time to get the feel of it. I used to use this for rough to fine grits, but now I strictly do my course sanding and finish up with a expando drum! I do small 1/4 stones up wards of huge pieces with this sander. I also do slabs by hand.
One thing though if you shred paper it can tear meat from your hand LOL.... Course grit paper just floats, however the fine grits are best glued onto the head. I personally never glue any of mine due to the mess and found the glue would create bumps under the paper.
The unit you linked to is a little rough looking, however still in usable material. I see the auction has ended - Great price for whoever bought it... These things run about $400 new right now
These sanders can build up heat, but the trick is keep moving and try not to bevel the edges with it. This machine works fantastic with agates, jaspers and more... However some thing it's terrible... Mexican Coconuts are a pain in the rear... best with wet drum.
Speaking of Richardsons... Bonnie called me yesterday and told me to pass the word they opened some of the beds for digging. Red Bed, Moss Bed and Pony Butte are open. Blue bed like every year is full of water and won't be open for another month or so.
Another quality posting by the Redheaded Rockhound! =) ~ Gotta lick those rocks to see if they shine!!
I have used this sander on agate and jaspers quite a bit. One thing to keep in mind is the temperature difference between cold rocks and the heat from the sander. The only time I have had a problem with heat is when the agate or jasper is real cold before sanding. I now warm the rock before I start sanding. I have even sanded a slab that was only 1/16" thick without cracking it.
mr.mohs: today turned into clean up day later edcrisp'n w/beef
Oct 11, 2014 12:17:31 GMT -5
drocknut: Haha Russ and Jean. Jim I'll bet you can try but my mom doesn't know where I stashed it. Mine, mine, mine...it's all mine!
Oct 12, 2014 14:54:11 GMT -5
drocknut: So sorry to hear about Ralph, prayers for you and your family Maryann.
Oct 12, 2014 14:55:06 GMT -5
wampidy: I was right, it is there. I will just get your mom out of the house, burn it down and dig through the ashes. Okay, maybe not but you better keep an eye on it. Another way would be to take your mother to dinner then excuse myself to go to the john.
Oct 12, 2014 21:06:46 GMT -5
wampidy: Damn that is one beautiful piece of the earth AND I DIDN'T EVEN GET TO HOLD IT. You were too smart for me. lol
Oct 12, 2014 21:07:58 GMT -5
hornseeker: Just plugged in my QT12 and am tumbling my first batch of rock!!!
Oct 12, 2014 22:50:06 GMT -5
Fossilman: Slabbing rocks today.............
Oct 14, 2014 14:01:10 GMT -5
hornseeker: Wish I was...need a saw!!
Oct 14, 2014 14:44:09 GMT -5
drocknut: Lol, Jim. If I had let you hold it I would never have gotten it back. You did get to see it close up.
Oct 15, 2014 11:38:26 GMT -5
mr.mohs: cut it in half & share
Oct 15, 2014 20:34:58 GMT -5
wampidy: no no no I have no claim to it. She found it fair and square.
Oct 15, 2014 21:08:25 GMT -5
mr.mohs: o.k. I was just playing the role of the Judgment of Solomon...mostly
Oct 15, 2014 21:51:03 GMT -5
Shotgunner: You guys just stop bickering over a little blue rock. sheesh!!
Oct 18, 2014 12:00:43 GMT -5
mr.mohs: grinder where you taking us?
Oct 19, 2014 9:25:02 GMT -5
rocktard: OK, ....where is my listings, I tried to add my pictures using the add attachment, it kept on saying the file was to big.
Oct 19, 2014 9:32:00 GMT -5
kimx5: Need help..have done everything to the rule week after week ...just took stones out after polishing process ...they look lovely while wet but they lose their shine when they dry out ...what have I done wt
Oct 19, 2014 12:29:56 GMT -5
kimx5: Ooopppss. ?.what have I done wrong I was going to ask ?
Oct 19, 2014 12:31:59 GMT -5
Fossilman: kimx5-go to the "Total Rock Tumble" site on this forum,you will get tons of help there...Not many people visit the "shout" page....Thumbs up
Oct 20, 2014 9:36:32 GMT -5
mr.mohs: only the mostly...mostly
Oct 20, 2014 10:51:57 GMT -5
Fossilman: He said he would,I said he wouldn't,but they thought he did,it turned out,he could have..............LMAO
Oct 21, 2014 9:15:14 GMT -5