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.
Rockhobbit: Good morning peeps! Hope ya'll have a great day!!
Jul 20, 2014 9:05:52 GMT -5
rockin12thman: Hello all, I'm a rookie rockhound in Western Washington. If anyone has knowledge of prospecting sites in my neck of the woods, I'm all ears. lol I would love to find a geode!! Have a great day and happy hunting.
Jul 20, 2014 12:36:59 GMT -5
Fossilman: Lots of Washington people on here.....Welcome aboard....
Jul 20, 2014 16:11:15 GMT -5
thehp: Hello - the hp ( new guy to this board )Is there a preferred thread for introductions to the community, or dos folks just jump in when they have a question / comment / etc ?
Jul 20, 2014 17:17:06 GMT -5
rockpickerforever: Welcome! You may introduce yourself in the "Visitors and Members" section here link
Jul 20, 2014 17:50:19 GMT -5
1nickthegreek: Good morning RTH'ers!!!!!!!!
Jul 21, 2014 10:45:59 GMT -5
bonnielou: Very central new jersey. Enjoyed viewing rock/minerals pic that i could actually id as have same.
Jul 21, 2014 22:08:54 GMT -5
drocknut: Just stopped by to say hello.
Jul 22, 2014 13:55:57 GMT -5
Fossilman: Hi ya'.....
Jul 23, 2014 9:25:15 GMT -5
wampidy: Oh Hell. Just found out today that my son has to have a major surgery (10 to 12 hours) on his leg that was crushed. The first surgeon screwed up and one break has been healing but not together. They have to grind the bone and start over plus take all the
Jul 23, 2014 17:29:05 GMT -5
wampidy: old hardware out that is in there. Lump on the front of his leg is the muscle coming through the sack to the outside under the skin. This doc told him it was going to be hell and he will be in the hospital for a week but he will shoot hoops when he is heal
Jul 23, 2014 17:32:05 GMT -5