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.
Rockoonz: Hey hillquist I need the drum and clutch from the feed on a hilquist 24 inch saw.
Oct 23, 2014 23:41:03 GMT -5
drocknut: That's ok let em give me grief I got the rock so I'm happy.
Oct 24, 2014 20:48:50 GMT -5
wampidy: Grief? ? ? I aint givin ya no grief. I been givin ya humor. Did ya see where I said "she found it fair and square"? If that is grief what I give next will drive you mad as a hatter ya little squirt.
Oct 24, 2014 21:44:24 GMT -5
broseph82: Anyone with any extra arbors with hoods theyd like to get rid of on the cheap for a member? PM me please. thanks!
Oct 27, 2014 10:31:44 GMT -5
broseph82: Ill be slabbing some new BIG rocks today at the lab. Hopefully two of them produce some Paint Rock agate
Oct 27, 2014 10:32:32 GMT -5
snowmom: love coming to this site every morning, coffee in hand, and seeing what everybody has been up to.
Oct 30, 2014 6:23:49 GMT -5
wampidy: snow, what a plain Jane you are. Don't you know that us "in" people have moved up to cappuccino by Folgers and coming here with coffee of any sort and NO cinnamon and brown sugar pop tarts, I think, is a sin or something sinister.
Oct 30, 2014 8:37:02 GMT -5
wampidy: If I get up at my usual time, 4:30, we are here at the same time. Overslept today. Hmmmm the new cpap machine must be doing some good. I have not had this much energy in a long time. Catch 22, more energy, more doing, more back pain. Sucks but.............
Oct 30, 2014 8:43:22 GMT -5
snowmom: Jim, plain Jane plain black coffee... love that stuff. More energy good... naproxen works for me. Every day is a gift....
Oct 30, 2014 15:25:58 GMT -5
Fossilman: Black coffee,nothing better.................
Oct 31, 2014 10:03:45 GMT -5
mr.mohs: on the rocks!
Oct 31, 2014 10:10:00 GMT -5
rockpickerforever: Right back at ya, mohs! . I don't like blended because I hate brain freezes, and with on the rocks, I've got no blender to clean!
Oct 31, 2014 16:54:47 GMT -5
mr.mohs: Jean ya really got a try a blender full of margies with an egg white blended in...nofoooling...
Oct 31, 2014 19:22:35 GMT -5