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.
snowmom: stonewhisper, have a great vacation thanks for the link!
Aug 13, 2014 18:59:24 GMT -5
PurplPixie: Anyone know of people who buy lapidary rough collections in Oregon?
Aug 15, 2014 15:12:54 GMT -5
1derwoman: I wished I could wear the outfit but bigwigs at the hospital where I work would frown. I hope this post works if not I will have to call Ann or any of the teenagers I know for tech support.
Aug 15, 2014 15:20:03 GMT -5
Fossilman: Purplpixie,there are a lot of Oregon people that buy rough.....Sometimes whole collections,if the price is right..Just post it on the forum..
Aug 16, 2014 8:16:45 GMT -5
rockpickerforever: Another day of hot, sticky GA weather here in the southlands of CA. James, please take your weather back!!! I don't like it!
Aug 18, 2014 12:02:31 GMT -5
Fossilman: Getting that crap up here too,I'm staying in house,going to can tomatoes and dry some Habaneros...
Aug 18, 2014 12:22:46 GMT -5
snowmom: 57 degrees here last night 70 right now, mild wind from the nw, supposed to bring rain tonite, then days in the mid 70's until the weekend
Aug 18, 2014 16:21:41 GMT -5
bhiatt: I don't live all that far from the rioting. Around 20 miles. Getting crazy over there right now. Big crowd, tons of cops and reserves. Live action on the local news.
Aug 18, 2014 22:01:28 GMT -5
Fossilman: I'm sorry for a death of anyone,but that's not right,tearing up and looting your own town!!! The IDIOTS!! No logic at all!!
Aug 19, 2014 9:38:48 GMT -5
rockpickerforever: I understand a lot of the trouble is being caused by people from out of the area.
Aug 19, 2014 10:01:51 GMT -5
bhiatt: seen this morning a bunch of drug and gun arrests. One news guy was saying how it smelled of marijuana all over. Hate to say it but it will happen again tonight. A small percentage of ghetto thugs are the on trying to hype the crowd up. Bunch of bullchit.
Aug 19, 2014 11:54:10 GMT -5
wampidy: Too bad they can still have alcohol to turn themselves into real zombies. All weed does is make them mellow.
Aug 19, 2014 12:31:29 GMT -5
bhiatt: weed is the devil's drug.....kidding
Aug 19, 2014 12:48:42 GMT -5
PurplPixie: Alcohol is the worst, drunken zombies for sure
Aug 19, 2014 12:55:14 GMT -5
wampidy: I do not use either but I would much rather have a bunch of pot heads driving instead of drunks. All the pot heads do is slow you down and not kill you.
Aug 19, 2014 16:13:23 GMT -5
Fossilman: Sounds like the town might go belly up over this-hope not...
Aug 19, 2014 19:00:44 GMT -5
bhiatt: going to be a hot steamy night out there tonight. 90 something arrests last night. Lots of drug and gun charges. The main black cop that has been in the spot light said no protesting at night. I knew this was going to happen. The ghetto azzes come out...
Aug 19, 2014 19:13:27 GMT -5
bhiatt: at night stirring shit up trying to start a riot. A lot of out of towners coming in now.
Aug 19, 2014 19:14:16 GMT -5
Fossilman: Sounds like the 70's all over again....I remember that well...
Aug 19, 2014 21:13:01 GMT -5
bhiatt: they are out there again tonight. So far peaceful. Local news just started covering it. Last night it looked like a war zone by the end of the night.
Aug 19, 2014 21:24:21 GMT -5