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.
bhiatt: 2200 national guard, 700 police officers. Ew Raw! I shure hope they shut them pant sangers down tonight.
Nov 25, 2014 19:13:49 GMT -5
mr.mohs: pant sangers
Nov 25, 2014 22:44:13 GMT -5
bhiatt: dang looks like New York has bigger protest going on than st Louis.
Nov 25, 2014 23:20:05 GMT -5
Fossilman: A bunch of fools!
Nov 26, 2014 0:02:30 GMT -5
wampidy: All for a silly little thing like shooting an unarmed man with his hands up six times. Police attacking news camera men like they are wild dogs. There is a large group of veterans and active duty military personnel asking the National guard to stand down.
Nov 26, 2014 9:22:50 GMT -5
wampidy: About a hundred constitutional rights have been violated and this could be a huge turning point in becoming a police state or not. We could loose a lot of rights here. I am not agreeing with the looting and fires but the police have been very bad there.
Nov 26, 2014 9:26:35 GMT -5
Fossilman: I'm talking of the looting,fires and etc........Just like the 60's and 70's again....
Nov 26, 2014 10:39:20 GMT -5
bhiatt: Here in St Louis the police or national guard have not got aggressive. That's why the trouble makers had their way. Last night they had the numbers and just swarmed the streets telling people to basically leave. This was at 11 at night not during the day
Nov 26, 2014 14:46:43 GMT -5
bhiatt: when the peaceful protestors come out. I think the police and national guard now have them basically under control. They still might be out for the rest of the week, I wouldn't doubt that. The po po and nat. guard did not want to start a big shoot out,
Nov 26, 2014 14:49:57 GMT -5
bhiatt: I probably wouldn't even be watching the crap if it wasn't so close to me.
Nov 26, 2014 14:50:44 GMT -5
1dave: We know we are in trouble when the president and attorney general are egging the demonstrators on!
Nov 26, 2014 18:07:27 GMT -5
snowmom: Happy Thanksgiving to everybody and safe travels!
Nov 27, 2014 4:49:59 GMT -5
snowmom: SNOW woke up to the gift of a thick blanket of sparklers where there had been none.
Nov 27, 2014 4:50:42 GMT -5
rockpickerforever: The weather is here, wish you were fine, lol. Gobble gobble!
Nov 27, 2014 17:38:49 GMT -5
mr.mohs: margarita's must make you dyslexic ...been miss'nya... Happy Thanksgiving!
Nov 27, 2014 20:11:22 GMT -5
rockpickerforever: Ed, that ain't the half of it! Have missed you, too. Hope you had a great turkey day.
Nov 28, 2014 0:55:11 GMT -5
snowmom: Record setting 11 inches over thanksgiving here, what will the rest of winter be like?
Nov 28, 2014 6:16:58 GMT -5
wampidy: We got a little snow but most of it melted yesterday so the streets are like oiled glass today. Haven't heard any sirens yet but it is still early. Our Tgiving is tomorrow because some of the people could not make it here for a Thursday Tgiving.
Nov 28, 2014 10:25:41 GMT -5
wampidy: Happy rest of the weekend to all.
Nov 28, 2014 10:26:14 GMT -5