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Lapidary Shop / Moderator, Catmandewe ( Tony ) / Miscellaneous Shop Talk  / Waste Water from Grinder/Polisher?
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on: June 20, 2015, 03:55:54 am
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O.K. I have read in several threads that it is unwise to pour your waste water
down the drain as the stone particles will (I guess when the water evaporates)
set like cement and would block the drain.
Correct?
Will it set like cement in a bucket if I just let the water evaporate as well?
Will it set like cement in any container if I let it sit there and the water evaporates?
If the above is correct I think some of you will know what I am thinking.
James
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232
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Lapidary Shop / Moderator, Catmandewe ( Tony ) / Slab Saws, Trim Saws, Blades & Lubricants For Both / General Operating / Ameritool Trim Saw Questions
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on: June 14, 2015, 09:22:36 am
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Hi! Can someone tell me the dimensions of the Ameritool 4" Trim Saw? I know the saw table is 6" x 10" but I need the dimensions of the complete unit. Also, I have been reading that it is sold as a 4" but can also take a 5" blade. Do you have to adapt the slot in the table to accommodate the larger blade or is it fine out of the box? I read somewhere, can't find it again, about someone using a hacksaw to lengthen the blade slot. Not sure about that. Lastly, will the Vise attachment hold small rocks, say 1" cubed (what is sold as Chips)? 1" is not very big and am not to keen on placing my fingers to near the spinning blade. I only have 10 fingers and want to keep them for a while longer.  Thanks! James |
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234
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Stone Talk / Moderator, Hummingbirdstones ( Robin ) / Mineral Specimens / Re: Anyone See This Before?
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on: June 12, 2015, 05:02:31 am
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Coquina Stone (jasper) is the common name I have seen. It is beautiful and is a bear to cut and polish. Every piece I have cut is soft, wants to undercut and is slightly more like rhyolite than jasper. And I love the stuff, it is gorgeous when done correctly. Has anyone ever found a piece they thought was hard and well silicified?
Haven't tried to work any of it yet. Still setting up my equipment. Got some more "I like it" odd stuff as well. Will post pictures tomorrow. James |
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238
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Lapidary Shop / Moderator, Catmandewe ( Tony ) / Discs, Wheels, Belts, Pads, and Polishing / Re: Adhesive for Sponge Pads
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on: June 06, 2015, 05:04:15 pm
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James said:
"For the sponge pads with the PSA ,I assume they will only glue once. When you soak the backing plate in hot water
so you can remove a worn out sanding disc to replace it ,the sponge pad will also come un-glued as well."
I may be missing the whole point but I have never had to soak the head in hot water the psa sanding disk should just peal off the foam always has for me. Are you using the black gunky stuff that comes in a tube? It shouldn't make any difference, all the adhesives I have used or seen are supposed to be water resistance hence you can use them as wet sanders maybe being hot makes the difference. They should be reusable several times before they are worn out. sorry if I'm not getting the point. Oh by the way the foam backing on a metal or plastic head will tend to tear when removing it but I never remove until it is degraded so much it won't work anymore.
In another thread I was advised to get the 3M Feathering Disc Adhesive to glue non-PSA sanding discs to the back plate. This, I am led to believe, is not a permanent adhesive and the sanding discs can be removed and replaced when they wear out. I was under the impression you put the backing plate with the sanding disc stuck to it in hot/warm water to loosen them and then they just peel off. Maybe the water is not needed but I thought that's what was meant. That works fine if you are just using sanding discs on top of the backing plate. But I am putting a sponge pad (either PSA or Non-PSA) n-between the sanding disc and the backing plate. I don't want to use the same feathering adhesive on the sponge pad as I gather when I peal off the sanding disc the sponge pad, having the same adhesive will also peel off with the sanding disc. That's why I was asking if the sponge pads wear out. If they don't, or at least not very often, then I want to use a permanent adhesive to glue them to the backing plate, and only use the feathering adhesive on the sanding disc. That way when I peel off the sanding disc the sponge pad will stay adhered to the backing plate and I don't have to re-glue it. James |
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Lapidary Shop / Moderator, Catmandewe ( Tony ) / Discs, Wheels, Belts, Pads, and Polishing / Re: Adhesive for Sponge Pads
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on: June 06, 2015, 08:33:44 am
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I just get the disks and pads that already have the adhesive on them. They are labeled PSA.
I did too. I also got a couple that are non PSA. For the sponge pads with the PSA ,I assume they will only glue once. When you soak the backing plate in hot water so you can remove a worn out sanding disc to replace it ,the sponge pad will also come un-glued as well. If the sponge pad is still good (not worn) you will have to re-glue it back to the backing plate before you attach a new sanding disc. What I am asking is that if the sponge pads don't wear out, why not glue them to the backing plate once with permanent adhesive. Instead of regluing them each time with the feathering adhesive. I know this won't come up that often (we hope) but regluing the same sponge pads over and over again seems like an unnecessary task. Does anyone know if the sponge pads wear out? James |
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