HuntingHuron
starting to shine!
Member since October 2020
Posts: 39
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Post by HuntingHuron on Dec 19, 2020 15:38:32 GMT -5
Two questions here: 1) Is 5300 RPM too fast for trimming rocks with a wet saw? If it is, what is the ideal speed ? 2) For grinding off unwanted parts of a rock for tumbling, what is the most cost-effective way to do this? Is a flat lap the only good option? I knew I should have kept my 37 year-old turntable .
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Post by pauls on Dec 19, 2020 17:03:06 GMT -5
I think 5300 RPM is too fast, but what size blade. The important thing is surface feet per minute, you should be able to get the information from the blade manufacturer.
A flat lap is not really the best option for trimming up stuff for tumbling, a lot of people use a tile saw, some use a tile saw with a tuckpoint blade to remove material fast. I use a sintered 60 grit diamond grinding wheel. All these options should be done wet because of the danger of silicosis.
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HuntingHuron
starting to shine!
Member since October 2020
Posts: 39
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Post by HuntingHuron on Dec 19, 2020 17:56:03 GMT -5
Thanks for the information pauls . For reference, would you happen to have a link to the grinding wheel you are referring to please? Can this be fitted to your garden variety bench grinder or does it need to be a special lapidary-dedicated machine? My guess is that a regular bench grinder wouldn't have the required shielding and draining. Thanks very much.
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Post by pauls on Dec 20, 2020 0:58:01 GMT -5
Sintered grinding wheels are eye watering expensive, they do have a lot of diamond though. They can't really be used on a standard bench grinder because they need to be run wet. Really the cheapest and quickest would be the tile saw, just one of the ones where the blade sticks up through the table of the saw, not one of the fancy ones. Blades are cheap and they do a decent job. I drilled a hole in the guard on mine and feed water in from a tube down onto the blade, if you use it like a tile saw with the sump full of water you will be saturated in minutes, just leave the bung out and run the water into a bucket.
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HuntingHuron
starting to shine!
Member since October 2020
Posts: 39
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Post by HuntingHuron on Dec 20, 2020 9:33:27 GMT -5
Very creative idea. Thanks for the tip ! By the way, I found the answer on saw speed by searching, and found a thread on this site from 2008. It pointed to this helpful link...... www.diamondpacific.com/determiningsawsp.html
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