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Post by knave on Oct 6, 2021 10:19:41 GMT -5
So one thing I like about my SIC wheels is there is always more grit and you can dress it. Our KN 80 grit electroplated wheel is kind of slow already.
The obvious down fall of sic wheels is they get out of round. At least one of ours is (the rough one). I bought a dresser and it fixed the dished out effect but the wheel is still out of round.
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Post by Starguy on Oct 6, 2021 12:14:16 GMT -5
Did you try a star dresser Evan? knave . If you set the dresser on something heavy like a sledge hammer head, it should true the wheel pretty well. Just let it hit the high spots until it’s round again.  |
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Post by knave on Oct 6, 2021 12:22:08 GMT -5
No, I just got the flat diamond bar.
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Post by Starguy on Oct 6, 2021 14:08:55 GMT -5
The star dressers work really good. I dressed these beasts with one. They’re for sharpening axes and knives. Not for rocks.  |
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Post by knave on Oct 6, 2021 14:26:27 GMT -5
Thank you.
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Post by mohs on Oct 6, 2021 14:45:02 GMT -5
The star dressers work really good. I dressed these beasts with one. They’re for sharpening axes and knives. Not for rocks. that really cool Starguy I'm ashamed to say never put a blade to a treadle operated stone not sure how I've missed out on that pleasure guess that a dual course /fine stone operation ? grind and exercise my way to make buck or a least a smile really enjoy your posts sharp on! |
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Post by Starguy on Oct 6, 2021 14:51:51 GMT -5
knaveYou’re more than welcome. I started on SiC wheels. I got some corundum early in my rock career. It was hard to tell if the rock was grinding the wheel more. The star dressers are awesome. Just remember to set it on something heavy. They’re made for truing steel bench grinder wheels. Bench grinders have a solid rest to sit them on. Rock grinders don’t have the rest. You just need something heavy. Diamond wheels are vastly superior. You can use your old SiC wheels to dress your diamond wheels.
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Post by Peruano on Oct 6, 2021 14:54:23 GMT -5
Out of round can be out of balance, and I've heard too many stories of Sic wheels exploding with serious injuries to the person standing in front of them. 1. Always spin them after the water is turned off to get rid of surplus water; 2. Make sure that water is turned off; 3. Never stand in front of one when its first fired up to a normal spin speed.
Diamond lasts a long time if used with some skill and adequate water. JMHO.
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Post by Starguy on Oct 6, 2021 14:55:08 GMT -5
mohsYou should see my axe collection. Those treadle stones are cool. I have a few hours into fixing them up.
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Post by mohs on Oct 6, 2021 15:01:08 GMT -5
So one thing I like about my SIC wheels is there is always more grit and you can dress it. Our KN 80 grit electroplated wheel is kind of slow already. The obvious down fall of sic wheels is they get out of round. At least one of ours is (the rough one). I bought a dresser and it fixed the dished out effect but the wheel is still out of round. yes Evan out of round S/C wheels on lapidary grinder are real pain to true and to keep true ha I consider my self a hell of good dresser well,,, good enough for the rock gals I associate with  Butte haven't figured out how to keep a S/C wheel true at least for an efficient amount of time on lapidary grinder I think it the speed Light pressure, move the stone across the face plus I angle dress the 2 edges hoping to reduce the dish Those wheels are rated at 3250 rpm lapidary rpm is half that speed which is good I don’t recall having the problem in sharp shops Anyway I use them a lot They last a good long time Still have my original 8” wheel ground down to 2 inch. 20 years. Lot of rocks. It still as potential have you t-handle diamond dresser? they have them Harbor Freight A carbide tipped machine tool can come in handy to... anyway I like stoned grinding wheels  |
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Post by knave on Oct 6, 2021 15:02:21 GMT -5
Yes a tee handle style
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Post by Starguy on Oct 6, 2021 15:09:03 GMT -5
Peruano You make a very good point. SiC wheels can be very dangerous at 1750 RPM. The wheels need to be retired when they get too out of round. Thank you for pointing this out. I was a little focused on helping knave true his wheels. Diamond wheels are so much safer.
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Post by knave on Oct 6, 2021 15:11:24 GMT -5
Both my machines came with sic. I also have a 80 grit KN diamond hard wheel that has enough diamond on it to chip my favorite material so maybe I’ll just use it a while longer.
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Post by mohs on Oct 6, 2021 15:17:24 GMT -5
well as far as wheels exploding
I been front of lots of wheels in sharpening shops
all kinds of size and shapes
different types of high grinders,
ect...
I've never had one explode
and I know of no one who as
not sure why?
but glad not to hah
anyway good work if ya can get it !
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Post by Starguy on Oct 6, 2021 15:25:06 GMT -5
Both my machines came with sic. I also have a 80 grit KN diamond hard wheel that has enough diamond on it to chip my favorite material so maybe I’ll just use it a while longer. 80 grit wheels will do that. That’s what 220 grit wheels are for. Keep up the good work. knave |
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gemfeller
Cave Dweller 
Member since June 2011
Posts: 4,049 
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Post by gemfeller on Oct 6, 2021 15:30:36 GMT -5
knaveYou’re more than welcome. I started on SiC wheels. I got some corundum early in my rock career. It was hard to tell if the rock was grinding the wheel more. The star dressers are awesome. Just remember to set it on something heavy. They’re made for truing steel bench grinder wheels. Bench grinders have a solid rest to sit them on. Rock grinders don’t have the rest. You just need something heavy. Diamond wheels are vastly superior. You can use your old SiC wheels to dress your diamond wheels. Those were the days! I remember the grooves in the SiC wheel made by my first attempt to cut a Montana star corundum! At that time diamond wasn't an option unless you were very wealthy -- a condition then and now unfamiliar to me. I strongly recommend saving one's pennies to invest in sintered -- not plated -- diamond wheels. What a difference! They're scary expensive at first glance but if you do the math it's clear they'll save a bunch of money over a fairly short time. At the rate I normally cut I was going through 2 to 3 80 grit plated wheels a year. I've had my sintered wheel for about 4 years and it's barely broken in. |
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Post by Peruano on Oct 6, 2021 15:31:39 GMT -5
I do not mean to discourage anyone from using Sic wheels; work was done on them for years but . . . people did get injured occasionally. Never use one that appear to be out of balance (i.e. has a major chip out of the side or circumference. Be religious about making sure they are not water logged (the water sinks to the bottom when they are not rotating and causes a significant imbalance. SIC belts are cheap and together with the appropriate sized expando wheels are worthwhile alternatives for economy shops. The soft foundation of an expando can get scratches that even a Nova wheel will take longer for. But thats a different story.
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Post by Starguy on Oct 6, 2021 15:38:08 GMT -5
So glad to hear Rick gemfeller . I’ve been thinking of investing in a sintered 8” wheel. Mine are plated that came with the 8V-1. I checked out Elise’s websites. I tried to contact her on fb. I truly have some gems exhibiting asterism. Her Idaho star garnet photo is rather poor. |
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Post by pauls on Oct 6, 2021 16:57:53 GMT -5
well as far as wheels exploding I been front of lots of wheels in sharpening shops all kinds of size and shapes different types of high grinders, ect... I've never had one explode and I know of no one who as not sure why? but glad not to hah anyway good work if ya can get it ! To quote the donkey in Shrek, "Me me Pick me." I have had it twice, My father was an Turner and Fitter basically a Lathe and machine operator, he always told me to step aside when switching on a grinder because the wheels can explode, Yep it happened.I think a slow water leak had soaked the bottom of the wheel putting it badly off balance. I also had a 10 inch blade on an angle grinder do it, I always always wear goggles, this particular day the goggles were dirty so I grabbed the full face shield, turned the angle grinder on and almost instantly a large chunk of cut off wheel lodged itself in my face shield, would have seriously injured or blinded me if I just had the normal goggles on. If you can afford it go Diamond wheels, if you can afford it really lash out and go for sintered wheels, you will never regret it. |
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Post by mohs on Oct 6, 2021 17:09:54 GMT -5
well as far as wheels exploding I been front of lots of wheels in sharpening shops all kinds of size and shapes different types of high grinders, ect... I've never had one explode and I know of no one who as not sure why? but glad not to hah anyway good work if ya can get it ! To quote the donkey in Shrek, "Me me Pick me." I have had it twice, My father was an Turner and Fitter basically a Lathe and machine operator, he always told me to step aside when switching on a grinder because the wheels can explode, Yep it happened.I think a slow water leak had soaked the bottom of the wheel putting it badly off balance. I also had a 10 inch blade on an angle grinder do it, I always always wear goggles, this particular day the goggles were dirty so I grabbed the full face shield, turned the angle grinder on and almost instantly a large chunk of cut off wheel lodged itself in my face shield, would have seriously injured or blinded me if I just had the normal goggles on. If you can afford it go Diamond wheels, if you can afford it really lash out and go for sintered wheels, you will never regret it. Sorry to hear of the unfortunate event pauls
that stepping to the side
when powering on is
excellent advice  Guess I just been lucky fool Safety first ! there is a lot danger on the edge of town & let the spinning wheel Ride |
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