thomcrum
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Post by thomcrum on Oct 27, 2013 1:42:27 GMT -5
I am looking to purchase two diamonds wheels, 80 & 180 grit roughly. I want 8" wheels and I was wondering where was the best place to find 2" wide wheels that are sintered. I thought that would be the best way to go about preforming since I have a heavy hand and like to work harder stones. Please let me know if you have suggestions on suppliers or perhaps a different approach. Thanks!
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Roger
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Post by Roger on Oct 27, 2013 11:29:26 GMT -5
Han Lapidary out of China: www.lapidarytool.com/cart/index.php?_a=category&cat_id=41 Even with the high shipping costs they are the least expensive option I have found. Their sintered wheels are 5mm of diamond, vs. 3.5mm of most. I have not used them, yet, but will be placing an order for them in the next month.
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thomcrum
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Post by thomcrum on Oct 27, 2013 13:28:20 GMT -5
Thanks! I will definitely being using them for the sintered wheels then. I noticed they have great prices on diamond belts also, about a third of the price of what I've seen elsewhere.
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rxscram
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Post by rxscram on Dec 13, 2013 12:43:37 GMT -5
Let me know how those Chinese wheels work. I'm always a little hesitant to buy Chinese manufactured goods unless I can be fairly confident of the quality.
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Roger
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Post by Roger on Dec 13, 2013 13:25:02 GMT -5
I have 3 of them now. 60, 100, & 220. I love them. They seem to be just as good as the American made wheels.
I don't see any wear on them really at this point. I have cabbed maybe 50-75 stones with them, mostly 6.5ish mohs.
No issues at all.
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cobaltbuffalo
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Post by cobaltbuffalo on Dec 13, 2013 13:49:13 GMT -5
If cost is an issue I see no reason not to give them a try.
My experience with Chinese diamond 6" flat lap disk (2x 60, 1x80, 1x100, 1x150, 1x600, and 1x1200)is that the durability is similar to the four Standard Diamond Disk from Crystalite that came with my machine. That is not to say that they would be as true if used for faceting.
I also like the only scintered tile saw blade compared to the blade that came with my Kobalt tile saw.
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Post by stoner on Dec 13, 2013 19:00:54 GMT -5
The sintered wheels from Hans are excellent wheels, long lasting, and about the only thing bad about them is that they are a bit heavy. I use them on my old Barranca Diamond DP8 and that machine is made like a tank, so weight is no problem. I bought a sintered wheel from Inland in 2007 when they were putting 5mm of diamond on their wheels and I'm still using it-and I've made a LOT of cabs. I bought a 60 and a 180 wheel from Hans about one to one and a half years ago, I've been using the 180 since and it doesn't show any wear, cuts good, and runs smooth. The price was right so I'll just hang on the 60g wheel until my old one finally bits the dust, which won't be for a few more years. Wheels made nowadays in the USA are on coated with 3-3.5mm of diamond and they're the same price I paid for my wheel in 2007-like anything else, less product and more cost!
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QuailRiver
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Post by QuailRiver on Dec 13, 2013 21:02:37 GMT -5
I bought mine from Hans. An 80gt and a 220gt. I wish I had gotten a 180gt instead of the 220gt. But they are 1-1/2" wide, not 2". I'm not sure where you could find 8" x 2" sintered grinding wheels. If you order from Hans be prepared for outrageous shipping costs. When I bought mine he was using DHL service. They were fast but expensive. Aside from the already mentioned weight, the only issues I've had with mine is that occasionally I find a spot of grey metal that looks a little like lead solder in with the matrix. I don't know that it is lead but it does have that look. It is nice however to be able to dress these grinding wheels with a SC block occasionally.
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unclestu
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Post by unclestu on Dec 13, 2013 21:52:45 GMT -5
Wow I am so glad I saw this thread. I posted a thread seeking information about getting a replacement 80 grit wheel for my Kingsley cab machine and I didn't get any replies. I was looking at the sintered wheel from Kingsley which is almost $300.00 Hans is less than half and it has more diamonds. This is the wheel at Kingsley North www.kingsleynorth.com/skshop/product.php?id=95921&catID=1079My Nova wheels all seem to be in fine shape it only seems to be the 80 that needs to be replaced. I might replace the 220 as well and I see some have said that they prefer the 180 as opposed to the 220. Should I go with the 180 or stay with the 220. I to am cautious when it comes to made in China but that does not seem to be the case with these wheels. Stu
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QuailRiver
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Post by QuailRiver on Dec 14, 2013 0:31:07 GMT -5
It seems to me that sintered wheels do not cut as aggressively as the same grit plated wheels do. My 220gt sintered cuts more like a 360gt plated wheel. So I'm thinking the 180gt sintered will cut more like a 220gt plated wheel. I believe this is because with a sintered wheel the diamonds are more embedded in the surface, and not raised up on the surface like they are on plated wheels.
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unclestu
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Post by unclestu on Dec 14, 2013 1:04:48 GMT -5
It seems to me that sintered wheels do not cut as aggressively as the same grit plated wheels do. My 220gt sintered cuts more like a 360gt plated wheel. So I'm thinking the 180gt sintered will cut more like a 220gt plated wheel. I believe this is because with a sintered wheel the diamonds are more embedded in the surface, and not raised up on the surface like they are on plated wheels. With what you just statein mind, if I am looking to replace an 80 grit wheel with a sintered wheel should I than choose a 60 grit sintered wheel as opposed to an 80 grit sintered wheel? I do recall reading on the Hans website that with sintered wheels you should use the next size as they don't cut the same as bonded wheels. Stu
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unclestu
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Post by unclestu on Dec 14, 2013 1:09:49 GMT -5
When reading the Hans website about the sintered wheels it does not specifiy what method of shipping they use and when you go to their policy and conditions page they state that in stock items usually ship within 15 days. That seems like a long time. For those who have ordered from Hans how did they ship your order and did it take a long time for delivery? Even with the high cost of shipping it still is about $100 less then the one at Kingsley Stu
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Post by Rockoonz on Dec 14, 2013 1:19:56 GMT -5
First shipment from Han a few years ago took about 4-5 weeks, partially I think because it was a large group order and an item or two wasn't in stock ready to ship. Average has been a couple weeks. Most recent order was just 2 of us and took less than a week to arrive.
Lee
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QuailRiver
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Post by QuailRiver on Dec 14, 2013 1:34:59 GMT -5
With what you just stated in mind, if I am looking to replace an 80 grit wheel with a sintered wheel should I than choose a 60 grit sintered wheel as opposed to an 80 grit sintered wheel? I do recall reading on the Hans website that with sintered wheels you should use the next size as they don't cut the same as bonded wheels.
Stu[/quote]
I haven't used their 60 grit sintered wheel so I'm reluctant to answer that for fear I may steer you wrong. I can report that their 80 grit sintered doesn't seem to cut as aggressively as a 100 grit plated wheel but I am happy with the performance of my 80gt sintered. When it's cutting ability seems to slow down I just give it a light dressing with a piece of 220 grit SC wheel and it freshens it right back up.
As for the shipping, I had also ordered other laps and saw blades which were heavy too. This was in June-July of 2011. My order total was $828.40 and shipping was another $406.00. So the shipping added almost 50% more to the costs. It did take a couple of weeks for Mohan to ship the order. He used DHL as the shipper and the order was delivered from China to North Carolina in 2 days. Larry C.
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unclestu
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Post by unclestu on Dec 14, 2013 1:43:56 GMT -5
First shipment from Han a few years ago took about 4-5 weeks, partially I think because it was a large group order and an item or two wasn't in stock ready to ship. Average has been a couple weeks. Most recent order was just 2 of us and took less than a week to arrive. Lee Thanks Lee One or two weeks for delivery is not that bad and with shipping it still is almost $100 cheaper than a US wheel and these have 1.5 ml more diamond. Maybe I will give them a try. Just have to learn if I would be better off with a 60 grit as opposed to an 8 grit. Stu
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unclestu
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Post by unclestu on Dec 14, 2013 1:51:07 GMT -5
Thanks Larry I think I will go with the 80 grit as I think a 60 might cause chipping on some of my stones. You mentioned that you would give it a dressing with 220 grit SC. I am not that familiar with what that is. What is "SC" and how do you dress a wheel? Please excuse me if tht sounds like a foolish question. Stu
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jamesp
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Post by jamesp on Dec 14, 2013 5:54:12 GMT -5
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QuailRiver
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Post by QuailRiver on Dec 14, 2013 11:18:45 GMT -5
SC is Silicon Carbide. Back when I first started cabbing, man-made diamond production on an industrial scale was still fairly low and diamond products were too expensive for the hobbyist market. For lapidary everyone was using silicon carbide grinding wheels and sanding belts and discs. Compared to the diamond products we have today the SC products were slow and messy but we didn't know any difference back then. The Silicon Carbide grinding wheels would develop deep grooves and uneven areas and could also get out of balance. They had to be dressed back into shape with a hardened tool steel dressing tool or diamond pointed dressing tool. Dressing a SC wheel was an art form within itself so few people ever got good at it and usually ended up just buying a new SC grinding wheel when their old one became too uneven to use. As a result there are still tons of old used lapidary SC grinding wheels laying around in 30+ year old collections. These old used 100 and 220 grit SC wheels are a great inexpensive material to use for dressing slab saw blades and sintered diamond products, but should never be used to dress diamond plated products because they will remove the diamonds along with the plating metal on the plated wheels.
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QuailRiver
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Post by QuailRiver on Dec 14, 2013 11:26:16 GMT -5
@stu Sorry I forgot to answer your last question in the former post. To dress a sintered diamond grinding wheel You just use a flat area of a piece of a SC wheel, and holding it parallel to the diamond cutting surface just apply light pressure for a few seconds. The SC will wear away a little of the metal surface away and expose more diamonds. Larry C.
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Post by Rockoonz on Dec 14, 2013 11:34:35 GMT -5
If you have used a plated 80 grit wheel and liked it the most when it was new you will want a 60 grit sintered. If you liked the 80 grit plated wheel better when it was broken in after a few months the 80 grit sintered will probably be better. The sintered wheel will grind away at about the same rate through it's entire life.
I have a well worn 50 grit 8 inch wheel in need of replacing, will probably try 80 grit sintered. I don't like the way the coarser grits tend to chip the edges when preforming, I end up having to grind more of a back bezel than I want so I can get rid of the chipped edge.
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