UltraSharp Diamond Stones ... Anyone Here Using Them?

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Forum topic by Lovegasoline posted 05-16-2018 11:35 PM 5438 views 1 time favorited 25 replies Add to Favorites Watch
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93 posts in 810 days

05-16-2018 11:35 PM

I’ve got some water stones but I want to try out diamond stones because I’d like to put the resurfacing and soaking behind me, plus be able to work on carbide edges and also flatten some items.
I’m seeing what looks to be a budget priced set of three 8” x3” diamond plates:

But I’m not seeing much by way of woodworkers, plane sharpeners, etc. who have used them. Anyone here own a set and would care to give some feedback?
Thanks a bunch!

25 replies so far

View Robert's profile


3742 posts in 2252 days

#1 posted 05-17-2018 02:30 PM

No I don’t use them but I’ll stick my nose in if you’ll permit.

IMO you need a higher grit than 1200, especially for chisels and plane irons.

I believe the Diasharp EEfine equates to 8000 grit.

-- Everything is a prototype thats why its one of a kind!!

View LesB's profile


2553 posts in 4214 days

#2 posted 05-17-2018 04:41 PM

I use the diamond stones and where I need a finer edge I use the super fine sandpapers mounted on a glass or granite slab, then a buffing wheel.
I think the 1200 diamond stone is all you need for carbide because on carbide is almost impossible to get as fine an edge as steel.

-- Les B, Oregon

View MrRon's profile


5913 posts in 4015 days

#3 posted 05-17-2018 04:55 PM

I sharpen everything with a diamond stone. The secret is to not be aggressive with a diamond because they cut so quickly. I find that when I sharpen a kitchen knife, I take a light swipe on one side and then on the other side and then wipe the knife on a white cloth (usually my tee shirt). it leaves a black trail. That shows me how aggressive a diamond stone is. In the past, I have been going at it aggressively and wondering why the blade was not getting sharp; too much aggression.

View OSU55's profile


2646 posts in 2761 days

#4 posted 05-18-2018 03:45 PM

I use dmt stones extensively with flatwork and lathe tools. I consider them far superior to oil or waterstones because they cut quickly, sharpen any hardened steel, stay flat, and there is little mess with water or other liquid for swarf. Any flat blade gets polished with polishing film for a superior edge.

I also wonder about the Ultrs sharp brand stones. The price is nice but may reflect lesser overall performance and not be that good of value.

View Lovegasoline's profile


93 posts in 810 days

#5 posted 05-18-2018 06:05 PM

Currently finest water stone is a 6000 grit King.

I like water stones but the mess, fuss, and stone maintenance has always been a bit of a fly in the ointment. I never keep my stones always soaking in water and ready, and due to small shop space restrictions I end up sharpening on the kitchen table, lol. While the actual action of metal on water stone is pleasing, it’s messy, clean up is a PITA, and the whole production removes it from an integral part of the fabrication flow.

Influenced by reading Paul Sellers recently and imagining a convenient piece of plywood holding three diamond plates + a strop non of which need to be babied, I’m curious.

It’s interesting that some of you are finding 1200 too coarse. OSU55, can you elaborate on the polishing film? Are you introducing a step after your finest diamond plate (at what grit?) and before stropping (I’m assuming you do the latter?).

Alas, still no feedback on the diamond plates in question, the UltraSharp.
Reviews on Amazon are gushing and appear legit, but odd that no woodworkers are using them. Owing to the fact that I already have several water stones so I can’t at present justify the expense of a set of DMT Diamond Plates and even the EZElap plates are a chunk of change for a set of three: but $108 for the UltraSharp three plate set offers a temptation.

View gleasoncraftworks's profile


33 posts in 2006 days

#6 posted 05-18-2018 06:23 PM

I use the DMT DiaSharp’s, and I have no complaints. I have three of them (coarse, fine, and extra fine) along with a leather strop set into a board as a sharpening station. It is infinitely more convenient than any other setup I was using. It only takes a few passes on the fine and extra fine stones, and then a lick on the strop, to be as sharp as can be. I only use the coarse to repair damage or flatten new tools. Honestly, a guy could probably get by perfectly with just the two finer ones.

My reference points are using a white aluminum oxide wheel on the slow speed grinder, an oil stone, and the “scary sharp” sandpaper method. Of the above, the oil stone was a huge pain in the body parts, the AL-OX wheel works well enough, but burning the edge is always a danger. The “scary sharp” method produces the sharpest tools you can possibly imagine, but it seems like such a chore each time. I always dreaded doing it, and my tools were probably dull all the time. The diamond stones are fast, easy, and convenient. I run a lap across the setup each time before I use my tools and I hardly feel like I lost any time at all, and my tools are razor sharp.

I have no idea why there is so little feedback here about your question, but I will summarize my answer thus: I can’t see myself using anything else to sharpen chisels and plane blades. Period.

Good luck!

View Mr_Pink's profile


193 posts in 1143 days

#7 posted 05-18-2018 06:44 PM

I have the fine and extra fine Ultrasharp plates, and I think they’re a great deal. They are both perfectly flat, and I’ve noticed no defect in either of them. Most importantly, they both work as expected.

View Lovegasoline's profile


93 posts in 810 days

#8 posted 05-18-2018 07:14 PM

That’s good to hear Mr. Pink. Have you used any other brands Diamond plates as comparison?

View Mr_Pink's profile


193 posts in 1143 days

#9 posted 05-18-2018 10:21 PM

I have a coarse DMT that sits next to the two Ultrasharp. I also have two smaller EZE-Lap plates that the 8×3 Ultrasharp plates replaced. While this doesn’t allow a perfect apples-to-apples comparison, I can say that there is no obvious difference in quality.

The only minor difference I noticed is that the Ultrasharp plates didn’t ship with stick-on rubber feet like the others did, but I’m not sure that’s a negative. (It certainly doesn’t justify the price difference.) The rubber feet that came with the established brands slide around more than the no-slip feet I bought the cheaper plates.

View OSU55's profile


2646 posts in 2761 days

#10 posted 05-19-2018 11:31 AM

Loves gasoline here is my blog on sharpening. In short, jagged edges can be stropped and be sharp, but wont last as long as a smooth sharp edge.

View waho6o9's profile


8908 posts in 3348 days

#11 posted 05-19-2018 01:50 PM

I’ve had better results using Atoma diamond plates than the DMT diamond plates.

View r33tc0w's profile


191 posts in 1255 days

#12 posted 05-19-2018 02:08 PM

Finally got a coarse and extra fine plate and the first chisel I sharpened took about 10min to re-establish a new bevel. Of course this was a cheap chisel I got at Lowe’s and now I’m regretting the rest because the factory clear coat they put on the chisel is now yellow on my plates. Will this affect the plates or is this just a aesthetic thing that’ll go away eventually?

-- Matthew 13:53-58

View Charlie H.'s profile

Charlie H.

405 posts in 1421 days

#13 posted 05-19-2018 03:30 PM

I have looked at all of the diamond plate options before and ultimately decided to go cheap with sandpaper on a flat tile.
For the most part I have been good with that but this week got me thinking about that decision again.
i know I simply reaped what I had sowed but I have spent a lot of time reconditioning some old chisels that I have been abusing for years.
It’s a little bit late now but I f I hadn’t just gone through that this thread might not have prompted me to order those UltraSharp diamond plates.
Yeah, I know, kinda going cheap again.
It will be a while before I know how good they are, but when I have used them enough to have a reasonable opinion I will try to dig up this thread and post my experience with them.

-- Regards, Charlie in Rowlett, TX --------I talk to myself, because sometimes I need expert advice.---------

View Lovegasoline's profile


93 posts in 810 days

#14 posted 05-19-2018 07:27 PM

Mr_Pink, thanks a bunch for the report that’s the sort of practical info that makes the UltraSharp seem worth trying.

waho6o9, I’ve read great things about the Atoma plates however they’s out of my budget for sharpening upgrades at present.

r33tc0w, maybe try cleaning the blades with lacquer thinner before sharpening?

Charlie H., yeah the diamond plates can be pricey, that’s the appeal of the UltraSharp plates. For what it’s worth all the Amazon reviews are overwhelming positive and I’ve not read any feedback that trashes the plates. Their guarantee seems like the vendor is willing to back up the product, and the price is great especially for those on a budget and sitting on the fence regarding diamond plates.

OSU55, thanks for the links it looks interesting, I’m looking forward to perusing your efforts when I’ve got some free time.

View r33tc0w's profile


191 posts in 1255 days

#15 posted 05-20-2018 12:14 AM

I was just gonna not sharpen them on the stones – what about removing the yellow from the plates? Would it be safe to use thinner on them?

-- Matthew 13:53-58

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