I own both the Shapton pro line, and the kuromaku line,as far as I have found,and heard. They are the same ,all differences are in the names alone.

Great video brother!! I definitely have to get those gritomatic sic stones!! Thanks for sharing all of this information Jeff!!! Much appreciated!!!

Awesome, thank you very much for the video, I appreciate it! I'm 100% down with getting these to work on my Spartan Blades combat knives, made from S35VN/58-60HRC steel. I already have the Norton 2.5" X 8" India coarse/fine stone, however, the fine side is #320, so I am in love with being able to get some further refinement with these stones. I'm going with just the #1200, & the #2500, since the Norton will take care of the initial work.

Thank you for this video. The info was great. I think it's time to buy some stones and get to it.

Very informative. I'm seriously considering the gritomatic stones. Thanks formposting.

Hey Jef, a great video as usual; undoubtedbly some of the very best, most informative whetstone review available anywhere, right here. Kudos! You mentioned that Gritomatic stones' website said that certain alloys (E.g. 440c, 8Cr13MoV) would lead to faster wear. Now, while you do say that you've not found this to be the case; I wonder if, because of that superb collection of blades of yours, you tested this with well heat treated and harder samples of these steels. Perhaps it's using the Gritomatic stones with such alloys, but which have been left in a very soft state, that could result in faster wear? From what I think I understand, both 440c and 8Cr13MoV are uncommon stainless steels insofar as they both contain enough carbon to be readily heat treatable to 60+ HRC, so I'm thinking that there could be 10+ point gap in Rockwell C hardness between a high quality blade and a poorly heat treated one. I find it interesting that perhaps this is where the disconnect between your first-hand experience and the manufacturer's disclaimer, regarding wear speed, comes from. I'll preemptively grant any contrarians out there that this is a mainly hypothetical question; because as you very explicitly say: these silicon carbide Gritomatics would be advisable for particularly hard to grind, high carbide steels; whereas your general recommendation was for the Kuromakus. But I'd be curious to know if there's is actually some usage scenario which does result in the faster wear the manufacturer warned of with 440c, 8Cr13MoV or others.

Thanks Jeff really informative. Atb wee paddy from across the shuck. 😜👍☘️

Thanks for the presentation. I hope to get soon (custom's crap everywhere) the 240, 600, 1200 and 2500 to try it out.

Thank you very much for that information. I was wondering what you would recommend.

Jeff, I'm going to test the 240 grittmatic silicon carbide stone, on very soft kitchen steel. The American Mutt stone wore to fast, but cut fast. I work in kitchen and the knives on monday are dull, damage almost no edge. Perfect way to test, the 240 grittmatic silicon on soft steel.

Jeff I saw that gritomatic stated that the silicon carbide stones would wear faster when sharpening softer steels. I too thought that made no sense. I'm glad you confirmed that was wrong. Total agreement with you.

Pro and kuromaku are the same😉 I agree about the gritomatic stones not wearing faster with softer steels ,only difference i found is that they sometimes clog a little easier with softer steels

I'm assuming the hidden giveaway, was done a long time ago. I really need to buy myself some of those gritomatic stones. I got the venev 240/400 which gets most of the work done on high carbide steels. I still need something for higher polishing on them though. My Japanese stones are awesome, but when you are sharpening s110v they just don't do much.

Thanks for doing this one too, Jef. You know how I love the Gritomatic stones, and Konstantin is a great guy! They get most of my stone money. I will say though. That I'm done with their 120g (JIS) SiC stones. I seem to be surfacing them ALL of the time. I need to look for a CBN replacement, for that one. When I have some time. Have you tried their Organtic CBN stones yet? I see they have one of those, in a 150g.

Hey jeff I ordered 2 more SharptonPro stones. An 2k 5k on ur recomondation. And next week I'm ordering a chosera 800 & 3k... I saw in one of ur older vids were you had a clear stone/hotel pond/pan with a suehiro stone bridge. How did you like that angled bridge & howd that set up work for u? Keep up the good work & thank you for ur generosity with ur time. I will pass it for word...

I had a stone from someone a 4000 K stone and now I realize is very similar to the gritomatic. I was wondering how did you order them directly from Russia. I want to try their range too. :)

I'm thinking about buying some Shapton Pro stones but I have quite a few knives in S30V, S35VN, 20CV and of course 440C, 1095 and other low end steel. Will the Shapton Pro stones do the job?

the HCR line from Haidu ceramics in Hungary, ran me 100$ for 1k-4k-8k and 250grit for lapping, very nice sizes, Corundum abrasive. They had a retailer in USA as well, corwainertools. Imo the japanese stones, it's not that they don't do a great product, but very overrated, it's an expensive country to begin with so we can't blame them for the price. Always buy locally, i was lucky enough to live in Europe and have whetstone manufacturer close. I'm sure there are lots of out there. As long as the maker bakes the ceramic correctly. The corundum abrasive or the SiC are basically the same in any synthetic stone on the market.

Live your video

Huh never noticed the kurnomaku stones gotta get some of those lol good bit cheaper I don’t trust amazon that much though lol

Which stones are the best for the most knife steels (Ex: Gritomatic for softer steels (and harder) like s30v or D2, Kuromaku for harder steels (and softer) s90v M4, or do you have to buy different stones for different knife steels?

Gritomatic won't ship to Canada pretty upset j chang get theses stones ! I wang a venev diamond too but sucks they won't deliver

What are your favorite stones for super steels

How fast do the GRITOMATIC SiC stones dish and glaze? Which coarse stone does better with D2, Gritomatic or Shapton?

What do you think about the pink brick

What stone would u recommend just for kitchen knives in hunting knives thanks

How do the gritomatic stones feel? Are they hard stones or softer?

For my first stones I went with imanishi 1000/6000 & a 3000/8000 combo stones. what you recommend for coarse stones & should I get an imanishi 10,000 or a ShaptonPro 12,000 for polishing. Thank you

compare to the scratches, which stone line has the least deep scratches?

I would have returned the broken stones to amazon they eat the cost not the company.

Hidden give away, it's not nice to fool old people.