Knife Sharpening - Gritomatic Silicon Carbide Benchstones
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- Опубликовано: 18 сен 2024
- Knife Used Ganzo Model
Steel 440c
Pressure used approx 2-3 lb, hand weight only
Stones used
Silicon Carbide 240 grit
Silicon Carbide 1000 grit
Silicon Carbide 2500 grit
8:14 scratches from the 240
13:26 scratches from the 1k
18:51 scratches from the 2500
I created this video with the RUclips Video Editor ( / editor )
I had to go back and watch this . These stones seem like an affordable option to diamond. Thank you for the info.👍
Exactly why I chose them. Anything to get me away from diamonds, is a welcome respite.
Thanks again. Very helpful info.
Looks like a fellow can skip the 1k and get along with just the two grits. Good demonstration and great technique.
Absolutely!
That 2500 grit seems especially good. A Norton Crystalon is much coarser than these stones from what I see and the Gritomatics perform like good water stones vs an oilstone.
They do behave like water stones. I have many more recent videos using them, but my initial impression was high. They have become my go to stones, for most cpm steels
They seam like a great set jef.as you say it will be great to see them work on super steels.someone must have an old busted knife they could donate to science,it would help mankind. Lol😜☘
I may get my gf's new LUDT in m390 and put it to the stones
Jef Jewell you lucky man.my wife would bust my nose for touching her stuff.lol😜☘
Jeff, how would you compare the 240 sic stone to the american mutt stone?
Mutt doesn't release abrasive. Not much at any rate. Due to that fact, I think the Mutt will wear slower. The mutt seems to be much faster in terms of grinding steel, although the 240 wasn't slow. They both absorbed water in about the same amount of time, and held it as well. I really can not think of any scenario where one will shine better than the other.
What is your current favorite coarse stone? Are any of them significantly better than the Norton Crystolon?
Norton Crystolon is one of them. If I had to choose only one, however, it would be the Shapton Pro 120. My biggest gripe with it, is how quickly it deforms. It sheds grit just as quickly as it cut steel.
@@Jef Jef, I love a genuine sharpening channel. If you were to choose a coarse stone for softer steels and a coarse stone for harder/super steels, what would they be?
I've always used mineral oil or baby oil with silicon carbide stones. I tried water and it seemed to cause excessive dishing (this might have more to do with my skill level at that time).
Me too. However, these seem to work just fine with a quick 5 minute soak.
The lubricant depends more on the bonding agent or method than the abrasive. Most SiC stones are sintered (e.g. Norton Crystolon), and release little or no abrasive, so oil works better to reduce friction and carry swarf. SiC is also found in Sigma Select Japanese stones, where fresh abrasive is readily released, so water is recommended.
Do you know of any of the issues with using these SiC with softer steels?
Issues? Like what? They treat all steel pretty much the same. Maxamet grinds just as easily as 440a
On the website they mention they aren’t recommended for softer metals. Just wanted to know if you had any issues
@@tayloralbrecht8362 I don't know who they had writing their "descriptions" but it is nonsense. They work just as well with aus8 as they do s90v. They really should change that, as it is a deterrent for others to purchase.
your stropping looks way higher angled than your sharpening. the sharpening technique looks good but the stropping looks like its heavily convexing your apex
Embrace the convexity 👌
The 240 is a 600 in Japanese Waterstone ratings IIRC
There are so many grit rating it makes ya wanna pull your hair out. Appreciate the info :D
I did not recall correctly. The FEPA 220 is a JIS 240. The FEPA 400 is a JIS 600. Sorry!
How do you think the 240 grit stone compares in cutting speed to a norton crystalon?
Gritomatic is fast, but not Norton Crystolon fast. The fine side of the crystolon, is coarser than the 240. They are close, but not quite the same. I think the Norton is more friable.
I have wanted to order a couple of these stones for quite some time, but they have been listed as out of stock for several months. Now I see that they are not even listed in Gritomatic's inventory, which is a shame.
I spoke with Konstantin this morning via email. I am getting an order set up now for the 400, 600, and 2500 to be shipped from their Russia facilities. The 240, 1k, and 2.5k should be back in stock around end of January-February, but f you can't wait, email them
Someone recently mentioned they are still available on Amazon. Not sure if that is true, but worth checking into, if you are after a set. The 6x2 are being discontinued, and only the 8x3 will remain.
Thank you for your helpful and considerate reply, Jef. It's the 2500 stone that seems most useful; it does appear to release abrasive but not excessively, and I'm curious to find out if it would work well to set a true micro-bevel on high vanadium steels, fine enough to cut a clean apex whilst still allowing some aggression.
I'm not a micro bevel kinda guy, but the 2500 can leave a pretty aggressive edge, unless you strop it. That will help smooth it out a bit. If Stephan Wolf can micro bevel on a Norton Crystoon fine, and get outstanding results, I can only imagine the Gritomatic 2500 would be even better. If you do grab one, and get results you like, please keep me updated! I love passing that sort of info on
They are all in stock now. I just got the 240, 600, 1K, and 2.5K - 8”x3”.
Sounds pretty dam aggressive
Interesting stones, what size are they, 6X2?
Yes 6x2. They also sell 8x3 for a bit more $$