JKI 6K Diamond stone

[Keithpaints]

I've used the 1K for years now it is still effective, much better than diamond plates. Last year bought the 6K for tough wear resistant steels. Particularly Magnacut chef knife & folder. Because of the forging of magnacut it has fine grain you can put extremely sharp edge on it using 6K. You don't need excessive pressure, a lighter touch will refine edges with this finishing stone. These supersteels you need the right tool for the job. Use it for my Hap 40 gyuto & folder. Older beater stainless wear resistant folder. Also K390. When I got this 6K knew it would be good. Didn't know how much would be using it. Don't even waste your time with exotic steels with regular stones. It only leads to frustration. Actually JKI diamond stones are cost effective for how well they work & treated well will last long time.

 

[Barmoley]

I've used the 1K for years now it is still effective, much better than diamond plates. Last year bought the 6K for tough wear resistant steels. Particularly Magnacut chef knife & folder. Because of the forging of magnacut it has fine grain you can put extremely sharp edge on it using 6K. You don't need excessive pressure, a lighter touch will refine edges with this finishing stone. These supersteels you need the right tool for the job. Use it for my Hap 40 gyuto & folder. Older beater stainless wear resistant folder. Also K390. When I got this 6K knew it would be good. Didn't know how much would be using it. Don't even waste your time with exotic steels with regular stones. It only leads to frustration. Actually JKI diamond stones are cost effective for how well they work & treated well will last long time.

Given how relatively inexpensive and long lasting JKI 1+6K kit is, it always confused me why people refuse to buy these and then complain about high wear resistant steels. They even feel pretty good in use, not at the level of the best senthetic stones like geshin soaking stones, but not bad at all.

 

[HumbleHomeCook]

What do you use to flatten them?

 

[Keithpaints]

My 1K has very slight dip after years of use. I try to use high spots on stone sharpening. It's not enough to concern me yet. I was thinking a 140 Atoma.

Jon mentions flattening them.

 

[Just a DK]

Given how relatively inexpensive and long lasting JKI 1+6K kit is, it always confused me why people refuse to buy these and then complain about high wear resistant steels. They even feel pretty good in use, not at the level of the best senthetic stones like geshin soaking stones, but not bad at all.

i have considered the JKIs and at the end of the day went with venev due to cost…

*edit also didnt need a 6k finisher

 

[HumbleHomeCook]

@JBroida any input on flattening this line?

I'm so impressed with my recent Gesshin that I'd seriously consider these stones for my steels that require diamonds.

 

[M1k3]

What do you use to flatten them?

Can use a regular water stone, a little coarser than the diamond stones grit, to maintain flatness. If dishing is more than just minor, SiC on a hard surface will do. I've also used my SP120 and SiC to resurface my coarser, hard binder Venev's also.

 

[HumbleHomeCook]

Thanks @M1k3.

 

[Barmoley]

What do you use to flatten them?

The stones come with nagura for flattening so I would use that. Or any other nagura or coarse sic stone, or sic powder on glass or similar should work. I wouldn’t use diamond plates. It will ruin your diamond plate and waste JKI stones. You are trying to cut the resin layer so sic should work well.

 

[HumbleHomeCook]

The stones come with nagura for flattening so I would use that. Or any other nagura or coarse sic stone, or sic powder on glass or similar should work. I wouldn’t use diamond plates. It will ruin your diamond plate and waste JKI stones. You are trying to cut the resin layer so sic should work well.

Thank you.

 

[Barmoley]

i have considered the JKIs and at the end of the day went with venev due to cost…

*edit also didnt need a 6k finisher

Venev is perfectly fine too, I just don’t have experience with these. Venev also hasn’t been available for as long and is not always available. JKI stones have been there for a very long time and are usually in stock. Considering that you get a holder 2 stones, 2 nagura I think the kit is a bargain. Not to forget that you get true splash and go stones that can cut any steel and stay flat for a very long time in addition to lasting for many, many sharpenings.

 

[M1k3]

Venev Phoenix - Best bang for the buck budget option

JKI resin bonded - an overall step up, especially when you get the complete set

Vitrified Diamond - Top tier with price to match

 

[SwampDonkey]

The JKI 6k edge that came on my Okubo from them was enough to make me save that stone to my wishlist. It's lasted a long time

 

[M1k3]

The JKI 6k edge that came on my Okubo from them was enough to make me save that stone to my wishlist. It's lasted a long time

Diamond is nice. It basically makes every steel sharpen the same. Sort of like a Konami cheat code for sharpening.

"Soft stainless? Rex 121? Yeah, just as easy as simple carbon steel." - Diamond stones

 

[1315]

Nice thread singing the praises of an excellent product from JKI.
Let's keep it going: Keeping in mind that diamond is good on everything, which "high resistant steels" require diamonds?
Opinions on Sg2, or does a good synthetic do the job? Is it simply based on HRC? @Troopah_Knives @M1k3 @Barmoley

 

[Troopah_Knives]

I find that any steel with MC-type carbides (mainly vanadium, some tungsten, and niobium carbides) is easier to sharpen with diamond stones. The higher the MC-type carbide volume the more you benefit. I consider steels with more then 5-8% MC type carbides to really require diamond stones to get a good edge.

 

[jedy617]

Nice thread singing the praises of an excellent product from JKI.
Let's keep it going: Keeping in mind that diamond is good on everything, which "high resistant steels" require diamonds?
Opinions on Sg2, or does a good synthetic do the job? Is it simply based on HRC? @Troopah_Knives @M1k3 @Barmoley

I like diamonds for sg2 since it seems to get the job done quicker, but they def aren't needed.

 

[Redwax]

My 1K has very slight dip after years of use. I try to use high spots on stone sharpening. It's not enough to concern me yet. I was thinking a 140 Atoma.

Jon mentions flattening them.

Using a diamond plate to flatten a resin bonded diamond stone isn't recommended. I believe the concern is wearing out the diamond plate. Most manufacturers recommend loose SiC powder or a SiC dressing stone/nagura or larger stone which will wear down the bond but leave the diamonds intact.

For minor refreshing or removing loading I've had good results from a small amount of Barkeepers friend with a kitchen scourer or to a lesser degree a rust eraser.

 

[Keithpaints]

Yeh that's what I use to clean stone BF & small brush. Thanks for info on leveling stone.

 

[Cmfuen]

Has anyone tried flattening resin bonded diamond plate by rubbing two of them together?

 

[Keithpaints]

Venev Phoenix - Best bang for the buck budget option

JKI resin bonded - an overall step up, especially when you get the complete set

Vitrified Diamond - Top tier with price to match

Yes I checked the freehand Phoenix series awhile back looking for coarse grits for thinning wear resistant steels. Alot of their stones are small for sharpening systems. For thinning use Atoma 400 & 600. Even if careful scratches have to be taken out. I use more pressure to thin, then less with same grit to mitigate scratches.

May give Phoenix another look two sided coarse grit. I thought smaller systems stones good for sharpening jaws of gardening tools. So hand held tool stationary. Never was much for sharpening systems, you don't have the freedom of being able to sharpen anything as with freehand.

 

[Michael Browning]

Thanks @M1k3.

Pink brick 220 soaking works.

 

[harken]

These are pretty darn good at flattening and resurfacing my diamond stones. https://www.sharpeningsupplies.com/...ening-stones/products/naniwa-flattening-stone. Pretty much just SiC in block form.

 

[M1k3]

Nice thread singing the praises of an excellent product from JKI.
Let's keep it going: Keeping in mind that diamond is good on everything, which "high resistant steels" require diamonds?
Opinions on Sg2, or does a good synthetic do the job? Is it simply based on HRC? @Troopah_Knives @M1k3 @Barmoley

Not necessary, especially lower grits. When you get to the 4-6k+ grit range, I'd definitely recommend diamonds.

 

[JBroida]

@JBroida any input on flattening this line?

I'm so impressed with my recent Gesshin that I'd seriously consider these stones for my steels that require diamonds.

the big pink 220 stone we have is generally what i use

 

[HumbleHomeCook]

the big pink 220 stone we have is generally what i use

I reckon that's a good enough endorsement.

Thanks Jon!