venev and poltava diamond/cbn stones?

[inferno]

For quite some time now i've been looking for something ultra fast and aggressive that stays flat and never wears out.
and dont we all?

for flattening/thinning blades and such.

So about a year ago i found out several makers are doing "bonded" cbn and resin bonded diamonds, aka powder in plastic. And now i see they also do metallic bonded ones with diamonds and cbn. with tin/copper as a matrix.
Now most of these are for edge pro type systems so 1x6 size only. you can still use one of these as a bench stone imo.

So now i wonder if anyone here has tried any of these stones OR other brands of similar construction.

how is the speed for their grit? clog fast? estimated total lifetime? (compared to atomas/dmts/other known good regular stones).

there are quite a lot written about these stones on bladeforums. but they sharpen small knives, and they use "guided systems" and they dont really flatten/thin anything, so. and many people have the spyderco bench stones as a reference (the slowest stones in existence pretty much).



for my use (mixed stone flattening/blades) dmts last about a year, atomas the same, the diaflat i have seems to have quite a bit life left but its much slower and finer now. My buddy at work report similar lifetime of his dmts and atomas before they wear too smooth. mixed use there too.



Another alternative would be coarse regular stones that i keep ultra flat all the time. like the shapton 220/120 or some SiC stone and maybe one of the button plates from nanohone. but those plates are 500€... and the venev dual sided diamond bench stone is like a 100...

i would also like recommendations for other manufacturers of these types of diamond/cbn stones.
i know jki have their diamonds stones but for me they are too expensive. the 300 grit one is 400 bux. i'm sure its very good. it would cost me 5000SEK here after VAT now with the current exchange rate. and i could get like 7-8 atomas for this cost from germany. will it outlast 8 atomas?
https://www.japaneseknifeimports.co...nes/products/diamond-300a-stone-and-flattener

links.
https://www.gritomatic.com/collecti...al-side-bonded-diamond?variant=29978454392941

https://www.gritomatic.com/collecti...ltava-cbn-for-edge-pro?variant=29537960099949

https://www.gritomatic.com/collecti...ond-stone-for-edge-pro?variant=13932819644525

https://www.gritomatic.com/collecti...-cbn-stone-for-edge-pro?variant=1514816241688

https://www.gritomatic.com/collections/uncategorized-stones

 

[kayman67]

I can't tell about that 300 grit.
I can't tell about latest Venev 80 side. I imagine it would be faster.

But. The old Venev 100 is not aggressive enough and would dish faster than imagined. It went down looking at it.
The big CBNs were really expensive and I don't think they even make them now. The version tested by me was even slower than Venev for this.
I don't think they ever considered any of them for such usage. And after growing big muscles with 100 grit, the Aritsugu 300 made a completely smooth surface in less than a minute. It's maybe the good thing about this kind of diamond plates, very consistent finish. CBN starts a bright finish even at ~500 grit.