I was sent an 8K Edge Pro Stone in a 400 box. What Material ?

Wowbagger

Wowbagger

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I ordered a 400 SiC Edge Pro stone.
What came in the box marked 400 SiC is an 8,000 stone.
When I lay the white strip of card packaging over the stone the stone looks to be very light green. The back of the aluminum plate is engraved with one of those hammer / vibrating engravers this way :
C 8 8,000
​
I suppose the "C" could be an extremely poorly formed "G"; there is a little tail on the upward curl but it is going to the right and angling down at a 45° angle. I only say this because a stone I saw in a photo is labeled "G 8".

What material do you suppose this is ? ? ? ?

I don't really need an 8,000 stone. I get hair whittling edges off my Shapton Glass 4,000 stone and it looks from a distance mirror like enough for me.

In fact some one gasped a bit when they saw the light glint off one my knives the other day and asked if I had sharpened it myself.

On the other hand I am used to sharpening my woodworking hand tool edges to Shapton Pro 8,000 which is pretty darned close to a mirror so it isn't like I won't enjoy using this new 8,000 stone.

As far as I can tell, for about 20 some dollars, I received a stone worth between $50 and $80.

Heck I might even send it back (yeah I'm lying again) but they no longer even list the SiC 400 stone that I ordered . . . even in my search history . . . how screwy is that ? ? ? !
I still want to order the SiC 400 ! Who do I go to to get one ?

They list a whole range of SiC stones but it goes from F220, F320 to F600.
I was ordering one marked "Boride" CS-HD in the SiC 400 but the ones above and the SiC 120 (F120), that I also ordered at the same time and received, was also marked "Boride" etc but from a different brand name or some such. It has been four or five days now and like I said I can't even bring up the stone I ordered at the vendor any longer.

?????

So anyway what do you think this very light green 8,000 that I ended up with is made of ?
I've been searching and searching the vendor's site but haven't stumbled across the same color stone as I have.

PS: it just occurred to me to look for images on Google so :
My stone is quite a bit lighter green than the one at this LINK>>>>
but not as yellow as the stone at this LINK>>>>

PS : one other thing I remember now is that the 400 that I ordered was marked "USA" and the 120 was marked Russia.

PPS: hold the phone ! ! !
I went to look at the packaging again to see if the 8,000 I got is USA or Russia and . . . surprise, surprise the box had a bar code for a 400 stone but the card under the stone says :

Suehiro G 8 8,000 Sha...g​

just exactly like that. What does "Sha...g" mean ?

Is this thing going to be worth a darn for M4 steel or HAP40 etc ?
I actually got the 120 and the 400 for trying on S110V ala Ankerson. :cool:
Obviously I won't be using this green 8,000 on S110V.
 
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OK hopefully you will let me post this for info sake.
In my vendor browsing history the 400 is not listed but in my computer history it is listed clearly as a link to a 400 stone.
I clicked on my computer 400 history and this is what came up LINK>>>>
No 400 see what I mean
 
OK for those who just have to find out how this soap opera turns out
I went back to search for Russia made SiC stones and wound up searching for anything Silicon Carbide that would fit in an Edge Pro and found the stone I received called out as :

Suehiro G8 Silicon Carbide Sharpening Stone for Edge Pro with Aluminum Mounting 8,000 grit

That clears that up. Apparently the color varies a fair amount. Yes they are both Gritomatics; the one I found at the vendor and the one I received.

I thought I was going insane that I saw the stone listed as made in Russia but at this LINK>>>> this one does say Russia.
:(:( but no 400 :(:(
 
Good thing I like talking to my self.
I cleared it up. The old 400 is the new 600 (or some sheeeeet).
This was listed at the last link :
RENAMING ATTENTION
Gritomatic synthetic stones made of silicon carbide and aluminum oxide can be labeled in either FEPA-F or JIS grit scale. To make grit uniform and customer-friendly, we have started the transition to the Japanese (JIS) grit scale for all Gritomatic waterstones. Old naming: F 120, F 220, F 400, F 600, F 1000. New naming: 120, 240, 600, 1000, 2500.
Click to expand...

So is it true that the 600 is the old 400 and the new 600 will be exactly the same as our man Ankerson uses on the S110V ? ? ?
 
And just to make it extra fun they list a Gritomatic 320 at the vendor but not on the Gritomatic website . . . at all . . . in FEPA-F or JIS.
Now isn't that special :)
Should I get the 320 to be as close as possible to the old 400 that Ankerson uses ? ?

I would like to say for the record that my brain now hurts.
 
hahahaha
It gets better. Just when you think you can't stand any more fun we have . . . on the same vendor site just different pages :
  • 600 grit FEPA-F (9 micron)
  • 600 grit JIS (18 micron)
Maybe 600 is a range between 9 and 18 ?
No where on either pages was 400 listed but we have 600 as FEPA-F and JIS maybe they sold out of old 400 and it is no longer listed. That was quick work usually it is just listed as no longer available / we don't when or if it will be available again.
Close enough ?
What micron is Ankerson's 400 ?
 
lol, you're going to answer your own question (maybe you already have).
I'm subbing for some EdgePro info I'll catch up on later. Thanks.
 
Yes, my brain is starting to hurt reading all the messages from one guy... But it looks like if we wait long enough he will figure it out and let us know every step in the process! :D Just ribbing you WB!

BTW there is a Gokumyo series made by Suehiro - maybe that's what the "G" stands for? Although there's no 8,000 in that series I don't think. So maybe the G is for Gritomatic?
 
You are correct in that gritomatic have been moving their grit ratings from FEPA -> JIS. What grit rating did the original stone you are after use? Was it a gritomatic or boride stone? If it was FEPA then 400 grit FEPA is 1000 JIS
 
If you received an expensive stone in error, I encourage you to do the moral thing and return it. I am confident that Konstantin of Gritomatic would do this for you if the shoe were on the other foot, and they say. He is a member here, and it is quite disrespectful to merely take this as a windfall without considering his expense.
 
Wowbagger, don't hesitate to contact me. We never ask to make a return in such cases. You can help us to identify why you've got the wrong stone. If the mistake was made on our side, there should be punishment. :)

Can you email photos of your stones and product labels to me? (km /at gritomatic.com)

Looks like you have Suehiro G8 8000 and Gritomatic SiC 120, but I want to be sure.

G8 is the good stone. Probably the best synthetic for S110V in ultra-fine range. G comes from green [silicon carbide].

(Boride CS-HD 400 is out of stock, Amazon and Gritomatic hides out of stocks variants)
 
Wowbagger said:
OK for those who just have to find out how this soap opera turns out
I went back to search for Russia made SiC stones and wound up searching for anything Silicon Carbide that would fit in an Edge Pro and found the stone I received called out as :

Suehiro G8 Silicon Carbide Sharpening Stone for Edge Pro with Aluminum Mounting 8,000 grit

That clears that up. Apparently the color varies a fair amount. Yes they are both Gritomatics; the one I found at the vendor and the one I received.

I thought I was going insane that I saw the stone listed as made in Russia but at this LINK>>>> this one does say Russia.
:(:( but no 400 :(:(
Click to expand...


G8 is easily my favorite finishing stone for most stainless with exception of high VC. Fantastic.
 
Mr.Wizard said:
What do you prefer for carbon, and high VC?
Click to expand...


Hands down for high VC it has to be diamond. I normally don't run high VC steels to a bright finish, but sometimes will use a finishing stone to create a microbevel over a coarse or medium finish on these steels - DMT EEF.

For my carbon woodworking tools, the Suzuki Ya house brand (IDK who manufactures them - a Japanese firm) 1k, 4k, 8k.

The G8 works great on everything really, but the Suzuki Ya 8k is just that little bit better.

For most of my paid utility or kitchen knife sharpening I use a Foss combination stone and just microbevel with the G8 - for myself I often just use a Norton Crystalon stone..
 
https://www.gritomatic.com/products/suehiro-g8-8000-edge-pro

Looks like you got that stone.

SiC is good but the higher you go up in grit the potential for carbide tear out can happen from discussions. Not saying it's guaranteed... But yea. Diamond and cbn would be more idea in the 3-4 micron range aka 8000grit for high Vanadium steels.
But it's still possible the Vanadium is much smaller than that, so it's debatable.

I hear that if you mount some of these on edge pro blanks they are fairly decent.

https://www.congresstools.com/catalog/categories/get-subcategory/?id=27

1 x 1/8 x 6
 
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Not to derail this thread, but SiC works great on s30v. I've been using 220, 400, and 800 SiC stones lately and have been getting much keener edges than the regular EP stones. Still not too sure about higher grits, but I agree diamond/cbn might be better.
 
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Gritomatic said:
Boride CS-HD 400 is out of stock
Click to expand...
Thank you for the response and help. I will get this together in the next day or so and get back with you.

"out of stock" does that mean discontinued or temporarily unavailable ?
I still want / need a 400 SiC or it's equivalent.
Thank you again.

And hello and thanks to all who responded to help me out on this.
When it comes to SiC I'm pretty "green" (huh ? Huh ? pretend I said that in a voice like Nick Shabazz).
Seriously though I'm clueless about SiC but am going to learn.

Mr.Wizard said:
If you received an expensive stone in error, I encourage you to do the moral thing and return it.
Click to expand...
I was discussing this with a coworker today and he said what they would probably do since they could not provide the 400 replacement I want would be to refund my money and tell me to keep the stone.
I have had a similar interaction in the past.
I said I wasn't that greedy and wouldn't try to do that.

It didn't occur to me to some how pay the difference. Money is pretty tight right now; I may even be without a job in the next month or two. It was a stretch to order these two stones (120 and 400).
Honestly I hadn't figured out what to do next exactly.
Sounds like I can communicate direct now rather than try to go through Amazon so it will work out for all concerned.
 
Gritomatic said:
km /at gritomatic.com
Click to expand...
isn't being recognized on my end as a valid e-mail address.
What am I doing wrong ?
I took out the spaces and tried again.
Do I put the "km /at" in the subject line and just use "gritomatic.com" as the e-mail address ?
Thanks
 
Wowbagger said:
isn't being recognized on my end as a valid e-mail address.
What am I doing wrong ?
I took out the spaces and tried again.
Do I put the "km /at" in the subject line and just use "gritomatic.com" as the e-mail address ?
Thanks
Click to expand...
Duh I should have used "@" rather than "at".
once again . . .
 
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