Hapstone RS...Stone Selection?

Mr.Wizard said:
Don't misunderstand my level of experience.
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Sounds like all first hand experience that led you to the conclusion of what works best for you.
That’s the best type of experience anyways, imo.

Yeah, the sandpaper idea intrigues me. Belt would be sweet. Water cooling option even more. Or just adjustable speed enough?
Ahhhh, here I go again. It’s all so exciting in the beginner-ish stages.

Thanks for the reply again. Much appreciated.
 
huntyukon said:
Would you mind to elaborate a little on that? I’m in the market for an upgrade to what I use now, in an 80 and 120 grit. Which are jende plates (electroplated). They cut well, which I like. Yet, they’re also a bit on the rough side and can gouge a bit. So, cutting metal quick, great. Leaving ravines on the edge, may be not so great 😄. Common sense makes me wonder if fast cutting can be achieved without leaving deep scratches, at least at such low grits, but it sounds like there are better options out there though. I like my EP diamond Matrix stones in 950, 1.7k and 4K, but with anything where I want coarser than 150, I wonder if the EP Matrix would be a lot slower at cutting metal.

Thanks
Hauk
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Electroplated stones such as Jende or Hapstone Start, these abrasives are designed only to repair the knife edge well and no more, if your knife has not been in contact with combat that has caused deformation or chipping of the knife edge, I would not use electroplated abrasives.

The safest way is poltava (metal-bonded) or premium Hapstone diamond on a hybrid bond. 150 grit (100/80 mkm) and the problem of scratches will be out of the question.

Sure, the price is quite a hefty price tag, but let's say the Premium Hapstone will be cheaper and perform just as well as the PDT.
 
Hapstone Official said:
Electroplated stones such as Jende or Hapstone Start, these abrasives are designed only to repair the knife edge well and no more, if your knife has not been in contact with combat that has caused deformation or chipping of the knife edge, I would not use electroplated abrasives.

The safest way is poltava (metal-bonded) or premium Hapstone diamond on a hybrid bond. 150 grit (100/80 mkm) and the problem of scratches will be out of the question.

Sure, the price is quite a hefty price tag, but let's say the Premium Hapstone will be cheaper and perform just as well as the PDT.
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Thank you very much for your response. It sounds like I’m on the right track with your premium CBN’s. I’d be getting the correct tool for the job and still at a better price point than your competitors.

The only couple of things that intrigue me about stones by PDT are:
1) the possibility to mount the stones to my own aluminum blanks for the metallic bonded (sounds easier for the etching process?)
2) I could get them in 155x35mm width. Although I’m not certain that the 35mm wide stones would give me the advantage I think. For all I know there might be no advantage at all to going just that little wider than the typical 25mm width.

Again, thank you ver much for the response.
 
huntyukon said:
Thank you very much for your response. It sounds like I’m on the right track with your premium CBN’s. I’d be getting the correct tool for the job and still at a better price point than your competitors.

The only couple of things that intrigue me about stones by PDT are:
1) the possibility to mount the stones to my own aluminum blanks for the metallic bonded (sounds easier for the etching process?)
2) I could get them in 155x35mm width. Although I’m not certain that the 35mm wide stones would give me the advantage I think. For all I know there might be no advantage at all to going just that little wider than the typical 25mm width.

Again, thank you ver much for the response.
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1) the possibility to mount the stones to my own aluminum blanks for the metallic bonded (sounds easier for the etching process?)
I would consider the process of etching them with a thin layer of water in a bowl that the water level would not touch the aluminum blank, PDT has good blanks, I'm not sure that they need to be removed, and if still have to come with it will not be a problem, any rastoritel and blank is removed, and glued to double-sided tape 3M.
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2) I could get them in 155x35mm width. Although I’m not certain that the 35mm wide stones would give me the advantage I think. For all I know there might be no advantage at all to going just that little wider than the typical 25mm width.
In particular you are right, unless you have a large work area I would not consider buying 35mm wide diamond stones
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Thank you for clearing that up for me. I’m going to place an order for your premium stones today.
 
What 4 stone set would be ideal of the poltava metallic cbn be?
Starting with either 120 or 150?
Used for my willing pro kitchen knives
My straight razors
And folding knives
Function > form
 
gotwqqd said:
What 4 stone set would be ideal of the poltava metallic cbn be?
Starting with either 120 or 150?
Used for my willing pro kitchen knives
My straight razors
And folding knives
Function > form
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Good afternoon Dear Mr. G gotwqqd .
I would pay attention to this set

Poltava Metallic CBN Stone
120 grit (125/100 mkm)
240 grit (60/40 mkm)
800 grit (20/14 mkm)
2000 grit (7/5 mkm)

For the razor it is additionally desirable to use cow leather with a 5-6 micron paste/suspension.

If you still have questions I will be glad to help you.

Regards, Mario.
Hapstone !
 
gotwqqd said:
IF, I decided to go with 5 stones what would you suggest? 120/240/609/1000/2000?
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I would add another 400 grit stone (40/28 mkm) to my set for a good finish after coarse stones, as each sharpening stage should close the cut of the previous one.
The set would then consist of these grits
120 grit (125/100 mkm)
240 grit (60/40 mkm)
400 grit (40/28 mkm)
800 grit (20/14 mkm)
2000 grit (7/5 mkm)
 
Mr.Wizard said:
I bought my 3M diamond film from Precision Surfaces Internatinal at psidragon.com as it is the only source I know for individual pieces in a convenient 3"x6" size.
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I just checked them out, as I was looking all over to find some 3M film. Really cool!
I eventually got mine from a place called Digikey.ca in a 6”x6” format. Only $8 shipping to canada (it ships from the US) with FedEx international priority. Well, for a few sheets of paper, you’d think it shouldn’t cost all that much anyways, but I was surprised what some places wanted for shipping those.
 
Mr.Wizard said:
I bought my 3M diamond film from Precision Surfaces Internatinal
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Another question for ya. Hoping that’s alright. I just got some 3M lapping film, but I accidentally bought the version that has no PSA film on the back. Would you happen to what the 3M double sided adhesive tape is called that most use? There are so many different versions out there and it’s tough to know which type is the thinnest, when ordering online. It’s gotta be so thin that the surface has no give, since I don’t want to convex my edge. Or is there an alternative option that would work?
 
huntyukon huntyukon I don't think I can help with that. I have used an adhesive transfer tape to mount stones quickly but it wouldn't work for this as it doesn't go on entirely evenly.
 
Hapstone Official said:
I would add another 400 grit stone (40/28 mkm) to my set for a good finish after coarse stones, as each sharpening stage should close the cut of the previous one.
The set would then consist of these grits
120 grit (125/100 mkm)
240 grit (60/40 mkm)
400 grit (40/28 mkm)
800 grit (20/14 mkm)
2000 grit (7/5 mkm)
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Thank you so much for all your help! I am new to it all, only been sharpening for 6 months or so, have the worksharp but picking up the hapstone RS.

Out of your above recs, why no 1000 grit? Thank you!
 
DrW said:
Thank you so much for all your help! I am new to it all, only been sharpening for 6 months or so, have the worksharp but picking up the hapstone RS.

Out of your above recs, why no 1000 grit? Thank you!
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The jump from 800 to 100 is really small, you don't really need to do it. You can of course, but for the most part with the grits selected it would just be wasted money.
 
Thanks for the question, the transition between 800 and 1000 is small enough to achieve the desired result, and yet it will not smooth out the work in front of 2000 stones.
I don't think it's necessary to use it in this set.
 
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