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What speed are you running with the Actirox? I gotta get a mister/wet grind system set up since I grind most post HT and do super thin kitchen knives.
 
Taz said:
What speed are you running with the Actirox? I gotta get a mister/wet grind system set up since I grind most post HT and do super thin kitchen knives.
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I'm running them at about 2700 fpm if my calculations are correct...
 
REK Knives said:
Wet grinding has its advantages... 1 Actirox took on 20 hardened (63hrc) cruwear blanks (rough grinding)

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Recently put my actirox to the test with 3 kitchen knives I'm working on one 10v 180mm nakiri, one 10v 230mm gyuto, and one k390 240mm gyuto.

They did do very well, but I can't think of many things that would put a lot more wear on belts. Besides if they were all 71 hrc rex 121 or something.

Anyway, since I did all the grinding after hardening, which includes distal tapering from 3.5mm to a very thin tip, then grinding the bevels. I'd say I went through 1 actirox per knife, and then I had to go fet more belts from a local place to finish the grinding. They only had combat abrasives shredder belts (well, they also had norton blaze... For $15 a piece!!!), so 1 of those each per blade also (36 grit) before i could start going up in grit.

Honestly the shredders did a lot better than I remember them doing the last time I tried them. If I end up finding them for a better price than I can get for my vsm belts then I will switch over to those.

Anyway. Long story short I went through all my actirox pretty quick making big blades with 10v, and k390. But they did pretty well all things considered.

I reground my 15v paramilitary 2 with them in just a few minutes. So they definitely can eat steel quick.
 
Blankblank said:
Recently put my actirox to the test with 3 kitchen knives I'm working on one 10v 180mm nakiri, one 10v 230mm gyuto, and one k390 240mm gyuto.

They did do very well, but I can't think of many things that would put a lot more wear on belts. Besides if they were all 71 hrc rex 121 or something.

Anyway, since I did all the grinding after hardening, which includes distal tapering from 3.5mm to a very thin tip, then grinding the bevels. I'd say I went through 1 actirox per knife, and then I had to go fet more belts from a local place to finish the grinding. They only had combat abrasives shredder belts (well, they also had norton blaze... For $15 a piece!!!), so 1 of those each per blade also (36 grit) before i could start going up in grit.

Honestly the shredders did a lot better than I remember them doing the last time I tried them. If I end up finding them for a better price than I can get for my vsm belts then I will switch over to those.

Anyway. Long story short I went through all my actirox pretty quick making big blades with 10v, and k390. But they did pretty well all things considered.

I reground my 15v paramilitary 2 with them in just a few minutes. So they definitely can eat steel quick.
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Thanks for sharing! Yeah 10v fully hardened on a big blade like a kitchen knife would be no fun at all haha. I will say that since I was using flood coolant I was able to use high pressure which they seemed to like. I would also force fracture then with a diamond dressing stick after about 10-12 blades to freshen up the abrasive action which does certainly help.
 
How is 10V to grind compared to S90V post HT? I've done some large Shechita in CPM 20CV and S90V. The CPM 20CV was 18" x 2.4" blade width and was about 12 hours start to finish, all grinding when hardened. I started grinding a 5" x 2" S90V shechita after they were hardned to 60-61, looked at the 2, 18" x 2.5" blade versions and said NOPE! Ordered more S90V and ground them pre HT this time. I did grind out 4 of the 5" x 2" Shechita from hardened S90V and that was around 20 or so hours for the 4 blades. I am cutting up the 2 hardened larger blanks and making smaller blades out of those. Smaller, narrower blades like hunting knives, bird and trout, etc aren't super bad grinding wise, but the wider blades really suck!
 
REK Knives said:
Thanks for sharing! Yeah 10v fully hardened on a big blade like a kitchen knife would be no fun at all haha. I will say that since I was using flood coolant I was able to use high pressure which they seemed to like. I would also force fracture then with a diamond dressing stick after about 10-12 blades to freshen up the abrasive action which does certainly help.
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I also do the grinding with watercooling.

I don'f have a diamond dressing stick, so I just use a piece of steel to fracture the abrasive when it needs it.

I would like to get something with diamond to use. If not for these, then for trizact ot whatever structured abrasive belts I try in the future.
 
Taz said:
How is 10V to grind compared to S90V post HT? I've done some large Shechita in CPM 20CV and S90V. The CPM 20CV was 18" x 2.4" blade width and was about 12 hours start to finish, all grinding when hardened. I started grinding a 5" x 2" S90V shechita after they were hardned to 60-61, looked at the 2, 18" x 2.5" blade versions and said NOPE! Ordered more S90V and ground them pre HT this
time. I did grind out 4 of the 5" x 2" Shechita from hardened S90V and that was around 20 or so hours for the 4 blades. I am cutting up the 2 hardened larger blanks and making smaller blades out of those. Smaller, narrower blades like hunting knives, bird and trout, etc aren't super bad grinding wise, but the wider blades really suck!
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It should be similar to grind. I haven't used s90v, so I can't comment.

But also, rather than being in the 60-61 on hrc like you generally see s90v, the 10v I'm grinding is around 65hrc, and the k390 is at 67 hrc. So that could make a little difference too.

Though, s90v does have around a 21% carbide volume (from what I can find, that number could be completely wrong) 10v should have around a 17.5% carbide volume, and k390 should have around 17%. Some of the carbide volume in s90v should be vanadium enriched chromium carbide, while all, or nearly all will be vanadium carbide for the other two, so then end up having similar wear resistance even with a little smaller of a carbide volume.
 
Good to know! I have figured out S90V after doing a few blades in it, so I feel better about trying some of the other super steels! I grind Magnacut at 64 HRC and that is MUCH easier than S90V! Carbides and type of carbides play a big roll!
 
"One of those, but with that."

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Lorien said:
there are a few things I like about Richlite;
- manufactured in my region of the continent from locally sourced materials
-made using completely recycled paper and cardboard
-non toxic and at worst smells like cardboard
-dimensional stability throughout a wide range of temperatures
-colour palette is pretty conservative, but there are plenty of options
-buy direct from the manufacturer

...man, I can think of more but I still haven't completed a handle from it yet so I should probably chill out on the evangelizing. Let's say that the reasons above are why I'm interested in incorporating it into my work on a regular basis, so long as it works well and over the long term as handle material
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One correction concerning safety with richlite, it’s made with phenolic resin just like most industrial micarta and while it’s considered nontoxic in its solid form the dust can be very toxic and a respirator should absolutely be worn while working with it.
 
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