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Messages - Sir Amwell

#1
Well put Ken. Couldn't agree more.
#2
Knife Sharpening / Re: Rock hard felt vs SJ-250
June 22, 2024, 08:31:08 PM
Quote from: RickKrung on June 22, 2024, 05:16:23 PM
Quote from: cbwx34 on June 22, 2024, 04:37:34 PMNot really... a felt wheel removes the burr and cleans up the edge (and can polish), while an SJ wheel will refine the edge and polish the bevel, but still leaves a burr that needs to be removed.

I'm going to be a bit more emphatic.  Definitely not, for the reasons cbwx34 says.  Following Knife Grinders deburring principles, whether I use the SJ wheel or not, I always finish using a rock hard felt wheel with 1µ diamonds (I use paste rather than spray) at some "degree" of higher angle, usually 1°-2°. 

But, now that I mention the higher angle for deburring, I'm not recalling at the moment if anyone has tried to deburr using only the SJ at one of those "higher" angles (someone must have).  I suspect it would not work to the same degree due the significant difference in abrasiveness, SJ ~ 4,000-5,000 grit, 1µ ~ 14,000 grit. 

For some reason I've hardly ever got the rock hard felt wheel to work for me. The sharpness invariably goes down and not retrievable with subsequent honing. So I'd given up on it really. I tried again using the new angle setter to see if accuracy would improve it. Same results, regardless of varying the angle.
Maybe it's my bad technique. I've posted about this in the past with mixed answers.
So I wonder if you could give a detailed overview of your technique Rick, when using the felt wheel with 1 micron diamonds?
#3
Knife Sharpening / Re: New angle jig KS-123
June 19, 2024, 12:54:36 AM
Sorry that wasn't very clear.
I noticed from the instructional video that the the protrusion was being set in the vee of the jig at the belly of the knife and thought it may be problematic as the correct protrusion should be set before the curve of the belly ( ie on the straight portion of the blade) to allow for pivoting and or raising to follow the curvature of the blade.
If you flip the knife ( handle on the left) you'll hit the vee at a straighter portion of the blade for most kitchen knives.
Can't be said of shorter blades I suppose...
Or, like Pers prototype, could one set the projection before going near the stone?
#4
Knife Sharpening / Re: New angle jig KS-123
June 19, 2024, 12:44:35 AM
If it's worrying you , you can always flip the knife over to set in the vee on the straighter portion of the blade?
#5
Just to add my pennies worth. I think Bess scores in the range of 150 (130/140/150/160/170) indicate that the burr has not been completely removed.
Whilst I gave up chasing sub 50 Bess a long time ago I still use the tester to indicate to me that the burr has been properly dealt with. I'm happy with anything under 120 and more than happy under 100.
So I think maybe you need to pay a little more attention not just to bevel angle but honing technique. The Tormek compound on leather wheel is good for most steels but harder steels really need diamonds and a very precise honing angle to completely remove the burr.
One important thing I took from studying Wootz book on sharpening is that the secret is not just achieving a true apex on a knife edge but how to remove the burr.
That is why his book is titled as it is.
#6
This does raise some questions though.
It is fairly well known I think that sharpening softer steels on CBN is inadvisable due to clogging effect.
Could the same be said of diamond?
If no then what are the properties of the two that gives rise to this?
#7
Second that.
First task in sharpening is knowing what you are dealing with.
If you can't identify the steel on a kitchen knife then assume it's of low hardness and progress from there.
At least you won't risk damaging expensive CBN or diamond wheels.
If you're not making progress on an unidentified steel you can always switch to super abrasives later.
#8
Knife Sharpening / Re: New found touch
March 07, 2024, 09:59:09 AM
Agree with last post. I never got improved sharpness using felt wheel.
These days I keep things simple. For most everyday steels I set edge on T8 on 400 grit CBN wheel. I then hone on a WSKO on the grinder attachment with leather belt and Tormek paste, first at +2 degrees and then at exact. A final hone on a hanging leather strop, no compound. I vary this for higher end (harder more brittle steels) using Vadims appendix as a guide.
I am not so hung up on sub 50 Bess anymore. I am fine with 80-110 Bess range. That tells me the burr is gone and I have a crisp clean apexed edge.
My customers are always happy with this too.
#9
Knife Sharpening / Re: New found touch
March 06, 2024, 08:11:20 PM
Quote from: BUTCHER on March 06, 2024, 03:54:51 PMAfter sharpening about 200 knives and also using them in a fast paced meat processing setting I still haven't reached or even gotten near my sharpening goals of below 100 bess. I have tried everything I have read about but I just can't reach below 140 bess on a the 15 dps knives. The edges cut really great for the first hour but then they need a lot of steeling to keep cutting well. I find i cant use the polished steel for very long because it doesnt have much of an effect on the edge. I was hoping to have better edge retention after reading Vadims research but still haven't made it there. On the plus side my edges are very consistent at the middle and tip of the knife which is very important on a boning knife and also I find it easy to sharpen with the Tormek

Hi Butcher your 140+ scores indicate that you probably haven't completely removed the burr. More over, the fact that your edge dulls quickly and requires steeling also indicates that you have a wire edge (a burr which although small lies on top of the apex). That wire edge though seemingly very sharp will roll over quickly, hence your need to steel it to return it to the centre. This wire edged burr really needs removing to get to the true apex. If you do that then you will not only have a sharper edge ( at most 120 Bess probably lower, ideally sub 100) but the retention will be better.
Try honing at a slightly higher angle initially, with diamonds preferably (. 5 micron or 1 micron). Maybe + 2 degrees for lower end knives, 1-1.5 degrees for main stream knives.
Then rehone at the exact angle you ground to. I know this seems counterintuitive but it works!
Refer to Vadims book, an appendix gives a whole list of honing protocols for different steels. You don't need to go down the paper wheels route or follow them exactly, it will give you a general idea of how to hone particular steels.
Hope this helps. As the o/p pointed out. Don't despair. You will get there in the end!
#10
Knife Sharpening / Re: Honing Steels...
January 06, 2024, 06:44:33 PM
I recommend watching the follow up video too as he tries to address the issues raised by some of the comments in the first one.
#11
Knife Sharpening / Re: Felt Wheel Deburring
January 01, 2024, 08:45:52 PM
Agree with previous 2 posts.
The felt honing wheel is designed to remove the core of the burr from the apex. After that you need to have a final clean up, usually at the exact edge angle. A hanging leather strop will also usually remove a wire or foil burr if the felt wheel has not done so.
#12
General Tormek Questions / Re: locked out
December 30, 2023, 01:02:39 PM
Sounds obvious and you may have tried already, but have you tried the quick release method?
Have the machine in front of you, USB nearest you. Hold the stone in your left hand. Now take the honing wheel in your right hand and turn it away from you whilst holding or turning the stone towards you. This usually gets things moving.
#13
Agree with all responses so far.
You say you don't want water.
Without water you will have dust.
Personally I'd prefer water to dust.
For me it's easier to clean up water than it is to vacuum the whole workshop.
And I'm not keen on trying to vacuum my lungs to free them of steel and diamond dust.
Wear a mask I hear you say.
I'd still prefer cleaning up water than wearing a mask......
#14
I don't think I'm going off topic here. I have been quoted from a previous post. I stick by those comments. I sense many may be in agreement with me, whether professional sharpeners or home sharpeners. I return to my original post. How can we as a user community put positive pressure on Tormek to do the right thing with this issue?
As a professional sharpener I would gladly invest in 6-8 new jigs that catered for self centering AND adjustable stop.
I currently use 8 of the old svm jigs ( 2 milled for thicker blades) and 1 kj45(which I rarely use).
I batch sharpen.
Imagine how much more efficient it would be with a hybrid jig?
So again, how can we get Tormek to do this?
#15
Are you using the self centring jig (kj45)?
If you are then I can only assume that the problem lies with your knife or knives. Unfortunately it is quite common for folding or fixed blade bushcraft/edc knives to have asymmetric grinds before the apex.
If you are using the old style jig (can't think off hand the model number) then it will only centre knives within a tolerance of 2-3mm spine thickness I think. Anything thinner you should increase the thickness with tape to aid centering and avoid wobble. Anything thicker requires altering (thinning) the jaws of the jig to accommodate the extra thickness and centre the knife. Knife Grinders has an informative video about this on the YouTube channel.
For those thicker knives you would probably best get the newer KJ45 self centring jig.
I tried sharpening my brother's custom made bushcraft knife and ran into the same problem. I was literally pulling my hair out trying to get even bevels but got nowhere until I realised the knife had been ground asymmetrically in the first place. Had to keep flipping and adjusting over and over til I got it right. Very frustrating!