I just sharpened a knife and decided to make a salad.  Someone needs to invent a edge sharpness tester so we can know how sharp our blades are before using them.  I just hate it when this happens!

I'm sure many of you have seen this professional sharpening tower...



Can anyone identify these wheels exactly?
Specifically the two on the grinder just above the belt grinder.

I read the term "professional" with the upper end of these blade sharpening systems(Wicked Edge, TSProf, etc.).

I know people use Tormek's professionally, there are numerous videos of professional blade sharpeners using them.

But I can't find actual professionals using systems like the Wicked Edge, TSProf, or others like these.

Are these systems really used professionally?

Hello everyone. 



I changed my Viel S5 to Kally. Yeah, I think it's upgrade. 

But unfortunately, I found one defect. This machine makes vibration just before it stops working.(Not during operation.) Check below video. That kally has exactly same problem. 







How do you think about that?

An interesting line of discussion came up recently in a maillist on the making of bamboo fly rods, in regard to dulling of edges.  This may be old news to knife sharpeners, but as it pertains to razors, something we use as references or standards, I found it interesting and confirming.  

Relevant discussion from the original thread is further below, immediately below are links to the source information referenced in the discussion.  

Rick

Article URL
https://www.sciencemag.org/news/2020/08/...id=3445815

Video URL
https://www.youtube.com/watch?v=6kgw6j9n...tion=share

On 8/17/2020 5:32 AM, H...V... via Rodmakers wrote:
>
>
> On 17 Aug 2020, at 14:27, T...S... via Rodmakers <rodmakers@lists.canerodmakers.com> wrote:
>
>> What they don’t talk about, and the razor companies don’t tell you is that what causes most early failure in a blade is actually corrosion. Stainless is not naturally corrosion resistant, what makes it so is a microscopically thin layer of oxide that forms on it’s surface. When you shave, that oxide wears away allowing corrosion to start. As long as the metal is exposed to oxygen in the air, the oxide layer will restore itself fairly quickly, and the steel is again protected.
>
>
> I assume that is a chromium oxide? As far as I know it is primarily the chromium content that makes stainless steel ’stainless’ - and iron oxides are, for the most part, and that includes all non-esoteric oxides, non-passivating, i.e. an iron oxide layer (aka rust) does not prevent further oxidation underneath - unlike e.g. an aluminium oxide skin on aluminium.


On 8/17/2020 5:07 AM, H...V... via Rodmakers wrote:
> Note that there is nothing special about the ‘process’ they describe - see also their introduction:
>
>> Steels for sharp edges or tools typically have martensitic microstructures, high carbide contents, and various coatings to exhibit high hardness and wear resistance. Yet they become practically unusable upon cutting much softer materials such as human hair, cheese, or potatoes. Despite this being an everyday observation, the underlying physical micromechanisms are poorly understood because of the structural complexity of the interacting materials and the complex boundary conditions of their co-deformation. To unravel this complexity, we carried out interrupted tests and in situ electron microscopy cutting experiments with two micromechanical testing setups. We investigated the findings analytically and numerically, revealing that the spatial variation of lath martensite structure plays the key role leading to a mixed-mode II-III cracking phenomenon before appreciable wear.
>
> It’s only their detailed look at what’s happening at the ‘between nano and micro’ scale, after each individual use that is (somewhat) new.
>
> So yes, this is definitely also what’s happening to our plane blades on bamboo, and to plane blades on ’normal’ wood, and to kitchen knives while cutting onions on a chopping board.
>
> Way I understand it is the extent of this process is primarily dependent on the alloy type and heat treatment of the steel. My guess is that razor blade steel is harder, more crystalline, than our plane blade iron.
>
>>
>>> On 17 Aug 2020, at 13:56, T...S... via Rodmakers <rodmakers@lists.canerodmakers.com> wrote:
>>>
>>> Dear All,
>>> here is an interesting study and especially a nice video how razer blades become dull.
>>> Perhaps same is happening to our plane blades due to the hard cane fibres.
>>> https://www.sciencemag.org/news/2020/08/...id=3445815
>>>
>>> br
>>> Tapani
>>>
>>> Rodmakers List - https://rodmakers.canerodmakers.com

Jan Svancara has passed away and it's a sad day for all of us. Jan was a founding member of the Bess Exchange and his knowledge and willingness to share with others will be missed sorely. Jan's contributions here were too numerous to count but included his work on the Rockwell Hardness Calculator which will continue to bear his name on these pages.  Jan was always thoughtful in his writings and a gentleman in every instance. Our thoughts are with his family in the Czech Republic.  We miss you already Jan.

Since Arizona has now become the most infected spot on earth, I've changed my look. My wife says that I look better. Everyone, please stay safe!

                                                                   

I enjoy rescuing old tools and giving them a new lease on life.  It's always a shame when an old tool, frozen with rust is forsaken when with just a bit of work can be born again and restored to another entire lifetime of usefulness.  Here's a couple of examples on page 1 and 2 of this post:

http://bessex.com/forum/showthread.php?t...576#pid576

I've done a bunch of them and have enjoyed much success, however nothing compared to what this guy does.

He uses a lot of time consuming hand work, but moreover, some very imaginative and inventive restoration ideas.  Anyway, I enjoyed this video where tackles a beyond all hope, mostly disintegrated old knife.  Maybe you will enjoy it too:

https://www.youtube.com/watch?v=hKV1xr2ZqJs

Here are some other hopeless, basket (trash can) cases he rejuvenated.  Pretty cool.  Scroll through the list of videos.  There are some beautiful old tools in very deteriorated condition given a new, useful lease on life.  A great demonstration of how those old, built like a tank tools can last many lifetimes...  As long as someone cares to keep them maintained or save them if they have become forlorn, abandoned and left to the dark abyss of  oblivion:

https://www.youtube.com/watch?v=UGU2DAWnOtE

We are very pleased to announce our cooperation with two new stocking distributors in Europe. Please welcome  in the UK:



                           

                                                           www.multitoolproducts.com    



And based in the Netherlands:  




English      https://www.knivesandtools.com/en/ct/edg...esters.htm

French       https://www.knivesandtools.fr/fr/ct/edge...nchant.htm

German     https://www.knivesandtools.de/de/ct/edge-on-up-schaerfetester.htm