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New products - Edge Lab
Forum: Edge Sharpness Testing
Last Post: Mike Brubacher
05-01-2021, 05:26 PM
» Replies: 9
» Views: 243
Precision Sharpness Testi...
Forum: Edge Sharpness Testing
Last Post: Willy
04-08-2021, 07:45 AM
» Replies: 12
» Views: 2,107
NEW - E LAB A & B
Forum: Product Showcase
Last Post: Mike Brubacher
04-05-2021, 03:34 PM
» Replies: 0
» Views: 121
BESS Sharpening Competiti...
Forum: Relevant General Discussion
Last Post: blgentry
03-30-2021, 12:59 PM
» Replies: 0
» Views: 68
My Sharpening and knife r...
Forum: Relevant General Discussion
Last Post: Ken S
03-13-2021, 08:21 AM
» Replies: 70
» Views: 24,215
How we check the quality ...
Forum: All About Edges
Last Post: Ken S
03-13-2021, 08:05 AM
» Replies: 1
» Views: 153
Deburring for a Toothy Ed...
Forum: All About Edges
Last Post: KnifeGrinders
03-12-2021, 01:43 PM
» Replies: 13
» Views: 495
Sharpening story - pesky ...
Forum: All About Edges
Last Post: MaxtheKnife
03-10-2021, 08:34 PM
» Replies: 7
» Views: 2,686
Viel Variable Speed Motor...
Forum: Relevant General Discussion
Last Post: Rick Kr
03-07-2021, 09:09 PM
» Replies: 23
» Views: 12,567
Throwing Axe Handles
Forum: Relevant General Discussion
Last Post: MaxtheKnife
02-26-2021, 06:02 PM
» Replies: 2
» Views: 150

 
  NEW - E LAB A & B
Posted by: Mike Brubacher - 04-05-2021, 03:34 PM - Forum: Product Showcase - No Replies

This is a copy of the E LAB A & B page taken from the EOU website at edgeonup.com. The links below are not functional but they are on the E LAB page
here: https://www.edgeonup.com/Edge-Lab.htm

[Image: BESSEX%20E%20LAB%20Page.jpg?raw=1]

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  New products - Edge Lab
Posted by: SHARPCO - 04-03-2021, 01:15 AM - Forum: Edge Sharpness Testing - Replies (9)

https://www.edgeonup.com/Edge-Lab.html

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  BESS Sharpening Competition on BF
Posted by: blgentry - 03-30-2021, 12:59 PM - Forum: Relevant General Discussion - No Replies

Over on blade forums there's a big thread of some guys that are doing a competition to see who can get the lowest BESS score on a blade.  I haven't really bothered to read any of it, but I thought someone here might be interested:

https://www.bladeforums.com/threads/any-...n.1781350/

Brian.

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  How we check the quality of sharpening
Posted by: KnifeGrinders - 03-13-2021, 12:36 AM - Forum: All About Edges - Replies (1)

Since I saw Mike's experiment, I've always wanted to repeat it on a razor sharp knife.

[Image: 2kgLoad.jpg]

The photo shows Mike’s experiment with perpendicular load on a shaving-sharp 160-BESS edge with a flat end of a hardened steel rod:
2 Kg load on a hardened 5/16" steel rod did not effect the burr-free edge of a mid-range Henkel chef's knife - the same BESS reading and unchanged optical microscopy.

We see the same strength in our rental knife of 61 BESS -




The video shows how we check that the sharpening method is right. It goes without saying that we do not subject each sharpened knife to all this checks.

The Victorinox SWIBO Chef's knife in my video is sharpened at 12 dps and shows 61 BESS before and after the 2kg impact, and this is really impressive how strong a cleanly deburred edge is.
We filmed this episode by a single long shot.
A new Gillette razor scores 50 BESS, but of course is nowhere near as strong as the knife edge.

Key to the edge longevity, to the lasting razor edge on your knife, is to clean it of all the metal deformed in grinding.

[Image: load_2kg_explained_s.jpg]

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  Deburring for a Toothy Edge
Posted by: danforth - 03-03-2021, 09:39 PM - Forum: All About Edges - Replies (13)

For you belt guys, I'm looking for recommendations on my final stropping/deburring.

Here is my typical progression:
1. Cubitrion II 120 grit
2. Trizact A30
3. Leather belt (smooth side) with green buffing compound

It gives a very sharp edge, but I find even with feather pressure, the green compound, while it assists it removing the burr quickly, polishes the apex of the edge. I'd like to preserve the tooth as much as possible.

I'm looking for input and discussion on options for step 3 above (or possibly adding a fourth step). Here are some I've thought about

Changing a step:
3. Use a leather belt (or other belt) loaded with CBN or diamond compound to maintain the tooth and assist in deburring without polishing action. Any suggestions on brands or micron size?
3. Use a finer or coarser buffing bar to control the rate of polishing action. Any recommendations on types? I think I am going to abandon the honing compound, personally. At least as far as tooth preservation is concerned.
3. Use a different speed SFPM for the final step so the polishing action is not occurring as rapidly. Could this reduce the effectiveness of the burr removal?

Adding a step:
+ 4. additional trailing pass on each side using a medium ceramic rod or ultra fine diamond rod. This works very well to restore tooth to the polished part of the edge. But really it is just undoing what has been done.
3/4. use scotch brite to deburr followed by plain or coarse side leather. I take it this is the approach many are using right now, and perhaps it is also the best. No compound and just use a two-belt deburr process.

I'd love to hear from those using CBN or diamond compounds for deburring and also those using scotch brite or felt belts do deburr. The SB I find gives fairly rapid burr removal. Felt I find has not produced quick or consistent removal.

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  Throwing Axe Handles
Posted by: MaxtheKnife - 02-24-2021, 07:40 AM - Forum: Relevant General Discussion - Replies (2)

hello everyone

today i have a question and i need opinions and suggestions or advice.

one of my newest knife exchange customers is a big sports complex, i supply the kitchen knives on a bi-weekly exchange and they also have 4 axe throwing bays (booths) and i have a 10 axe bi-weekly exchange also.

the problem is they charge like 24.00 per hours per person to throw my Cold Steel Competition throwing axe at a wooden target and 99% of these people have no clue on how to throw and axe (nor do i)..............this leads to many many broken wooden axe handles.  they are open from wed thru sunday and every wed i call in the morning to see how many were broken.  so in 5 days of throwing 10 axes, they break from 4 to 8 per 5 day period.

i have been using Cold Steel replacement handles (hickory from asia) and i bought some nice Tenn. hickory handles to see if they would last any better..........NO.

they decided to try a fiberglass handled axe from Kobalt to see how they hold up.  they did hold up, but they would fly all the way back at times to the person throwing...........down the river with that plan.

i have sharpened many throwing axes for other customers before this exchange came along and most used same type of wooden handled axe or many used the Estwing steel campers axe..............a bit pricy compared to the Cold Steel wooden...............not sure on the bounce back part.................but at the cost of the handle and removing and replacing the broken wooden one every 5 days has become expensive for us both.

let me know your thoughts on all of the above..............thanks



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  Why shaving razors dull
Posted by: KnifeGrinders - 01-31-2021, 02:51 PM - Forum: All About Edges - Replies (7)

The most comprehensive discussion I've ever read about the shaving razors - post https://bladeforums.com/threads/is-micro...s.1769466/

I've learnt that of the multiple factors dulling the razor, the main is water salts deposited when it dries.
Now after use I blow the water out of my cartridge razor with my wife's hair dryer.

I've also finally learnt the shaving razor composition and hardness:
12-13 % Cr and 0.6 % C, heat treated to around 62-3 HRC

I was impressed by how 1 short comment by Todd Simpson invalidated that complex scanning electron microscopy experiment on cutting the hair that chipped the razor.

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  Phone applets for sharpening knives on budget wet grinders
Posted by: KnifeGrinders - 01-28-2021, 11:18 AM - Forum: Product Showcase - No Replies

We've developed iPhone and Android applets for sharpening knives on popular slow wet grinders.
Some of these budget grinders have advanced features absent in Tormek.

WEN BG4270 - reversible rotation
Thanks to the reversible rotational direction of the WEN, you can use our software for both the grinding and honing wheels, and get an exceptional sharpness on your knives.

video https://youtu.be/00JYFMimU18

Holzmann NTS 250PRO - variable speed
This machine attracts by variable speed. Actual grinding wheel speed is 90-160 RPM

video https://youtu.be/9axTxxa5-iE

Scheppach, all models

video https://youtu.be/ae6nRAWKuRU

Record WG250 & WG200

video https://youtu.be/e8m1VaO75Ts

Jet JSSG-10

Details on our website http://knifegrinders.com.au/11Shop.htm

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  Knife Grinders and AKM Propose New Study
Posted by: Mike Brubacher - 01-22-2021, 10:09 AM - Forum: Edge Sharpness Testing - No Replies

Knife Grinders and Australian Knife Magazine, in conjunction with CATRA, are proposing a new and comprehensive study  of the cutting attributes of various knives.  The following is a link to the Australian Blades Forum where additional information may be found.

https://www.australianbladeforums.info/f...ine/47288-

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  polished edge vs toothy edge
Posted by: BillMoody1 - 01-14-2021, 02:43 PM - Forum: All About Edges - Replies (1)

Brian Gentry just put up a new youtube video on polished edges vs toothy edges. 
Thought I'd just drop a line to make you aware of it; sure has been quiet around here
lately. Where's everybody? Smile

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