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#81

Knife Sharpening / Re: How to achieve less than 1...

Last post by jimon - May 10, 2024, 09:14:08 AM

I agree. I guess it will be difficult to get lower BESS on this set (SG+honing weel)
I tried to play with the honing angles (probably on hands, not at fixed angle), but be honest, I didn't see a difference.
I think that the SG stone + leather wheel with Tormek paste giving just like my results.
And for lower BESS rates need to use felts, wool, diamond sprays, etc.

Thank you all for your comments - if anything in my process will change - I will let you know.

#82

Knife Sharpening / Re: USB Height and positioning...

Last post by cbwx34 - May 10, 2024, 04:58:28 AM

What is the best practice to try and ensure the KJ-45 (or similar) is holding the blade level?  In other words so that for the most part the blade is perfectly horizontal.  Do people use a guide or jig?  Just eyeball it?

Sorry, not entirely sure what you mean. If you mean parallel to the surface of the wheel then the contact with the wheel does that. In addition if the water is flowing evenly over the knife then it is contact the whole way across.
If you mean at right angles to the edge of the wheel then that is not really as critical so just eyeball it as you say.

I think you understood it better than I did... 

Yeah, if you mean level across the stone... watch how the water flows over the knife.

#83

Wood Carving / SVD-186R for large bent gouges

Last post by MerryMadMick - May 10, 2024, 03:22:32 AM

Hello,

Is there an optional (wider) tool holder for the SVD-186R?  Quite a few of my most used bent gouges are 40mm+ and are too wide for this jig.  I did get a decent edge free-handing using the SVD-110, but if I can get the SVD-186R to work it would be more ideal.

Thank you.

#84

Knife Sharpening / Re: How to achieve less than 1...

Last post by John Hancock Sr - May 10, 2024, 01:41:36 AM

I'm not a BESS fan... but according to this post, a 13-15 dps edge should be able to achieve a lower score.

I'm with you. There are a lot of factors that affect BESS score, including your testing technique.

Tests have shown that after a few minutes of use you typically end up at about 160 BESS so anything below this is probably acceptable. The SG-250 and leather wheel with the Tormek compound will never give you scores below 100. You need to go to the SJ-250, DE-250 and manually stropping or other diamond infused strop to get really good scores. Not to mention lower sharpening angles also lowers the BESS scores, but obviously the trade of with lower angles is more fragility.

Interestingly Bazz from Findon Sharpening has made a few videos showing him experimenting various techniques getting low scores where he uses the SJ and a manual strop charged with compound.

#85

Knife Sharpening / Re: USB Height and positioning...

Last post by John Hancock Sr - May 10, 2024, 01:22:20 AM

What is the best practice to try and ensure the KJ-45 (or similar) is holding the blade level?  In other words so that for the most part the blade is perfectly horizontal.  Do people use a guide or jig?  Just eyeball it?

Sorry, not entirely sure what you mean. If you mean parallel to the surface of the wheel then the contact with the wheel does that. In addition if the water is flowing evenly over the knife then it is contact the whole way across.
If you mean at right angles to the edge of the wheel then that is not really as critical so just eyeball it as you say.

#86

Knife Sharpening / Re: How to achieve less than 1...

Last post by RickKrung - May 09, 2024, 06:40:00 PM

...snip..
This video demonstrates how to get low BESS readings using standard Tormek equipment.

https://youtu.be/UckPmizllk0?si=jb6f3UwgOOq8JTFC

Please note at just after 1:15 the targeted bevel angle setting used on the applet, 10 degrees. (10 degrees per side). What bevel angle are you using when you sharpen?

...snip...
Ken

...snip..
If it is in the sharpening, one thing you might try, instead of changing the sharpening angle, adjust the honing angle a bit higher, and see if makes a difference.

Couple things. 

1) Honing angle that I saw in that video was 12º DPS rather than 10º.  However, I do not think that what the angle is, is as relevant as the differential between grinding and honing angles, per what follows. 
You cannot view this attachment.

2) I definitely agree with raising the honing angle for typical home use knives (which is all that I have), based on Vadim's other work regarding techniques for deburring steels of different hardness.  While Vadim's video was intended to show what is possible with standard Tormek equipment, it appears to also reflect what I assume is the Tormek method of using the same ange for honing.  The reference video appears to have been posted in 2019, which is AFTER the fourth edition of Vadim's deburring book where he discusses the benefits of using varying honing angles for different types of steels. 
You cannot view this attachment.

It was demonstrative that he was able to achieve 75 BESS by using the same angle.  I am curious what he could have demonstrated if he had used an angle more specific to the type of steel being sharpened Maybe he did without saying anything about it, so maybe it wasn't relevant, but it would have been informative for him to have mentioned it (unless he did at some point that I didn't see, as I didn't watch the video from start to finish).

Rick

#87

Knife Sharpening / Re: USB Height and positioning...

Last post by cbwx34 - May 09, 2024, 05:26:56 PM

1) As a practical matter what is the maximum height of the USB to the top of the machine?  Based on some of the calculators it looks unlikely it would exceed 200mm but I am looking for real world correlation.

2) What is the best practice to try and ensure the KJ-45 (or similar) is holding the blade level?  In other words so that for the most part the blade is perfectly horizontal.  Do people use a guide or jig?  Just eyeball it?

1) Depends on the machine and which USB you have, but on a T-8 with the standard USB, you're pushing the limit at around 180mm on the vertical side.

2) Pinch the clamp closed so it "forms" around the knife, then loosely tighten the front screw, then the back one till it holds the blade in place.  That should keep it centered and straight with the clamp.

#88

Knife Sharpening / Re: How to achieve less than 1...

Last post by cbwx34 - May 09, 2024, 05:19:25 PM

I'm not a BESS fan... but according to this post, a 13-15 dps edge should be able to achieve a lower score.

Personally, I think BESS use is subjective, and it could just as easily be something in your testing technique, as it is in the sharpening.  I'd look at other factors... like, for example, what you wrote earlier, in how it performs in actual use.

If it is in the sharpening, one thing you might try, instead of changing the sharpening angle, adjust the honing angle a bit higher, and see if makes a difference.

#89

Knife Sharpening / Re: How to achieve less than 1...

Last post by jimon - May 09, 2024, 04:30:19 PM

Thank you Ken,

I saw this video, and my results still around 150 bess. I guess the reason of this my angle on bevel  - it is depends from knive, and usually is 13-15 degrees on bevel.

May by I will try to do 10 degrees for the experiment, and it will takes low pressure on BESS, but also want to achieve a higher sharpness without lowering the sharpening angle.

#90

Knife Sharpening / Re: How to achieve less than 1...

Last post by Ken S - May 09, 2024, 02:43:46 PM

Welcome to the forum, Jimon.

This video demonstrates how to get low BESS readings using standard Tormek equipment.

https://youtu.be/UckPmizllk0?si=jb6f3UwgOOq8JTFC

Please note at just after 1:15 the targeted bevel angle setting used on the applet, 10 degrees. (10 degrees per side). What bevel angle are you using when you sharpen?

The demonstrator in this video, our late member,"wootz" (Vadim Kriachuk of Knifegrinders of Australia) was a very dedicated sharpener and researcher. He developed a very refined technique as shown in his numerous you tube videos

Personally, I would not feel comfortable using a 10° bevel.

Ken