Author Topic: First results with SJ-250: moderate burr  (Read 1421 times)

Offline Cyrano

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First results with SJ-250: moderate burr
« on: July 06, 2018, 03:26:38 am »
Tormek recommends not using the leather honing wheel after using the SJ-250. In my initial results, I'm seeing a moderate burr, and a BESS score higher than I can get with proper use of the leather honing wheel.

Are there special techniques that should be used with the SJ-250 to get an edge which requires no honing?

This Cold Steel folding knife has a blade made of CTS XHP, and was sharpened at 12 dps on the SG-250/220, SG-250/1000, and SJ-250:




Offline wootz

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Re: First results with SJ-250: moderate burr
« Reply #1 on: July 06, 2018, 04:29:35 am »
We read the Tormek recommendation as "Do not use Tormek honing paste after the SJ because it is of a coarser grit than the SJ".

Offline Ken S

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Re: First results with SJ-250: moderate burr
« Reply #2 on: July 06, 2018, 02:22:29 pm »
Good point, Wootz.

Ken

Offline cbwx34

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Re: First results with SJ-250: moderate burr
« Reply #3 on: July 06, 2018, 03:10:34 pm »
Tormek recommends not using the leather honing wheel after using the SJ-250. In my initial results, I'm seeing a moderate burr, and a BESS score higher than I can get with proper use of the leather honing wheel.

Are there special techniques that should be used with the SJ-250 to get an edge which requires no honing?

This Cold Steel folding knife has a blade made of CTS XHP, and was sharpened at 12 dps on the SG-250/220, SG-250/1000, and SJ-250:


Try a light / alternating pass or two at a higher angle... enough to remove the burr (without creating a significant, if any, micro-bevel).


Offline Grizz

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Re: First results with SJ-250: moderate burr
« Reply #4 on: July 06, 2018, 09:11:16 pm »
are you using the SJ-250 towards the blade or away from the blade? turning towards the blade will reduce the amount of burr.

Offline Grizz

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Re: First results with SJ-250: moderate burr
« Reply #5 on: July 06, 2018, 09:14:14 pm »
if small amount of burr is still present, break open a paper beer box and gently hone on a strip of the inside of the box a few times.

Offline cbwx34

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Re: First results with SJ-250: moderate burr
« Reply #6 on: July 06, 2018, 11:40:40 pm »
are you using the SJ-250 towards the blade or away from the blade? turning towards the blade will reduce the amount of burr.

Good point. 👍

Offline RickKrung

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Re: First results with SJ-250: moderate burr
« Reply #7 on: July 07, 2018, 05:40:25 pm »
I use the SJ wheel from the vertical position (into the the edge) followed by stropping on the leather pad of a SharpPad, routinely achieving BESS scores between 90-130.  I'm sure other stropping methods would achieve similar results.  No use of the leather honing wheel. 

About a month ago, I bought a paper wheel and a 3500 rpm buffer/wire wheel only to learn the paper wheel maybe should be used at 1750 rpm.  I have a 1750 rpm grinder that I haven't set up yet, so maybe could use that for the paper wheel.  It is July, however, and I anxiously await delivery of some diamond wheels, so that distraction likely will put off working out the paper wheel. 

Rick
Quality is like buying oats.  If you want nice clean, fresh oats, you must pay a fair price. However, if you can be satisfied with oats that have already been through the horse, that comes at a lower price.

Offline Ken S

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Re: First results with SJ-250: moderate burr
« Reply #8 on: July 07, 2018, 07:10:22 pm »
Rick,

"paper wheels" are actually a pair of wheels. The first is loaded with carborundum particles in a wax base. The wax requires the 3500 RPM to melt. The second wheel, loaded with honing compound, does not require the higher speed.

I have never actually owned paper wheels. (They are on my to do list, however, I have never gotten to that point on my list.)

I feel we are in a state of flux. The new diamond wheels are certainly game changers, however, I believe they are just the start. We live in an exciting era for Tormek!

Ken

Offline Grizz

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Re: First results with SJ-250: moderate burr
« Reply #9 on: July 07, 2018, 08:55:35 pm »
when I ordered the paper wheel to hone after the SJ stone, I got just the slotted paper wheel 8"x1".
this compliments the SJ just fine and no burr that I've ever seen.
 The diamond wheels delivery date  just got pushed back until August now, so just a little longer wait for them.

Offline RickKrung

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Re: First results with SJ-250: moderate burr
« Reply #10 on: July 07, 2018, 11:30:28 pm »
when I ordered the paper wheel to hone after the SJ stone, I got just the slotted paper wheel 8"x1".
this compliments the SJ just fine and no burr that I've ever seen.

I look forward to finding out how this works, once I get my paper wheel set up.

The diamond wheels delivery date  just got pushed back until August now, so just a little longer wait for them.

Arrrrgh!  Oh well, clears the mental decks so I can focus on other stuff. 

Rick
Quality is like buying oats.  If you want nice clean, fresh oats, you must pay a fair price. However, if you can be satisfied with oats that have already been through the horse, that comes at a lower price.