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09-12-2018, 06:28 PM
(This post was last modified: 09-12-2018, 06:29 PM by SHARPCO.)
This is my second belt grinder Viel S-5-M(1/3HP)
It's 4mm thick Robax ceramic glass.
I applied Jende 4 micron & 0.5 micron PDP emulsion to linen belts, but it couldn't remove the burr.(Left is 0.5 micron, Right is 4 micron)
So I tried to 4 micron PDP to Surgi-sharp leather belt, but the result was not different.(Right belt)
Left belt is Surgi-sharp applied with Tormek PA-70. It killed the burr and honed the edge very well. I can get 50~70 BESS with my kitchen knife. But I think 2700 SFM is too fast for using it.
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(09-12-2018, 09:09 PM)grepper Wrote: 50-70. Very impressive Mr. Sharpco. 
One thing that has caught me up a number of times is that when using leather for deburring it's easy to burnish or smear burr material into a deceptively super sharp edge. While it can get extremely sharp, it is also very weak and rolls and crushes under minimal stress. Microscopic examination is informative in that regard.
You're right grepper. I need USB microscope.
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“Left belt is Surgi-sharp applied with Tormek PA-70. It killed the burr and honed the edge very well. I can get 50~70 BESS with my kitchen knife. But I think 2700 SFM is too fast for using it.”
I agree that 2700 SFM seems too fast. That is why I converted my Viel to variable speed, and switched to the smaller drive pulley.
If 50 to 70 BESS with your Viel, leather belt and PA70 is not sharp enough for you, you might try using some of Ken Schwarz' diamond compounds going down to .1 micron.
How many costomers are willing to pay for that level of sharpness?
Ken
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Thats a good idea Sharpco. An edge tester and a microscope is a powerful combination.
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(09-13-2018, 09:20 AM)Ken S Wrote: “Left belt is Surgi-sharp applied with Tormek PA-70. It killed the burr and honed the edge very well. I can get 50~70 BESS with my kitchen knife. But I think 2700 SFM is too fast for using it.”
I agree that 2700 SFM seems too fast. That is why I converted my Viel to variable speed, and switched to the smaller drive pulley.
If 50 to 70 BESS with your Viel, leather belt and PA70 is not sharp enough for you, you might try using some of Ken Schwarz' diamond compounds going down to .1 micron.
How many costomers are willing to pay for that level of sharpness?
Ken
Ken Schwartz diamond compound? If it means emulsion or spray, I already have JENDE 0.5 micron PDP emulsion. I used it with linen belt but I found it didn't deburr and hone as well as PA-70 did.
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I have no direct experience with compounds other than PA-70. If you are getting 50 to 70 BESS readings using PA-70, I don't think you have a problem. There is a famous quote from Prussian General Klauswitz, “The enemy of a good plan is the dream of a perfect plan”. You have a good plan.
I believe the keys to consistent success with your belt grinder will be good angle control and a very light touch.
Ken
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PDP is the most aggressive compound on the market, and at high speed it will keep creating burr, as noted by Mr. Grepper.
CBN is better at removing burr, and plain boron carbide is even better.
It's a similar story in reverse. Boron carbide leaves the slickest edge, and PDP produces the most aggressive edge.
The only way to really take control is with variable, or at least, low speed.
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(09-14-2018, 03:31 AM)Ken S Wrote: I have no direct experience with compounds other than PA-70. If you are getting 50 to 70 BESS readings using PA-70, I don't think you have a problem. There is a famous quote from Prussian General Klauswitz, “The enemy of a good plan is the dream of a perfect plan”. You have a good plan.
I believe the keys to consistent success with your belt grinder will be good angle control and a very light touch.
Ken
You're right. 50~70 BESS is good score. But it's not polished edge.(I want it) It's hard to explain but I need more.
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(09-15-2018, 08:29 PM)Mark Reich Wrote: PDP is the most aggressive compound on the market, and at high speed it will keep creating burr, as noted by Mr. Grepper.
CBN is better at removing burr, and plain boron carbide is even better.
It's a similar story in reverse. Boron carbide leaves the slickest edge, and PDP produces the most aggressive edge.
The only way to really take control is with variable, or at least, low speed.
Thank you Mark,
Before the testing Viel, I thought 2700 SFM would not bad. But now I think that speed is too fast for honing.
However, paper wheel applied with diamond paste can makes very sharp polished edge. It runs faster than 2700 SFM. Why can't I make this edge on the belt?
