Best/Longest Lasting Abrasives

HSC /// said:
I think I found you on Instagram
You are doing the thick 80crv2 outdoor knives?
Have you considered using thinner blade stock?

Harbeer
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Yeah, that's me. I have considered that but when it came time to order steel I couldn't find any 1/8" in stock at Jantz, AKS, or Pop's.
 
Harley Boatman said:
The blade is 80CrV2 and 6.75" long and almost 2" tall at the fattest part of the belly

I'm not familiar with what a belt dresser is and how it works, does it bring out new abrasive?

Also I'd love to be able to go slower but I made the mistake of "I can afford this for now and buy a better grinder later" so I only have one speed.. really fast 😅🤣
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Which grinder you have ? And how fast is that ..........really fast ?
 
It is a bar of abrasive material that fractures the glazed grits and exposes new sharp edges. The easiest ones are a sintered diamond bar.
You press it firmly against the running belt and let it work on the abrasive. They are used the same way to dress a grinding wheel.
www.ebay.com

Diamond Grinding Disc Wheel Stone Dresser Correct Tool Dressing Bench Grinder US | eBay

Type: Stone Dresser. Style: Dresser tool. 1 x Dresser tool. Dresses across the width of grinding wheels to give a flatter surface. Sub-Type: Grinding Disc Wheel. Heavy duty diamond coated head with knurled handle for secure grip.
www.ebay.com
 

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HSC /// said:
Run fast for high wear resistant steels that’s hardened ?

Not in my experience.

when I worked in a investment casting foundry for 12 years, we ground off the casting gates with abrasive belts. Lots of them. About $100k a year worth of a tablets. We used Norton. We tested all three major brands. Norton , 3m and Vsm. We had their application engineers on site.
All applications are different and no one ever said there was any specific range or even guidelines to operate within

Yes Vsm has study specs of belts running at 25-30 meters per sec or roughly 4500 sfpm and that will be on 35 rc hardness steel
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lI'm certainly willing to stand corrected, but I've lost count of how many threads on here have said that ceramics should be ran at 5-6000 SFPM in order to fracture properly. I've always felt like I got a little better cutting when running faster, but maybe I'm wrong.
25 to 30m/s is about 4900 to 5900 feet per minute, fwiw. What impact the HRC has on that, I can't really say definitively.
 
Stacy E. Apelt - Bladesmith said:
It is a bar of abrasive material that fractures the glazed grits and exposes new sharp edges. The easiest ones are a sintered diamond bar.
You press it firmly against the running belt and let it work on the abrasive. They are used the same way to dress a grinding wheel.
www.ebay.com

Diamond Grinding Disc Wheel Stone Dresser Correct Tool Dressing Bench Grinder US | eBay

Type: Stone Dresser. Style: Dresser tool. 1 x Dresser tool. Dresses across the width of grinding wheels to give a flatter surface. Sub-Type: Grinding Disc Wheel. Heavy duty diamond coated head with knurled handle for secure grip.
www.ebay.com
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I have been wondering what this tool was called so I could get one. I remember a spinning version from back in shop class. How long do they last?
 
HSC /// said:
Run fast for high wear resistant steels that’s hardened ?

Not in my experience.

when I worked in a investment casting foundry for 12 years, we ground off the casting gates with abrasive belts. Lots of them. About $100k a year worth of a tablets. We used Norton. We tested all three major brands. Norton , 3m and Vsm. We had their application engineers on site.
All applications are different and no one ever said there was any specific range or even guidelines to operate within

Yes Vsm has study specs of belts running at 25-30 meters per sec or roughly 4500 sfpm and that will be on 35 rc hardness steel
Click to expand...


Anecdotally, my good lifelong friend worked at a fabrication shop in Florida that made boat accessories out of stainless steel. As the fab shop manager, he tried for a couple of years to convince the owners that they needed to quit using cheap AO belts and use the good ceramic belts, but they always balked at the difference in price per belt. Eventually he convinced them to try it, and the shop did a trial using Norton Blaze. The result was way better and faster work, and it ended up saving (or making) the business a lot of money! He had some choice words about how clueless the bean counters were about the efficiency of good tools.



Natlek said:
Norton abrasive.............

RECOMMENDED GRINDING BELT SPEED

Titanium & similar alloys 8-15m/s Carbon steel 30-40m/s
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I recommend even slower than that. 😅
 
Justin W said:
I have been wondering what this tool was called so I could get one. I remember a spinning version from back in shop class. How long do they last?
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The wheel type was a stone wheel dresser. The diamond bar type will dress a wheel as well as a belt. They last a pretty long time. At $10 each, if it lasted four belts, it would have paid for itself twice. I think I have used up two or three over the years. I first bough a good one from an industrial supplier for about $50. It was a solid bar with a solid handle. Then I tried the cheap lightweight import one and it is just about as good for what we need.
 
What website do you guys find your belts on? It looks like VSM is the most recommended so far so I'd like to try those first
 
Harley Boatman said:
When I push hard my thumbs melt! 🤣 🤣 At least once it stops cutting as well, it really heats up quick
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Try using a push stick, dip in water every pass to cool down.

If I feel that I glazed a belt I will take an old file and push it hard in the belt. If that doesn't get the sparks flying it's dead.

I also tried VSM and Bora7 and both will last long in heavy grits, but it is important to use pressure and speed.
 
Getting the most from coarse grit ceramic belts is achieved with high belt speeds and pressure, the belts are made for it. They are designed for far more pressure and speed than you can do grinding free hand.......... what happens most often is you glazing belts ..
 
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