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Forum topic by DDJ posted 08-05-2018 07:01 PM 1274 views 0 times favorited 10 replies Add to Favorites Watch
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DDJ

34 posts in 559 days


08-05-2018 07:01 PM

If I was to buy just one cbn wheel what grit would you guys suggest. I’ve always been somewhat anal about the sharpness of my plane irons and chisels and I want some good results from the cbn. Right now I’m leaning towards the 180 grit. And what else is there to consider? This is the wheel I’m considering on Amazon but I’m open to all suggestions. Thanks. Dave

https://www.amazon.com/1-5-CBN-Grinding-Wheel-Bore/dp/B01GG5GIEY/ref=sr_1_7?ie=UTF8&qid=1533494655&sr=8-7&keywords=cbn+grinding+wheel


10 replies so far

View Wildwood's profile

Wildwood

2672 posts in 2553 days


#1 posted 08-05-2018 08:52 PM

You do not need a CBN wheel to sharpen high carbon steel like plane irons & wood chisels! Amazon tells you as much but could do better explaining.

If talking about HSS or better steel woodturning tools CBN 180 grit wheel okay.

-- Bill

View Bmezz's profile

Bmezz

50 posts in 1802 days


#2 posted 08-06-2018 10:58 AM

CBN wheels are for high speed steel only. Carbon steel will clog the wheel and eventually ruin it.

-- Member Valley Woodturners Ottawa. Member AAW

View DDJ's profile

DDJ

34 posts in 559 days


#3 posted 08-06-2018 04:39 PM



You do not need a CBN wheel to sharpen high carbon steel like plane irons & wood chisels! Amazon tells you as much but could do better explaining. If talking about HSS or better steel woodturning tools CBN 180 grit wheel okay.

- Wildwood

This will only be for my lathe tools. I have my sharpening system for my other tools

View Woodknack's profile

Woodknack

12842 posts in 2799 days


#4 posted 08-06-2018 06:16 PM



CBN wheels are for high speed steel only. Carbon steel will clog the wheel and eventually ruin it.

- Bmezz

Carbon steel is hardenable, it’s not gummy like copper based metals. Tool steel and spring steel are variants of high carbon steel, the carbon is what makes it hard. Files, cutting tools, knives, chisels, hammers, and lots of other things are made from carbon steel; anything that needs to be hard and tough.
So it’s not just my word.
http://d-waytools.com/cbn-grinding-wheels
http://www.robohippy.net/featured-article/

-- Rick M, http://thewoodknack.blogspot.com/

View dca's profile

dca

28 posts in 444 days


#5 posted 08-07-2018 05:02 AM

180 is arguably more versatile. You can use your lathe tools straight from the wheel and it’s also aggressive enough to hollow grind chisels and irons.

I asked Joel Moskowitz of Tools for Working Wood (he carries CBN wheels) this very question and he advocated for coarser wheels (60 and 80 grit) as they cut cooler and faster. This was in the context of honing afterwards though – not using the tool straight from the wheel.

I ended up with a 180 grit and am very pleased with it. These wheels cut so fast I’m not sure I want them to cut much faster.

When you get it give it a try with your irons and chisels, I think you’ll be pleased.

View Bmezz's profile

Bmezz

50 posts in 1802 days


#6 posted 08-07-2018 11:27 AM


CBN wheels are for high speed steel only. Carbon steel will clog the wheel and eventually ruin it.

- Bmezz

Was there a point to your post?

Carbon steel is hardenable, it s not gummy like copper based metals. Tool steel and spring steel are variants of high carbon steel, the carbon is what makes it hard. Files, cutting tools, knives, chisels, hammers, and lots of other things are made from carbon steel; anything that needs to be hard and tough.
So it s not just my word.
http://d-waytools.com/cbn-grinding-wheels
http://www.robohippy.net/featured-article/

- Woodknack


-- Member Valley Woodturners Ottawa. Member AAW

View Woodknack's profile

Woodknack

12842 posts in 2799 days


#7 posted 08-07-2018 04:38 PM



Was there a point to your post?
- Bmezz

Yes, carbon steel does not clog the wheel. Sorry, I should have been more explicit.

-- Rick M, http://thewoodknack.blogspot.com/

View bigJohninvegas's profile

bigJohninvegas

632 posts in 1881 days


#8 posted 08-13-2018 03:32 AM

180 grit is fine for maintaining turning tools.
I keep a 180 CBN for every day sharpening, and a 80 stone wheel set up to fix or make angle changes.
I was told back when I was a new turner that finer than 180 would give you a fragile edge on turning tools.
Although have read where some are using higher grit wheels, I do find 180 to be just fine.
https://woodturnerswonders.com/collections/cbn-wheels
I bought mine from this site a few years ago. At the time I chose the 8” radius edge. The wheel is three years old and as good as the day I got it. However that radius edge was a mistake.
Today they offer a mega square wheel that is 1.5” wide. I am thinking of upgrading to it.

-- John

View DDJ's profile

DDJ

34 posts in 559 days


#9 posted 08-13-2018 07:01 PM

Thanks John. The wheel I’m looking at is 1.5” wide but since my original post I had to spend a few bucks on both of my Jeeps which is putting a dent in my tool and new lathe budget. Just a temporary situation. Dave

View Kelly's profile

Kelly

2335 posts in 3363 days


#10 posted 10-16-2018 04:56 PM

I have a couple CBN’s on my four wheel grinder. If I could only have one, it would be the 180. It would be as wide as I could get it and I’d go with the larger (8”) diameter.

I slow my grinder down to about 500 RPM for touch up. That speed even does a good job for re-profiling, but, if I want more material off and don’t mind a more heat, I turn it up to 1,000-1,500.

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