Grinder Wheel - Size, Grit, Function - Which to Pick? - Heat is Evil

Shawn, thank you very much for including me in your video , very kind words and means a lot coming from you.
You have been one of my many recomendations to viewers as well local students that wanna learn woodturning.
So much in depth knowledge in this video ,great job.
Just to add, I use cbn 180 grit, which in my opinion is plenty fine for turning and planing to add 80grit cbn . Before a year ago, I only used 60 and 80 white wheel as these were available in Croatia and they work like you said just fine.

P.s you said name correct,last name very very very close 😄.
Have a great day.

Shawn your videos are always very useful and presented in an approachable and undersandable way. Thanks very much indeed.

Great video. Thank you

Great comments regarding grit, I stopped at 320 & often thought a 600 would give a keener edge, I bow to your wisdom. I also congratulate your accurate comments on Tomoslav, I stumbled across his Channel some time ago & find his tuition very practical and easy to put into practice.

This is a very timely video for me as I've been looking to replace my friable wheels with CBN. It sounds like 180 grit with the radiused edges is the sweet spot for touching up my turning tools, and maybe keep a high-grit friable for shaping which I don't think is going to be as common. On the 600 I see that you have the type with the CBN on the side of the wheel. How often does that flat part get used in normal turning tool sharpening?

whoa a little color on the edge does not mean you take a half inch off the chisel. Just take away the color plus a millimeter or so.

I just use platforms to sharpen.

Shawn thanks for this lesson. It confirmed that my choices for grinding wheels were correct. Thanks for sharing.
Also, your bonus link to Tomislav Tomasic was on point. He is Raffan trained and is an excellent wood turner and teacher. I've been watching his videos for quite a while now. We are fortunate to have folks like you and him to learn from. Thanks again. 👍🏾

Brilliant video - I've been missing this format :) The info on the heat generated from the 600 grit stone was so important - thank you for that! In the reference links, you included the Wolverine (again - thank you), but no links to reputable wheels. Do you recommend one manufacturer over another, or are all wheels equal (aside from grit)?

Wow! This is a very good video. I learned a lot. Thank you.

I find it hard to believe that there is appreciable heat exchange between the tool and the wheel. It's more likely that harder diamonds just cut with less friction.

I think the coarse wheel stays cooler partially because the ground off material takes more heat with it.

Tomislav is a very good instructor! For me, he's constantly doing "Why Didn't I Think of That?" turning techniques. Shawn, good video!

How is Jack doing

Thanks for the info about the CBN wheels I was in a bit of a dilemma,now I can take an educated decision I’m going for 180 and an 80 grit..

Thanks for the rundown. I sharpened gouges on my newly acquired low speed grinder for the first time recently and noticed how hot the friable wheels made my tools. It made me hesitate to use them on my turning right away and elected to let them cool. I am sensing a CBN in my near future! Great recommendation with Tomislav! He has a gift for teaching, like you!

I bet the 600 grit wheel would be better at slower RPM.

Enjoyed the video. Thanks for sharing

More good info, Shawn. After watching this, I'm glad I chose 180 and 320 for my CBN wheels.
I recently found Tomislav as well and I agree with you.

Thank you,Shawn. You always have good information to share. Question for you: Are you familiar enough with the Sorby Pro-edge sharpening system to have an opinion on it? The owner of the local woodworking store really pushes them.

Thank you, Shawn. 😊 Tomislav is very good. 👍

Nice video even tho I do things totally different. More than one way to skin a cat???
CBN is not a diamond and in many cases better for harden steel.
CBN stands for cubic boron nitride, a superabrasive that offers almost the hardness of diamond, cool cutting and the ability to work with ferrous materials, unlike diamond.
Diamond is composed of pure carbon and is produced under high heat and pressure. When Diamond is used to grind hardened steel it causes a chemical reaction and essentially begins to form graphite and lose it strength.
What makes CBN better for working with hardened steels? CBN is not composed of carbon atoms, instead it is formed with boron and nitride under pressure and heat. Grinding hardened steels produces high temperatures, CBN has a great thermal conductivity, keeping it cool under extreme heat.

Diamond is widely known as being the hardest material for grinding and sharpening.
It is cost effective when working with carbide, glass, ceramics, ferrite and non-ferrous metals.
The biggest advantage of using a diamond wheel is its hardness and also its high thermal conductivity. The high thermal conductivity, allows the diamond crystals to transfer heat away from the cutting edge of the wheel and, when necessary, dissipate the thermal energy through the bond and grinding wheel body.

yay more content. im on 180 cbn woodwonders 4 in 1 + love it. i also us a wire wheel on the other side of the grinder to clean the tools of pitch. so the cbn stays cleaner longer. also use the wonder stick for pre cleaning

Good one Shawn. your information always helps. Good to see you again,

Awesome video thanks for all your knowledge sharing over the years. It has all really helped me in my learning to turn. Keep up the awesome work 👽

Yep, Tom is areal master turner. Check him out.

wortheffort, cool video my guy