Electron Micrographs of New and Used Abrasives

This topic has 19 replies, 9 voices, and was last updated 10/23/2014 at 11:07 pm by Todd Simpson.

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02/26/2014 at 11:27 pm #17438
Anthony Yan
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I really liked this YouTube video which has a field engineer explaining many electron microscope pictures of new and used grinding wheels. I was surprised at how stringy swarf is from the abrasion process. Narrator said the high speed steel was approximately 60 HRC.

https://www.youtube.com/watch?v=SD1BJG-XcuQ
03/02/2014 at 7:08 pm #17515
cbwx34
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He has another interesting video on the burr…
03/02/2014 at 10:36 pm #17517
Mark76
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Thanks guys! This channel has a lot of interesting videos.

Molecule Polishing: my blog about sharpening with the Wicked Edge
03/02/2014 at 11:31 pm #17520
Eamon Mc Gowan
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Hey guys, what is dressing?
03/02/2014 at 11:45 pm #17521
Mark76
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Me. I was just dressing up. :dry: 😆

Molecule Polishing: my blog about sharpening with the Wicked Edge
03/03/2014 at 7:54 am #17523
Eamon Mc Gowan
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Me. I was just dressing up. :dry: 😆

Okay funny guy Haha! No in the video the gentleman refers as to how not get a burr? One of them he calls “dressing”? Come on Mark your the scientist, I bet you are the one to know. :whistle:
03/03/2014 at 2:32 pm #17525
Mark76
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:sick:

Me. I was just dressing up. :dry: 😆

Okay funny guy Haha! No in the video the gentleman refers as to how not get a burr? One of them he calls “dressing”? Come on Mark your the scientist, I bet you are the one to know. :whistle:[/quote]

Yeah, but unfortunately English is not my first language. Rumour has it there is a former English teacher (teacher of English?) in our midst…

Molecule Polishing: my blog about sharpening with the Wicked Edge
03/03/2014 at 9:56 pm #17529
Anthony Yan
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“Dressing” a grinding wheel basically means two things:
(1) Shaping the grinding wheel (usually to restore flatness, etc.).
(2) Removing a thin layer from the surface of the grinding wheel to expose fresh abrasive.

You can read about it on Wikipedia:
https://en.wikipedia.org/wiki/Grinding_dresser
03/04/2014 at 1:28 am #17532
Eamon Mc Gowan
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Thank you Anthony. Once I started to read “dressing a grinding wheel” it came to me. Lol Thanks again!
03/04/2014 at 2:06 am #17534
Anthony Yan
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lol… Not to be confused with “dressage”! :silly:
https://en.wikipedia.org/wiki/Dressage
03/04/2014 at 2:35 am #17536
Mikedoh
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😛 Hey! That’s enough horsing around! 😆 🙂
03/04/2014 at 11:22 am #17538
tcmeyer
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I check my edges with my microscope after stoning each grit. I’ve never seen a burr. Ever. Am I doing something wrong, or are they just too small for my 185X ‘scope?
03/06/2014 at 10:33 pm #17587
Anthony Yan
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Not sure. I think they are just too small to see at around 200x magnification. Have a peek at these electron microscope pictures of knife edges. Many of them show various amounts of burr.

https://secure.flickr.com/photos/nanofab/with/8674414749/
03/06/2014 at 11:19 pm #17588
wickededge
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These are fantastic Anthony!

-Clay
03/07/2014 at 3:04 am #17590
tcmeyer
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Absotootley fabulous images. I’m always amazed by the amount of trash that seems to collect along sharp edges. In the navy, we would call ’em “dingleberries.” Here, I call ’em “trash collected along sharp edges.”
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