Grinding a sintered bronze bushing - GIF

Grinding a sintered bronze bushing.

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Previously:

https://www.homemadetools.net/forum/...579#post197383
https://www.homemadetools.net/forum/...869#post175391
https://www.homemadetools.net/forum/...565#post166765
https://www.homemadetools.net/forum/...836#post179135
https://www.homemadetools.net/forum/...839#post175263

Ok, so what are we seeing?
Ralph

Very good question

guessing it's the oil boiling off through the pores of the bush

Quote:

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Originally Posted by Ralphxyz

Ok, so what are we seeing?
Ralph

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It looks like grease weeping out of the porous metal after it was heated by grinding

Quote:

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Originally Posted by Ralphxyz

Ok, so what are we seeing?
Ralph

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Bronze-worms...deadly poisonous. They burrow right through your skin & into the bloodstream. Due to their small size & molecular similarity to haemoglobin, they cross the blood-brain barrier and cause addiction to metal-working, especially with copper-tin alloys, thus ensuring their continued reproduction.

Quote:

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Originally Posted by desbromilow

guessing it's the oil boiling off through the pores of the bush

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By George, I think you have it! To steal a phrase. ;)