Stone Ball for comments

fernando · 31st July 2022, 09:40 AM

Mill (grinding) balls are iron. That's what i feared when i gathered by iron ammo.

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kronckew · 31st July 2022, 01:31 PM

Old style windmill water pumps used in remote prairie or outback locations for livestock, etc, generally had a speed governor that uses heavy iron balls as part of the mechanism. Some get sold as cannon balls.

fernando · 31st July 2022, 04:50 PM

Those could be easily excluded by the initiated, as they leave visible marks of their suspension rings.

Interested Party · 22nd October 2022, 05:43 PM

Quote:

Originally Posted by fernando

Mill (grinding) balls are iron. That's what i feared when i gathered by iron ammo.

I recently found these in a friend's yard. I remembered reading a thread about items that could be mis marketed as cannon balls. I live in an area that had many precious metal ore mines at one time. I thought a picture might be appreciated. The measurements are in inches, my apologies to my metric friends. Also attached is a short reference from everyone's favorite source

https://en.wikipedia.org/wiki/Ball_mill

31st July 2022, 09:40 AM	#1
fernando (deceased) Join Date: Dec 2004 Location: Portugal Posts: 9,694	Mill (grinding) balls are iron. That's what i feared when i gathered by iron ammo. . Attached Images

31st July 2022, 01:31 PM	#2
kronckew Member Join Date: Mar 2006 Location: Room 101, Glos. UK Posts: 4,259	Old style windmill water pumps used in remote prairie or outback locations for livestock, etc, generally had a speed governor that uses heavy iron balls as part of the mechanism. Some get sold as cannon balls.

31st July 2022, 04:50 PM	#3
fernando (deceased) Join Date: Dec 2004 Location: Portugal Posts: 9,694	Those could be easily excluded by the initiated, as they leave visible marks of their suspension rings.