Posts: 92
Threads: 0
Joined: Jan 2010
http://youtu.be/zfpo3MasyKQAfter watching this guy sharpen on stones so far out of flat it makes you wonder if machinists grade flat is a North American affection.
Posts: 3,057
Threads: 0
Joined: Dec 2006
Location: Concord, NC
Awesome. Thank you.
"Life is too short for bad tools.".-- Pedder 7/22/11
Posts: 20,950
Threads: 0
Joined: May 2005
Tools are curved, means only one point on the surface of even a flat stone can be tangent. Rest means nothing.
Now, lapping a planar surface, flat comes in handy.
Better to follow the leader than the pack. Less to step in.
Posts: 312
Threads: 0
Joined: Jan 2011
That's bonkers! Thanks for the share!
--------------------
"Aus so krummem Holze, als woraus der Mensch gemacht ist, kann nichts ganz Gerades gezimmert werden."
Posts: 2,605
Threads: 0
Joined: Jan 2004
Around 1500 Leonardo Da Vinci designed a continuous rotation lathe. Seems like all earlier lathes were reciprocating like this one, some with one pedal and a spring pole and others with a bow wrapped spindle.
https://www.google.com/search?q=picture+...sEefT6a0B8-M%3A
Cheers ...
Lyn Disbrow: Born in America ... a long long time ago
Posts: 936
Threads: 0
Joined: Apr 2007
Very interesting video. Thanks for finding this one and sharing.
Posts: 13,842
Threads: 0
Joined: Jun 2001
Interesting video, thanks for sharing !
Steve