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0t--Buderus 4 jaw chuck

JHOLLAND1

Titanium
Joined
Oct 8, 2005
Location
western washington state
Buderus 4 jaw chuck used to attach pitchometer to large naval vessel propeller
20 inch chuck--6 in thru hole

concentric scroll configuration mated to worm and gear for jaw motion--I have not previously
encountered this construct in what is usually a turning machine workholding implement
 

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buderus-2

one application of propeller pitchometer is blade adjustment
photos from Brooklyn NY firm claiming to be oldest in region providing this service
 

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