Hardinge TM gibb lock

rogee

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Mar 5, 2013
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On my TM mill with a vertical head, I find that the Y & Z movements have a lockable gibb provision, but I see no way to lock the X movement, if needed. Any in put on what I view as a problem. thanks for any comments.
 
Have to admit, I don't see any on my UM.
DSCN0186.jpg
Demonstrating my ignorance, however, what does the third one do?

DSCN0186.jpg
 
Just a guess since I don't have a UM, is it the lock for the table swivel?

Tyler
 
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