On Tue, Mar 15, 2011 at 01:04:59PM +0000, andy pugh wrote: > If you look at the last two pictures of this boring head: > http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=260744447389
> Wohlhaupter call it a differential screw. I assume this means that it > has two different thread pitches, though it could mean that there are > LH and RH sections. The last differential screw I came across had different pitches for the two threads, so that the net motion was the difference of the two, allowing _very_ fine adjustment. I couldn't see anything but screw heads when hovering over the last two photos. (But then I'm arguably GUI dyslexic, possibly due to decades pushing characters.) Erik -- . O . O . O . . O O . . . O . . . O . O O O . O . O O . . O O O O . O . . O O O O . O O O ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
