This tends to be a common check that is done on marine diesels and large
stationary engines as a preventative maintenance exercise. It shows how well
the main bearings are aligned.The bearings in large engines can be aligned
individually unlike smaller engines which a line bored and stay aligned for
the life of the engine.


"william_b_noble" wrote in message
news:1126419746.653055334991af75cf3505a8970c7796@t eranews...
this is a pretty interesting specialty gauge - could be of interest to
some
of the NG - it's very cool I must say

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=7545711932

--
Bill



also check out http://www.wbnoble.com