From: Bruce C. Beattie (bruce@EECS.Berkeley.EDU)
Date: Fri Aug 19 2005 - 18:59:03 PDT
I think I figured out what made this assembly come loose. The spiders
are attached with some
short bolts whose heads are on the face of the flange that bolts up to
the mating flange. The
use an internal star washer to keep the bolt from loosening. This star
washer is polarized
in that the burs stick out one way only. The person who assembled this unit
had the burs facing the flange instead of the bolt head. The metal used
in the flange is
softer than that of the GR8 bolt head and as a result the washer just
sunk into the metal of
the flange thereby loosening the connection.
Moral of this story: Burs should always face the bolt head, not the
assembly.
Hope this keeps someone out of trouble.
Bruce MVPA 23824
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