[Public-list] Masthead Sheave

[Cole, Andrew L]

Mike,

Good point.  I pulled the measurements of a blueprint on the website
that shows a 1/2" hole.  There is another set of measurements in the
maintenance section that shows photos of an aluminum sheave with a
5/8ths hole, which is confirmed by your measurements.

Unless there is outcry, I will change the spec to 5/8 holes (this seems
to be the more-correct spec).  If there are any 1/2 inch bolts out
there, they could be retrofitted by just drilling out the hole 1/8
larger and replacing the bolt.

Andrew


>>Andrew,

>>I have 2 sheaves at home. 1. really old, phenolic, from and older A30,
and 
>>2. an aluminum sheave from hull #567. Both are original A30 sheaves.
Both 
>>are in reasonable condition. Both have 5/8" center holes without
showing any 
>>elongation from wear. Your specs are for .5" center holes. Given this,
I 
>>believe the center axel is 5/8". I still want 2 of the new ones, but
how did 
>>you come up with the .5" center hole? Can you double check that? All
of the 
>>other dimensions are good.



>>Mike Lehman
>>~~~_/)_/)~~_/)~~~  

Cole, Andrew L
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