[Public-list] Main Halyard Sheave Group Purchase

[George Dinwiddie]

Mike Lehman wrote:
> 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
> ~~~_/)_/)~~_/)~~~
> 
> ----Original Message Follows----
> From: "Cole, Andrew L" <andrew.cole at llff.com>
> Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
> To: <public-list at alberg30.org>
> Subject: [Public-list] Main Halyard Sheave Group Purchase
> Date: Mon, 31 Jul 2006 11:48:53 -0400
> 
> I am getting ready to place an order for delrin main halyard sheaves.
> The sheave dimensions are taken from the website, and hopefully should
> be an exact match for the original piece, 6.75" in diameter, .5" in
> width, with a bronze bushing and a .5" axle pin hole.  The sheaves are
> machined to take either wire or rope.  The manufacturer's website is
> www.zephyrwerks.com.

Sorry for the delayed response; I've been out of town.

The diagram at http://alberg30.org/maintenance/disorganized/sheave/ is 
speculative, if you read the description that accompanies it.

The measurements at 
http://alberg30.org/maintenance/SparsSailsRigging/MainSheave/ are 
actual.  Note that it's bushed to 5/8".  Jay subsequently said that the 
6.75" diameter was too tight, once the shackle was spliced into the 
halyard.  I believe he reduced the diameter slightly from this so the 
splice wouldn't jam.

  - George


-- 
  ----------------------------------------------------------------------
   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.
                'The Middle' by Ogden Nash
  ----------------------------------------------------------------------




 1154551362.0