Of greatest concern to me when I did this job was risk of galling. Stainless is notoriously susceptible to this ¡°cold welding¡±, a totally lay expression of what goes on but very descriptive of the outcome. ?I read enough about it to become confused and it ultimately led me to applying Tefgel to the threads when I reinstalled the nuts. I ?reduced the torque setting to 80; read about adjusting torque for lubricated threads vs dry threads. I assumed the torque spec of 90 lbs was dry since there was no specific mention of lube in the owners manual. 80 ft-lbs seems light but that¡¯s what the science says. Or even less if you apply the range of %¡¯s recommended for reduction.
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Sabre says 90 ft-lbs is adequate to do the job so we¡¯re hardly stressing our keel bolts just siting there . Heeled over crashing to windward or rolling vigorously while surfing downwind is another story. We won¡¯t talk about piling her up on the Clumps or anything of that nature.
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I find that crack particularly annoying and next time I redo the torque I will use this (see below) as the washer on a bed of epoxy putty slightly separated from the bolt to allow for a bead of sealant. Then run the torque up to some yet to be determined figure. Maybe 100 or 110 ft-lbs.? Need to consult my naval engineer buddies but I¡¯m sure that would be fine. We¡¯ll see.
This washer size could be maxed out to fit space in the bilge to really disperse the load, ¡seems like it would help.?
https://www.mcmaster.com/products/thick-washers/material~316-stainless-steel/system-of-measurement~inch/screw-size~3-4/thickness~0-122-to-0-177-1/
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Peter Metcalf
Pfmet@...
Sabre 28 #312 Serenade
Noank, CT
Peter