The specification sheet from the C&C site says a 1" bolt, 1 1/2" bolt is 350
foot pounds
John on EnterpriseC&C 33 MK II
On Tuesday, January 2, 2018, 6:30:46 PM EST, Ron Ricci via CnC-List
<cnc-list@cnc-list.com> wrote:
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Last season, I ended up having my boatyard doing this. I have no idea of the
last time this was done but it was before 2010. The boatyard used Ken Heaton’s
torque values. In order to loosen some of the nuts, an impact tool was
required. - Ron
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Josh Muckley
via CnC-List
Sent: Tuesday, January 2, 2018 3:18 PM
To: C&C List
Cc: Josh Muckley
Subject: Stus-List Keel bolt torque
Ok Guys,
Since I have the mast out, this provides the rare opportunity to access ALL of
the keel bolts. I've measured each of the bolt and nut diameters and checked
the archives for torque specs. I intend to buy a toque multiplier and the
appropriate sized sockets. I think I can do it for less than the yard is going
to charge and I'll come out of it with some tools. I'll also be able to tell
myself that it was done correctly.
That being said it sounds like the best practices are are follows:
- be on the hard
- loosen the bolts one at a time, clean, and lubricate with tef-gel
- reinstall and torque at progressively higher levels.
I was unable to find the torque spec for my 1.5" bolt in the website but Ken
Heaton cited 600lbs in one of his past responses.
Keel bolts (fwd to aft):
Nut stud torque
1 - 1 1/2 (38mm) 1 (25mm) 350
2 - 2 3/16 (56mm) 1 1/2 (38mm) 600?
3 - 2 3/16 (56mm) 1 1/2 (38mm) 600?
4 - 2 3/16 (56mm) 1 1/2 (38mm) 600?
5 - 1 7/8 (47.5mm)1 1/4 (32mm) 450
6 - 2 3/16 (56mm) 1 1/2 (38mm) 600?
7 - 1 1/2 (38mm) 1 (25mm) 350
8 - 3/4 (19.5mm) 1/2 (13mm) 80
Anything I'm missing?
Thanks,
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
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