With 20" torque wrench you will need to exert 210-230 lb of force (at
the 20 inch mark). More likely 230-260 lb force at about 18" on the
torque wrench. A torque multiplier will help as will a longer torque
wrench. We used to have to torque the fuse bolts on Laser Guided Bombs
to 650 ft-lb. We used a 6:1 toque multiplier and about a 4 foot torque
wrench. It was still tough, especially on the unlucky one that had to
hold the torque multiplier.
Also remember that the 350 ft-lb is based on clean, dry threads. If you
lubricate the threads, lower that number by 10%.
Neil Schiller
1970 Redwing 35, Hull #7
(C&C 35, Mark I)
"Corsair"
about 50 days to splash
On 3/22/2016 9:27 AM, Ryan Doyle via CnC-List wrote:
Tried to tighten my keel bolts to spec today. Can't get any of them to
move... at all. Can't tighten, can't loosen. I wouldn't call myself
a super strong guy, but I'm 6', 175lbs. and I've certainly loosened a
few bolts in my lifetime. These won't budge. Should I just leave
them alone? Or should I buy a longer torque wrench or some sort of
extension to get some more leverage? Currently using a wrench about
20" long. It's also hard to brace yourself for good leverage on the
boat. The specs say 350 ft lbs for my boat. That sounds like maybe
more force than I can exert?
Any thoughts are appreciated.
Ryan
1976 C&C 30
Nobody's Bargain
New York
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_______________________________________________
This list is supported by the generous donations of our members. If you like
what we do, please help us pay for our costs by donating. All Contributions are
greatly appreciated!
