https://youtu.be/tRR96ILGORU
On Thu, Feb 21, 2019, 9:28 PM Jeffrey A. Laman via CnC-List < cnc-list@cnc-list.com wrote: > Torque is not affected in this case by deformation of the extension or > other hardware at all. Zero. Torque is force x moment arm length. > > Jeff Laman > 1981 C&C34 "Harmony" > Ludington, Mi > > ------------------------------ > *From:* David Miles <mi...@intergate.ca> > *Sent:* Thursday, February 21, 2019 7:33 PM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Bolts, nuts and torque > > > I could be wrong, but don’t you also have to allow for the torque/flex of > the extension, therefore if you have a listed 250# value to be measured, > you add the 15# rating of the extension, making your goal readout at a new > number of 265#s? I am only guessing at the extension value. Need to check > ours as well, but this thought comes to mind from many years ago. Would > like to know if it has merit or not. > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *David > via CnC-List > *Sent:* February-21-19 3:35 PM > *To:* cnc-list@cnc-list.com > *Cc:* David > *Subject:* Re: Stus-List Bolts, nuts and torque > > > > Renting a large torque wrench is a easy solution... > > From my Android.... > > > ------------------------------ > > *From:* CnC-List <cnc-list-boun...@cnc-list.com> on behalf of Charlie > Nelson via CnC-List <cnc-list@cnc-list.com> > *Sent:* Thursday, February 21, 2019 5:46:47 PM > *To:* cnc-list@cnc-list.com > *Cc:* cenel...@aol.com > *Subject:* Re: Stus-List Bolts, nuts and torque > > > > Thanks for chiming in Josh. I like not buying a multiplier! > > > > Will have a look for a 250 ft-lb wrench etc. and review your video. > > > > Good catch on the the stud size—my msmt was with a ruler across the stud > but was likely across the inside of the thread groove—plus 7/8” seems a > little strange for such a large stud. The flats on the nut were much easier > to measure. > > > > I like your ft-lb numbers since they are consistent with what I found for > SS and reachable without a multiplier. > > > > Thanks again, > > > > Charlie > > Sent from AOL Mobile Mail > Get the new AOL app: mail.mobile.aol.com > > > > On Thursday, February 21, 2019, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > > > Look in the description section of the video for useful links. > > > > https://youtu.be/n6B0IPKQERc > > > > If the flats of the nut are at 1-1/2 inch then the studs are 1 inch and > you're looking at roughly 230 to 250 ft-lbs lubricated torque value. A > large torque wrench from Home Depot or Lowes should max out at 250. It > will almost certainly be 1/2 inch drive. Operating any torque wrench at > its high limit is always difficult... But doable. I would probably try to > save myself the money on a torque multiplier and just get the biggest > torque wrench and 1/2" drive extensions and a 1/2 inch drive, deep, 6 > point, 1-1/2" socket. > > > > Josh Muckley > > S/V Sea Hawk > > 1989 C&C 37+ > > Solomons, MD > > > > > > > > On Thu, Feb 21, 2019, 1:41 PM Charlie Nelson via CnC-List < > cnc-list@cnc-list.com wrote: > > > > It appears per list comments that it is OK to tighten my keel/centerboard > 'trunk' without putting her on the hard. Since I can reach most of the nuts > by removing the cabin sole, I figure its worth a try. I cannot reach the > bolts under the mast this way but I can probably get to most of the others. > My keel/cb trunk is pretty wide so there are 2 rows of bolts/nuts holding > it to the hull. > > > > My guess is that I have 8-12 pairs of bolts and those that I can see are > 7/8" diameter with nuts that are 1 1/2" across and appear to be stainless > steel. BTW, my keel/cb trunk and board weigh-in at about 5600 lbs per the > original specs. > > > > A quick internet search on torque wrenches, multipliers and torque values > with my bilge depth in mind indicates that I will need a 1 1/2" socket with > an extension of ~ 12 inches and maybe a torque multiplier, depending on the > torque required. > > > > List sources suggest torques of over 200 ft-lbs are required and most > common torque wrenches top out at 150 ft-lbs thus the multiplier. My quick > look at recommended torques vs. SS (18-8) bolt sizes indicates 193-195 > ft-lbs is recommended for my bolts which is consistent with values I have > seen on the list and the C&C photo album, although a little on the low end. > > > > OTOH, I might be able to use a bigger/longer torque wrench without the > multiplier. > > > > Either way, I am not certain of what drive size to either rent/borrow or > buy--and the cost is substantial if you go from the 'standard' 1/2" drive > to 3/4" or higher. > > > > Questions for the list: > > > > 1. Are my torque values ~ 200 ft-lbs within the ballpark? I seem to > remember some list recommendations at ~ 350 ft-lbs! > > > > 2. Also, what is a reasonable drive size to use? > > > > 3. Should I just go with a larger torque wrench (which will reach the > ft-lbs required without the multiplier)? > > > > 4. Any likely issues with not tightening the bolts under the mast until my > haul-out this summer? > > > > TIA > > > > Charlie Nelson > > Water Phantom > > 1995 C&C 36 XL/kcb > > > > > > > > > > > > > > > > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > > > ------------------------------ > [image: Avast logo] <https://www.avast.com/antivirus> > > This email has been checked for viruses by Avast antivirus software. > www.avast.com <https://www.avast.com/antivirus> > > <#m_-721071544447378384_x_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
