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<http://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<mailto: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
_______________________________________________ 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
