My biggest studs were 1-1/2". In the comments section of my video the first link shows engineered torque values. I selected lubricated and 316 SS. Looks like 622ft-lbs... And that is the lowest of all the SS configurations. I presume that I needed it and the 615 that I used was still conservative.
Josh On Thu, Feb 21, 2019, 9:02 PM Charlie Nelson via CnC-List < cnc-list@cnc-list.com wrote: > Now that (600 Ft-lbs) is a LOT of torque compared to 250. > Did you really need that much or were your bolts of a size that 600 was > recommended? > > 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: > > I only had to get about 200 ft-lbs on my 3:1 torque multiplier for a total > of 600 ft-lbs. It was a pretty good struggle to get there. > > Josh > > On Thu, Feb 21, 2019, 8:55 PM Josh Muckley <muckl...@gmail.com wrote: > > Charlie, > > You're very welcome. I got my torque wrench from home depot about 15 > years ago. It's the one you see in the video. > > > https://m.lowes.com/pd/Kobalt-1-2-in-Drive-Click-Torque-Wrench-50-ft-lb-to-250-ft-lb/1000259431 > > > https://www.homedepot.com/p/Husky-50-250-ft-lbs-1-2-in-Drive-Torque-Wrench-H2DTWA/205914009 > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > > > > > > > On Thu, Feb 21, 2019, 5:47 PM Charlie Nelson via CnC-List < > cnc-list@cnc-list.com> wrote: > > 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 > > _______________________________________________ > > 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 > >
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