Torque Amp

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Ive been using this to torque my hydrolic sylinder nuts (bolts) to 556 ft pounds or there about. I was using the wrong torque but, thanks to you guys, I built this torque amp. Stole it from Samms $556.95  thread from another member. I will give him credit when I remember who it was . Plus, I dont have the math together at the moment but , I used 100 ft/lbs at the torque meter to get approx 556 ft/lbs. I will go back to the original cylinder when Im done to correct it from 90 ft/lbs to 500+ when Im done with the last cylinder (one more). I used er70s mig wire twisted into tig wire. I coulda used er70s FCAW but I wanted Tig practice. I used 70s because doing a search here, I came up with 70s, 309 and I think uetec690? Er70s was easiest to get but had to twist 6 strands together. Not worth it, shoulda took the time/traffic to get tig rod. Oh well. Hasnt broke on me yet (2 nuts), my friends beet it to the limit last weekend and I got one more plus the re-work to do and its fugly. Hope someone can use this someday. I used 6010 (practice) to weld the two plates together and TIG (practice) for socket (CR-V) to platen. If it breaks, I will just fix it.Math/link to come.Oh , and yes, I used a fon camera because its harder to judge my fugly welds Attached Images
Reply:I forgot to mention for anyone interested in the math, 1.25ft torque tool, 4 ft xtension, 100ft/lbs at the gauge and around 556 ft/lbs(close) actual torque. Forgot the math???
Reply:Based on these links (and my own formulas) you would only have 420 ft/lbs.Wrench setting = 100Original length  = 1.25 ft (from the center of the grip)Overall length = 1.25' + 4' = 5.25 fthttp://www.norbar.com/calculators/to...alculator.aspxhttp://www.norbar.com/Calculators/To...alculator.aspxYour wrench needs to be set approx 132 ft/lbs to get the desired 556 ft/lbs.Dave J.Last edited by MinnesotaDave; 03-21-2013 at 11:33 AM.Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:Thanks MinnesotaDave for correcting me and the links. Ive been getting lazy with math lately. Yes 420 ft/lbs and Im ok with 420 ft/lbs.speeddr2000 shared this link http://www.engineersedge.com/manufac...e_wrench_1.htm that gave me the idea. Heres a the formula in case the links get lost. I think they are a different variation of your links.Y= (T  x  L) / (L + E)   where Y is actual torque, T is torque reading, L is length of torque tool, E is xtension length
Reply:Originally Posted by InsanerideY= (T  x  L) / (L + E)   where Y is actual torque, T is torque reading, L is length of torque tool, E is xtension length
Reply:Yep, you are correct Oscar.
Reply:Torque amplification depends on the rigidity of the arm.If the arm is wobbly, the torque is reduced.  You're probably in the ballpark, but you ain't truly there"Any day above ground is a good day"http://www.farmersamm.com/
Reply:Originally Posted by farmersammTorque amplification depends on the rigidity of the arm.If the arm is wobbly, the torque is reduced.  You're probably in the ballpark, but you ain't truly there
Reply:Holy crapoly................the join date on my thingy shows how far back I go.  Goes to show ya................ya can ban the best, but ya can't put 'em down
Reply:TWELVE FRIGGIN' YEARS Y'ALL BEEN DEALIN' WITH MY CRAP  I'm humbledLast edited by farmersammm; 11-02-2020 at 07:56 PM.
Reply:Mods come and go............but The Farmer rocks on
Reply:Sammm, I believe I've been banned as many times as you have.  The last time you were banned, I was banned rite after you and for the same reason sort of. From your new join date I can tell it was August of 2018 because August is when we have the best old car show in the West and your new join date is 2018.  I'm not even a farmer and barely passed FFA and nobody fails that course. I wanted to weld but I woulda had to take another year of FFA. Anyway, does anybody know of a simple method to check calibration of a torque wrench?I have an idea to use a digital torque tool to compare to an under test tool.  Kinda like hooking the two together to see if they correlate. I will try to get a pic of what I'm talking about but I haven't got the digital torque tool figured out.
Reply:Originally Posted by InsanerideSammm, I believe I've been banned as many times as you have.  The last time you were banned, I was banned rite after you and for the same reason sort of. From your new join date I can tell it was August of 2018 because August is when we have the best old car show in the West and your new join date is 2018.  I'm not even a farmer and barely passed FFA and nobody fails that course. I wanted to weld but I woulda had to take another year of FFA. Anyway, does anybody know of a simple method to check calibration of a torque wrench?I have an idea to use a digital torque tool to compare to an under test tool.  Kinda like hooking the two together to see if they correlate. I will try to get a pic of what I'm talking about but I haven't got the digital torque tool figured out.
Reply:That's exactly what I was thinking. I only have a couple so I couldn't alternate for comparison but I was thinking if the two readings matched then they must be good enuf for what little I use them for. However, if they don't match then one is wrong so I got a fifty fifty chance of getting the rite torque.