ThaBigO Posted July 12, 2006 Report Share Posted July 12, 2006 Hey guys i was wondering when people say you need to set a bolt or screw to 30lbs torque and 120 degrees. what do they mean by degrees??Thanks,Orlando Link to comment Share on other sites More sharing options...
merlin390 Posted July 12, 2006 Report Share Posted July 12, 2006 oh boy!a degree is a unit of measure for angles. think of a circle its divided into 360 degrees. so put your breaking bar at 12o'clock (also 0 degrees) and rotate it clockwise through a 120degree arc which would put you around the 4 o'clock position.what the hell do they teach in schools now? Link to comment Share on other sites More sharing options...
ThaBigO Posted July 12, 2006 Author Report Share Posted July 12, 2006 lol i frased that question wrong haha thanks though merlin. I know what degrees are just dont know how it was used when u tighten a bolt with it. So once the wrench clicks or whatever at the set 30 lbs of torque you move it 120 degrees after that?? is that wat it means?? Also what happens when a Torque wrench gets to the set amount of torque u set it to. does it click. does it stop? My dads friend just gave me one for free and im trying to firgue out how to use it properly. Also do you think it will have to be recalibrated??Thanks again,Orlando Link to comment Share on other sites More sharing options...
maiku Posted July 12, 2006 Report Share Posted July 12, 2006 when it clicks, that means its over the toruqe limit set by the wrenchif it's a decent quality wrench it won't need calibration (or it's not worth the time) Link to comment Share on other sites More sharing options...
TheMan5952 Posted July 12, 2006 Report Share Posted July 12, 2006 When you hit the specified torque the handles clicks and may move a slight amount. At work we have our torque wrenches re calibrated once a year but we use them several times a day everyday so we get alot of use out of them. Link to comment Share on other sites More sharing options...
merlin390 Posted July 12, 2006 Report Share Posted July 12, 2006 after your torque wrench clicks, get your breaking bar out, start at the 12o'clock position and end at the 4 o'clock position Link to comment Share on other sites More sharing options...
ThaBigO Posted July 12, 2006 Author Report Share Posted July 12, 2006 oh no breaking bar!! Whats that? Link to comment Share on other sites More sharing options...
BeachRat Posted July 12, 2006 Report Share Posted July 12, 2006 The extra degrees are to ensure proper tightening, usually with crucial components like axle nuts and such. The reason you torque in terms of degrees and not with a torque wrench is for precision: torquing 120* with a torque wrench is the same as torquing 120* with a broom stick.The goal is to get the proper amount of "bolt stretch." At a certain point, the tension force between the threads of a bolt and its host socket are sufficient enough to actually "pull" the bolt, stretching it. It's not much you can see with the human eye, and it's always within the limits of elastic deformation (the bolt will recover from being stretched). Link to comment Share on other sites More sharing options...
yangotang Posted July 12, 2006 Report Share Posted July 12, 2006 oh no breaking bar!! Whats that?Basically nothing more than a really long bar which has an end which you can put a ratchet on. Link to comment Share on other sites More sharing options...
erikv11 Posted July 12, 2006 Report Share Posted July 12, 2006 oh no breaking bar!! Whats that?A breaker bar is just a long bar that takes sockets. It doesn't even have a ratcheting mechanism on it. You use the breaker bar to break loose stubborn bolts, or for cranking down when tightening, that way you don't ruin the ratchet head on your regular ratchet, and don't ruin the torque wrench by cranking on it.He just means: don't use the torque wrench for the extra 120 degrees after the click. Use some other, less sensitive wrench.Basically nothing more than a really long bar which has an end which you can put a socket on. ;) Link to comment Share on other sites More sharing options...
yangotang Posted July 12, 2006 Report Share Posted July 12, 2006 erik ftw.... goofed up there. Link to comment Share on other sites More sharing options...
ThaBigO Posted July 13, 2006 Author Report Share Posted July 13, 2006 Sounds good then guys for all the info then. Looks like ill be adding one of those to my tool box then.THanks,Orlando Link to comment Share on other sites More sharing options...
crazykn Posted July 13, 2006 Report Share Posted July 13, 2006 Oh god, I don't know where i'd be without a breaker bar. Like rotating tires, using the little lug nut thingy in the trunk doesn't cut it, too much effort needed, while the breaker bar makes it a piece of cake. I always keep one in my trunk with the spare no matter what. Unfortuantly my torque wrench is too big and long to fit...Yeah, a torque wrench and breaker bar are great tools! by the way, here is a tip to keep the (clicker type) torque wrench accurate:When storing it, after use, you should de-tension it, by setting the torque wrench at or under 25% of full tension (the max tension being the highest torque setting possible). But don't try turn it past the lowest setting, as it might damage the whole thing. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.