Torque specifications

[Mark Worthington]

Pat, I've been trying to get a good deal on a 37-degree tube flaring tool off of ebay for a few months now...I'll shoot you an email tonight.

I am also a big fan of Mr. Smith, his technical know-how, and his writing style. I'll check his Nuts, Bolts, Fasteners and Plumbing Handbook tonight, but I remember seeing stuff like bolt-stretch-being-more-important-than-torque-values rather than any sort of rules of thumb that a dummy like me could use. I've also seen some highly technical web sites for calculating torque of fasteners, but the inputs are many and pretty much above my head (requiring calculations of load, duty cycles, metallurgy, etc.).

[ April 29, 2003: Message edited by: Mark Worthington ]

 

I remember seeing a chart in one of my automotive books on general torque specs for bolts based on grade, size and thread pitch, if you still need i will see if i can dig them out.

 

[Mark Worthington]

Hi Robert,

I was wondering if RF has developed any torque specifications for various fasteners in the kit. Stuff like suspension bolts, rod ends, calipers and dogbones, pin-drive adapters, engine and tranny mounts, etc. Now that I think about it, there are a lot of fasteners.

Even something simplistic would be helpful, like torque as a function of bolt diameter.

Thanks in advance.

 

If my memory is correct, Carroll Smith lists something like 30 ft. pounds for 3/4 suspension fasteners (I've converted from inch pounds which is the way he lists it). You may want to check his book on fasteners - I fell in love with it.

By the way, if anyone would like cheap prices on extra AN hardware (I changed all my bolts, nuts and washers over from Grade 8 to AN) let me know. Here I have to blame Carroll Smith, but his no-nonsense style made me a believer.

I also have a nice AN tubing flare tool I'd be willing to share with a trust-worthy soul.

 

[Brian Kissel]

Depending on how scientific, you want to be, here is a great calculator. It is as easy as apple pie to use. It should be here :bolt torue calculator
I hope you like it also !!!
Brian