How to torque?

[David - Alabama]

Need to tighten 9 bearing retainer nuts to 130-150 ft lbs according to manual. Torque wrench head won't let me get socket on nuts. Anyboby have a formula for "guessing" at torque? Maybe - stop when knuckels pop or pull til eyeballs buldge.

 

[daivd8n]

in that situation I would use a torque adapter which is basically a little wrench that fits on the socket head that you can hook your torque wrench onto other then that no clue

 

[Lou from Wi.]

Crows foot on the torque wrench.Better is a flare nut crows foot,less chance of slipping or rounding the nuts.Both can fit on the torque wrench. HTH.
Regards,
LOU & VICTOR

 

[Marbarger farms]

You could either use a crowsfoot or a torque adaptor. Or you could find a junk wrench that is the correct size for the nut and grab a junk socket and weld the socket to the wrench to have a homemade torque adaptor/ crowsfoot.

 

[Rod (NH)]

<a href="http://www.trialsnuts.com/TORQUED.pdf">Torque Adapter</a>

 

[Bob]

Hang 43 - 50 pounds on a three-foot-long wrench!

 

[bc]

If that is a 3/4", you can put an wratchet adapter in the box end. Otherwise I'd probably stick a dutchman in the box end to make the torque wrench work. You do most of the tightening with the end wrench anyway.

 

[Jon Hagen]

Use a crowfoot wrench, installed 90 degrees to the side of the torque wrench head. The torque should still be very close.

 

[Heat Houser]

Measure the length of your wrench in inches. Divide by 12 to get feet. Divide the feet into the required torque. This is how much force you have to pull on the wrench out at the end. Example: 18 inch wrench divided by 12 equals 1.5 feet. 150 divided by 1.5 equals 100 lbs pull required. Go to town and buy a spring scale and attach it to the wrench and pull on it. When you reach 100 lbs, stop.
Another....20 inch wrench....20/12=1.666
150/1.666=90lbs pull needed.

Hope this helps.

 

[jokers]

Yup, I agree. Close enough.

 

[David - Alabama]

Really appreciate the replies guys. You know there are some smart and experienced people that frequent this site.

 

[RodinNS]

Use the box end, then hook the next size wrench onto the open end, by it's box end... and pull until it's tight. That'll be close enough for that.

Rod

 

[trucker 40]

I don't remember exactly how they figured it,but in an old Caterpillar manual they had a way of putting torque on bolts that would be like put a 10 foot pipe on a wrench and have a 150 pound man hang all of his weight on it. On something like that a wrench with a pipe about three foot long,and pull until its tight,would probably work.Or like somebody else said hook a box end into the open end and pull on that.

 

[Gene Davis (Ga.)]

My father used to do this job on large connecting rod bolts. He had a breaker bar handle that was 2 feet long and hooked to the end of it was a pull type spring scale attached to a loop on a large bar placed in a pivot point position. He would have me pull the long bar and when the spring scale read 1/2 of the desired torque(because the wrench handle was 2 feet long) it would give him the desired foot pounds of torque.

 

[guido]

HEllo trucke 40,
I posted that formula awhile back.
Did not get too many takers. It was out of the Cat repair manual as you said from school.
I aslo told the" NON BELIEVER " that there was a guy who said: Give me a long enough lever and I can move the world.OR....................
The bigger the extension the less effort is required for the final torque. The reason it is called pounds foot: It is based on a 1 foot lenght. 1 pound weght 1 foot lenght
eqauls 1 foot pound of torque!!!!!!!!!!!!!!!
I know you were not the guy, anyhow............. keep on trucking.
Guido.