Inch/lbs vs Foot/lbs

[thatguy]

Did you know there is a BIG difference between inch and foot lbs of torque?????

I was reading up on changing my trucks transmission fluid and adjusting the bands and didnt catch that the transmission band specs were given in INCH/lbs NOT ft/lbs...

I wonder how bad I would have messed something up if I had tightened the transmission bands down to 72 FT/lbs instead of the 72 IN/lbs specified..

It just goes to show you paying attention to details really can make a difference.. LOL

Just thought I would share that tidbit of info..

Brian

 

[Duffster]

About 12x as much LOL

 

[jdbower]

Almost enough to make you want to switch to Nm for everything?

 

[woodchuckie]

I actually tightened one of the bolts on the exhaust manifold of my 77 dodge p/u to foot pounds. Of course it stripped out. I used a helicoil on that one and got the rest of them right. No problem so far.

 

[RickB]

Did you know there is a BIG difference between inch and foot lbs of torque?????

I was reading up on changing my trucks transmission fluid and adjusting the bands and didnt catch that the transmission band specs were given in INCH/lbs NOT ft/lbs...

I wonder how bad I would have messed something up if I had tightened the transmission bands down to 72 FT/lbs instead of the 72 IN/lbs specified..

It just goes to show you paying attention to details really can make a difference.. LOL

Just thought I would share that tidbit of info..

Brian

Half the folks here would call that a manufacturing defect or design flaw.

 

[jinman]

Lots of fasteners are rated in oz/in of torque.

Just for argument, do you realize it should be lb/in and lb/ft instead of in-lb or ft-lb?

 

[Steveguy]

When you are referring to the torque output of an engine it is generally lbs.ft. When you are applying force to a wrench it is ft.lbs. (or inch lbs.)

 

[czechsonofagun]

Almost enough to make you want to switch to Nm for everything?

Exactly!

The idea from 1791 is slowly catching on, eh?

 

[RobertN]

Almost enough to make you want to switch to Nm for everything?

It would certainly be much easier

I still, need multiple torque wrenches; ie for lighter, medium, and heavy torquing.

 

[Duffster]

Lots of fasteners are rated in oz/in of torque.

Just for argument, do you realize it should be lb/in and lb/ft instead of in-lb or ft-lb?

When you are referring to the torque output of an engine it is generally lbs.ft. When you are applying force to a wrench it is ft.lbs. (or inch lbs.)

Does it really make a difference?

Does anyone have a link to some technical document that proves one or the other is correct?