santa just left me a ftvb but my torque wrench is in inch # is there a formula or some way to convert to foot #. like does 12"# =1'#

 

Mine measures both so let me know how many of what and I'll tell you what mine says it is equal to.

 

Ummm...yes.

 

as soon as my wife will let me open the box ill ask you for the conversion thanx

 

12'' lbs = 1' lbs

 

Who's the boss in your house? Never mind...I'm married also.

Woody: What kind of torque wrench do you have? I would like one that measures both.

It is a simple conversion: http://www.theleeco.com/LEEWEB2.NSF/...3?OpenDocument

 

Just multiply the ft-lbs torque spec by 12 and you will have the inch-lbs torque spec.

i.e., 5ft-lbs * 12 = 60 in-lbs

 

I thought you had to use an inch lb torque wrench to put in the valve body?

 

You do.

 

You should use an in-lb torque wrench because they are more accurate then a ft-lb torque wrench at lower torque numbers.

For example, an in-lb torque wrench may have a range of 1 – 100in-lbs which translates to a max of 8.3 ft-lbs (100in-lb / 12in-lb = 8.3ft-lbs). Usually when a tool or gauge gives accuracy it is rated at full range. Example, if you have a 100in-lb torque wrench with a 0.05% accuracy that means 0.05% across the scale. That means if you torque a bolt to 100in-lb you will actually get a torque of 95in-lb to 105in-lb.

If you now go and use a ft-lb torque wrench that has a scale of 0 – 100ft-lbs it translates in inch pounds to 0 – 1,200in-lbs. So if that foot pound torque wrench has the same accuracy of 0.05% (full scale) and you go to torque a bolt to 100ft-lbs it will actually be between 95ft-lb to 105ft-lb.

Since your 0.05% accuracy on a 100ft-lb torque wrench translates into a 5ft-lb error, no problem if a bolt calls for 80 – 100ft-lbs of torque, but that 5ft-lb of error for inch pounds translates into a 60in-lb error (5ft-lb x 12in-lbs = 60in-lbs).

So if you go and use a foot pound (ft-lb) torque wrench to torque something that calls for inch pound you will NEVER get an accurate torque on the bolt or nut. You will either over torque it or not torque it enough.

That is the reason there are two complete different tools to torque nuts and bolts and that is why they are called out in either inch-pound or foot-pounds because of the tools accuracy…

You could however torque something that has a foot-pound rating with an inch-pound torque wrench since the accuracy would be much better then the foot-pound torque wrench but you don’t see too many inch-pound torque wrench’s that go above 200in-lbs (16.7ft-lbs). Besides you don’t want anything rated much more then 150in-lbs because then your accuracy starts to affect you ability to properly torque bolts and nuts to their rated specifications in inch pounds.



EDIT: I had 0.5% which should have been 0.05%

 

well i guess that about covers it merry xmass and thankyou

 

That is very useful information.

 

Thank you and your both very welcome…

I did have to make an edit to my original post. I had 0.5% when it should have been 0.05%. I think many torque wrench’s have better accuracies but I just used the 0.05% for simplicity.

 

Actually, to be mathamatically correct 0.05% (or five-hundredths of one percent as it is written) error on 100 ft.-lbs. produces an error of 0.05 ft.-lbs. One-percent of 100 ft.-lbs. is obviously 1 ft.-lb., so 0.05% would be five-hundreths of that or 0.05 ft.-lbs. Now if by 0.05% you actually mean 5% (which would be 0.05 x 100 to give the percentage) than your 5 ft.-lb. number is accurate. Perhaps a matter of semantics...

 

We don't know simple math here>??? Weren't we all taught 12 inches equals a foot in like 1st grade>???

Also remember you do not want to install the accumulator body with a FT LB torque wrench. Use the inch pound wrench. -Mat-