Torque Conversion Ftlbs to Inch lbs ????????????????????

I hav a 3/8 torque wrench with only inch lbs and Nm engravings on it. But XJCD tells me to torque 70ftlbs for axle nut...Anyone good at conversion?

 

Multiply by 12 (12 inches in a foot)

70 X 12 = 840 inch*lbs. Bet the wrench doesn't go that high.

 

Thanks micarl

 

MiCarl is correct. Also 70 ftlbs is equal to 94.9 Nm.

I dunno if I'd be real bothered with exact torque on axle nuts....as tight as you can go by LIFTING action on the spanner and still be able to undo it by hand would be good enough would do me OK for an axle nut, it's not like it's soft alloy, and so long as you aren't using a rattle gun I reckon you'd be OK. But that's just my personal opinion, no doubt the purists will be horrified

 

I just lookd up in the owners manual and it has conversions as blw.
TO CONVERT FT LBS in to INCH LBS
Multiply by 0.08333 or divide by 12
Eg. 70 ft lbs EQUALS 5.833 inch lbs.

Now my Torque wrench doesnt go that low...what a shame !!!

 

Safe bet. An inch-pound torque wrench is not up to the task of axle nuts.

As tight as you can possibly imagine is good if you don't have a torque wrench that goes that high.

littlegiant; that's wrong-- 70ft/lbs DOES NOT equal 5.88 inch/lbs. you did it backward.

 

I use a little program called "Convert", which takes all the hard work out of this type of problem. It's coming up with 840 inch pounds for 70 ft lbs.

Think of it in terms of leverage: if you had a 70 lb weight sitting on top of the end of your spanner and your spanner was 1 foot long, then would the same amount of force be exerted by a 5.833 lb weight sitting 1 inch away from the nut ?

Or use the see-saw analogy...If we had a little giant sitting at one end of the see-saw and a large midget sitting in close to the crossbar which one...

err... forget that one!