Torque advise please

[Sore Thumb]

I've got a chorus ultra-torque crank that needs 42nm. However I do not have time to go to the lbs to get it done at the moment. What sort of force does this crankset require in terms of guess it force?

Thanks

 

[Mr Pig]

That's about 30lb, which isn't that much. To put that in perspective most alloy wheel nuts, on cars, tighten to around 80lb so you want about half that.

A car torque wrench should go down to 30lb, can you get your hands on one of those? a neighbor maybe?

 

[hubgearfreak]

you don't need to guess what's 42nm. it is 42 newtons per meter.

extend your sliding t bar (pictured) on the correct socket to a meter in length. apply 42 newtons to the end. job done.

here's a clue....4.3kgs at earth's gravity would give you 42 newtons

 

[Mr Pig]

apply 42 newtons to the end. job done

So Mr Thumb, do you hasve a bag of newtons handy?

 

[spandex]

I had one round here some where

 

[hubgearfreak]

spandex, you're applying much more than 42 newtons to your arse.

i look forward to maybe a pint (or two) at the end of june?

 

[spandex]

spandex, you're applying much more than 42 newtons to your arse.

i look forward to maybe a pint (or two) at the end of june?

I am up for that but I do not know if the same pub will be open this time as it was flooded and they do not seem to be in a rush to open but there is loads more




ER just two? did you get told off last time?

 

[MichaelM]

you don't need to guess what's 42nm. it is 42 newtons per meter.

Nah - 42 nm is 42 nano metres. 42 N m is 42 Newton Meters.

There's a difference!!!

Personally, I use the "aye that feels about right " method.

 

[jimboalee]

Gravity's acceleration is 9.81 m/s^2.

Divide 1 kg by 9.81 and you get the weight of a small apple.

"What was that hit my head??" A Macbook Issac.

 

[jimboalee]

Nah - 42 nm is 42 nano metres. 42 N m is 42 Newton Meters.

There's a difference!!!

Personally, I use the "aye that feels about right " method.

????

Metres = French, Meters = US

 

[Tynan]

hang 4.2Kg off a metre of wrench is the poster's advice, a coupe of bags of sugar and perhaps some rice init?

 

[Aperitif]

This is all torque and no action...

 

[arallsopp]

Ouch Aperitif! That one hurt

OP: If you're blagging a torque wrench, be advised it might have some arcane imperial measures on it. There's a handy converter here.

Of course, the site will also tell you that the force required is equivalent to 10 international calories. That's roughly one and a half Cadbury's mini eggs, so pop down the shops now and get eating then burn it off

 

[hubgearfreak]

Nah - 42 nm is 42 nano metres. 42 N m is 42 Newton Meters.

There's a difference!!!.

you're right, there's a difference. but most people would take the reply as given and not be quite so pedantic

 

[hubgearfreak]

force required is equivalent to 10 international calories.

calories are a measure of energy, not force