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Rear hub torque	Please Register to enjoy additional Member Benefits

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Dean001 United Kingdom

Sat Oct 23 2021, 01:19pm

Member No: #58986

Joined: Oct 23 2021
Location: Caerphilly

I'm a Newbie so please go easy if htis is not hte right thead to post in, i'd appreciate direction if it is not, thanks.

I have read and digested all the information on rear hub nut torque of 280-300NM
however i am confused as to how people have arrived at that value;
Citroen tech. doc says 9 +/- 0.9 m.daN, angular tighten to 29 +/- 5deg.

My question is how does 9 m.daN convert to a torque in NM, as i beleive m.daN is a force?

Thanks very much for your understanding and help here.

vexorg United Kingdom

Sun Oct 24 2021, 06:57am

Member No: #48843

Joined: Jul 06 2017
Location: Scotland

NM (should be Nm) - newton metres is the same as m.daN time 10.

'da' is the SI prefix for deca, so 10N = 1daN

Nm is also a kind of force, but an angluar force, it's the newtons of force applied to 1m of leverage.

So 9 +/- 0.9 m.daN, angular tighten to 29 +/- 5deg is 90Nm + 30 degrees, or probably as tight as you can go (unless you are the hulk's brother).
Though 30 degrees seems a bit small compared to other cars I've done, even with the 90Nm pre-torque. It's only about 65lbft in real money.


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