Rear linkage arm torque

[rabbitstu]

Hi guys,
Just had a 'buggerit!' momment.
After inspecting and regreaseing my rear arm suspension linkage like the caring biker I attempt to be, I refitted the suspension linkage arm to the frame and checked the torque required for the nut and bolt in the Haynes manual. 48Nm was given. This seemed a little high as this particular bolt is smaller than the other linkage bolts but trusting in Haynes I went ahead and *----!~# stripped the thread! Is it me? Has anybody got a different torque setting for this or did I just have a dud bolt?
Any replies welcomed, particuarly sympathetic ones as I'll now have to wait till next weekend before I can get to Fowlers to get a replacement bolt (unless anyone knows of a good internet source).

[max900]

Greetings

not very helpful im afraid but 48nm is what my manual says aswell
it is possible that your bolt was simply kn*ckered from all the years its been doing its job and getting covered in all sorts of crud
its also possible your torque wrench isn't calibrated so you were actually putting more pressure on than you set it at

[HRHpenfold]

use common sense and just do it up tight, all the linkages that i have had apart, ive never used a torque wrench on them

[rabbitstu]

The bolt that conects the linkage to the frame is M10 as opposed to the other bolts which are M12 size I believe. These seem fine and the torque seems reasonable for this size of bolt but a little over the top for an M10. I don't think I've any problems with the torque wrench. Thanks for the replies guys.

[rabbitstu]

Just been doing some nerdy checking of appropriate torque for different thread diameters. For a 10mm bolt or nut 29.43 - 39.24 N-m is recomended and 49.05 - 58.86 N-m for 12mm.
48 N-m was just too much for the 10mm bolt and nut but fine for the other two 12mm linkage bolts. The Haynes manual must have overlooked the difference in bolt size. I've learnt my lesson!

Jesus, I'm becoming a little too nerdy for my liking (train spotting here I come!).

[HRHpenfold]

torque figures are also quoted with dry unlubed threads, once you lube them, the quoted torque figures are meaningless

[rabbitstu]

I must confess I like to use a bit of lube ;D