Sprocket nut...

[darrsi]

Well folks, so got to have at it this evening.


Thankfully,my earlier stopgap fix (basically just blue loctite and tighten it as mup as it would go) held up okay.


Undid the lock washer,old 9mm nut wasn't loose but did break free with not a huge amount of pressure.


Same thing as a week ago - loose for a turn,then socket on to turn it off.


Cleaned the thread and popped the new lock washer and 12mm nut on.


Socket was needed to get it on right from the start.
Got it nipped up then on to the torque wrench.


Started low (50nm) working my way upto to the recommended 90nm.


All seems good thankfully!
Will check it on Sunday when I'm cleaning/adjusting the chain.


I did use thread locker (more precisely,studlock - bondloc b270)
I went into an auto factors and asked for green loctite (270 according to Google) " what,I've never heard of that" was the reply
So he sent me to an engineering/agri supply place nearby and when I asked for "green loctite, 270" that was what I got.


Hopefully it's not overkill strength wise or I'll be cursing myself when i go to change the sprocket...time will tell I suppose


Will try figure out how to post some pics up.

If it's all done now and okay then don't worry about it, but i was gonna say the same as Fazersharp and mention that this subject has been discussed many times over the years and because each bike could have a slightly different issue around the sprocket nut area a lot of us came to the conclusion it might be worth playing it safe and using 80Nm instead of the recommended 90Nm because it is a wider nut and was still tighter than the thinner nut at 70Nm, and going full on with it might have an unpredictable/unfavourable outcome.
But a lot of these conversations were many years ago now, and there haven't been too many since about it in comparison after most people upgraded their sprocket nut, so it obviously helped improve things since then.