guy in the shop today asked me how many newtons for the wee bolts on lockon grips. i told him around 6-7 but not to go much higher. anyone out there know the real number? they were on monkey lite bars. cheers guys and gals
OMG
fackit i know. but you got to have the answers if your a mechanic. and you could crush a carbon bar..... so you dont know?
Sir Isaac Newton told us why
an apple falls down from the sky.
And from that fact it's very plain
all other objects do the same....
RTFM
cheers guys. i did go to eastern first and they "couldnt tell me" its a pretty simple question. does anyone know?
They couldn't tell you eh...
I'd say you "well I can't stock your product then" bloody tossers!
well my bontrager lockon's are marked 2nm so I'd say 5 would be max!!!!!!!
4.5321
Enough to stop them slipping - and no more.
enough newtons so that it doesn't move, no so many that you break the ikcle bolts
Forget the torque on barends and grips fitted to carbon bars.
Grease the bolts in the lock-ons lightly and tighten them by hand evenly until they hold enough for what you plan to put them through.. and no more.Dont go by the recommended torque as a lower torque could be all you needed in the first place.bonus! Just remember to give them a decent real world test without swinging from them like a monkey if its stuff you are fitting for a customer.No point in stressing stuff for no reason either so use yer head on this one.
Obviously diff riding styles will be more of a problem (like grips that need to be tight for 4x stuff like coming out the gate or the likes of carbon bars on bmx racing bikes like Answers expert bars) but for me, i tighten enough for my loose hold of my grips on my mtb as i dont heave about on the bars on the mtb at all.Its the same when fitting carbon bar ends to carbon bars.You can go by the feel and often torque a bar end enough without getting near the recommended torque.. and not budge the bar end unless you were to really give it a good tug.. Something that they shouldnt be put through during normal use and another reason that could help save them if you crash.
Any manufacturers that would rather go against this idea, feel free to post and tell everyone to go right up to the recommended torque.
as my old gaffer would say-"untill it snaps, but half a turn back" thats real engineering! 😀
how many newtons? depends how long your wrench is...
*shakes head in disappointment* 🙂
anyway i bet you'd strip the puny M2 thread or round off the screw head before you do any damage to the bars
(i suspect someone is about to prove me wrong)
just give them a nip until the grips don't budge anymore
I bought the Ritchey TorqueKey which is set at 5nm, seems I was doing them up less by hand, but still tight enough.
OT But does the question mean that you are paying someone to put your bars on?
I thought most manufacturers would say not to use lock on grips on carbon bars?
Why? What magic power do you think keeps the controls on?
err I don't know just something in my head, but I guess as how do the bars clamp to the stem!!
Bit of a d'oh moment... on a Saturday whilst waiting for a plane to see my wife and son when I've been away with work for a week..
Sorry..
Same as for alloy bars.
carbon bars are strengthen around the areas were you put the grips, brakes etc etc they are built to take it.
Best way is to simply tighten the bolt using the short end of the allen key as the lever instead of the long end, you get about 4-5N max. I do that with all the bolts on my bikes and have never had a problem.
nuke it from space, only way to be sure
Just pinch tight. As an earlier post said, and as I have experience of, the head on the tiny allen bolt will go long before the bar gets crushed. Then you have to drill it out and buy a new bolt (which is difficult to find!)
7nm is by the way far too much force. It's 1-2 at most I would have said, but 'pinch tight' is enough. at those very low torques a torque wrench isn't much good as the tolerances that they are calibrated to aren't generally close enough.
bustedcarbon always makes me LOL.
"Carbon should be indestructible".