Originally Posted by
merlinextraligh
Have you, or anyone else ever overtightened a locking?
I repeat don't cross thread it, grease it, and tighten it till it stutters and it works fine.
Conversely, many people have under tightened lock rings and had their cassette come loose.
BTW the torque spec for a cassette lock ring is a minimum spec, not a range or a maximum
Yes, have a friend who didn't consider the torque spec stripped the threads right off the lockring.
You can recommend whatever you want on here -- its the internet, but I'm going to recommend otherwise to save the few who do read my post a possible headache.
As for your minimum spec -- According to the manuals:
Shimano Dura-Ace Last 3 Generations: 35-50 Nm
Shimano Ultegra Last 3 Generations: 35-50 Nm & 30-50 Nm
Shimano 105 All Generations: 30-50 Nm
All SRAM 10 Speed Cassettes: No mention of minimums or ranges, just that "Tightening torque IS 40 Nm"
All Campy 11 Speed Cassettes: No mention of minimums or ranges, just that "Tighten the lockring which is provided with the Campagnolo sprockets on to the freewheel body to 40 Nm.
Sure there's probably some amount of safety margin in documented vs. real built into it but the point is -- just going by "when it stutters" isn't good enough for many inexperienced people. You've developed a feel for it obviously but others may just keep on truckin for another good rotation after the stuttering. Or they may grease the contact points of the lockring and feel less stuttering.