Stahlbus brake bleed valve - right front for 22 RS

[Grumpy Goat]

I've just had what - to me - was a very strange conversation with Speedbleeders. Apparently, there's no strength difference between the standard and stainless units, which I find unlikely.

Secondly, and from an engineering perspective this is plain wrong, the person I spoke with recommended a 6-side wrench, and specifically not a socket, further, a specific make-up torque wasn't suggested.

This latter I find ridiculous as the implication was that too much torque would be applied and the bleeder would be snapped off.  I quote "you can't feel with a socket".

To the very best of my knowledge, every thread is designed for a specific torque and I even have a couple of tools which go down to tools which go down to 3 NM.  Bicycle people probably have many of the same tools.

Overall the conversation wasn't confidence inspiring.

We could have many discussions on fastener torque but at the end of the day the torque applied to a fastener is not dependent on the thread geometry, but on the desired clamping force. If the shank on which the threads are laid is weak then the torque specified could be limited by the shear capacity fo that shank as opposed to any clamping force that may be contemplated. That is shy Speedbleeders are suggesting that there is no [discernible to the wrist] strength difference between the standard and the stainless units.

I agree that the lack of specification of torque is bordering on the ridiculous, but when it comes to the low value of same (due to weakness of the shank of the tiny bleeder) then it makes sense. I do have some personal experience in this area.