Vex Shift Rod through 3/8 Hex Shaft?

[AdamHeard]

Originally Posted by KohKohPuffs

My applications for using a shifter rod in a 3/8" hex shaft is for a brake for an arm gearbox. I would prefer to use COTS parts for the sake of machining time and because I know through experience that those work perfectly well without failure (as much). My main concern is if there's a limit to what size hole you can make in a shaft for the shifting rod to go through. Of course, I'm not going to make a hole in a shaft and leave only 0.01" of wall thickness, but I'm wondering if there is a general rule to follow.

A dog gear doesn't make a great brake. It takes quite a bit of force to remove under torsional load compared to more traditional brakes.