套環

The shaft fits snugly and the set screw locks it down without any wobble, even under vibration. I swapped it onto my bench saw in under five minutes and it hasn't budged since. Exactly what I needed for the 8mm size.

The set screw holds the 8mm shaft firmly in place on my drill press, no wobble at all. Installation was straightforward and it feels solid.

Installed this on my bench saw and the 8mm shaft fit was snug with zero play, exactly what you want for a torsion spring. The set screw held tight through a full afternoon of cutting without shifting.