excactly,which is why im asking whats it for,they would not have gone to all the trouble of designing a complex part that didnt have a purpose,im just buggered if i know what it does lol
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Maybe a transportation aid? Looks like it's supposed to be (and is) sprung open which suggests it's otherwise screwed shut (unless there's a relay mechanism somewhere). Looks a bit half baked to be part of the mech, and the angled profile suggests its not got a braking function.
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Having seen one in the flesh my best guess is that it is a damper for vibration being transmitted up the spindle.
i dont think so,there are no screws or screw holes on it to screw it tight against the boss,in operation the spring gives just a little pressure so lightly grips the boss whist the tt is running.
You would have thought it would have had a felt inner for that, or some method to stop noise.