Slitting Saw Arbor..Precision..Near flush cut

[wizard69]

Hmm, never noticed any slip, but I've never marked so I could observe slip. Another of those noob assumptions I guess.

I'm with mklotz on this one, with manual machining you are likely better off without a key. If the blade binds you want to stop as quickly as possible, but even doing so the blade can still shatter before you hit the stop button. Even so the cutting action of the blade often tightens the clamping mechanism so tight it really doesn't matter if there is a key or not.