Question about jeweler's saw blades/ arbors

[markba633csi]

I'm making a steel arbor for a 2.5" fine tooth saw blade to do some slitting in 360 brass. The blades have a 1/2" bore and a tiny 0.1" key. Will the blades hold well
enough without an arbor key or pin? (arbor will have 3/4" shoulder)
Mark S.

 

[mikey]

Yup, they will be fine without the key.