Machining spiral spindles - GIF

Machining spiral spindles.

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Previously:

Beautiful spiral shaving drill machining - GIF
Brick spiral staircase - GIF
CNC plywood spiral staircase
Cutting spirals with a rose engine lathe - GIF
Fibonnacci spiral gears - GIF
How spiral compact fluorescent bulbs are formed - GIF

Why the touch in the middle before running the length?

I think he is getting the jig close to the lower bearing on the shaper. This is just to give him an idea of where the jig should be located so he doesn't nick the jig with the bit. Putting a nick into the jig would cause future pieces to also have the nick as the bearing would follow it.