Hello Everybody,
I have am in the process of building a Milling Spindle for the Vertical Slide of my Myford Super 7.
I have completed the spindle with two adjustable bearings on the cutting end, with two plain bearings on the pulley end. It has a No. 2 Morse taper to accept tooling.

I am driving it with a 500 Watt E cycle motor, with variable speed controller, it runs just great.
The set up shown which will be mounted on the cross slide has a center distance between the shafts of 250 mm.
Can anybody help me with an idea of driving the spindle with the motor…
But….
Allowing the vertical slide to be adjusted up and down.
Other than adjusting the centre distance with every height adjustment.
I put it to the brains trust.