Of course there is clearance in the quill, and thus more play for the spindle run-out. But the amount is minor.
The possible plus of this arrangement is you could turn the head for a taper on one end of the part, while the quill can cut a diameter on the part. Might be a time saver on a production job.
Carl.
On 4/5/2025 2:53 PM, Peter Brooks via groups.io wrote:
Seems the sliding spindle is called the ‘quill’…
?
I wish the U3 had this feature but does it affect accuracy? Does it introduce play in the spindle?