yes they have to be .otherwise how could u knurl a piece of bar that only needs 3 inches of knurl in the center of a 5 inch bar .the last end would be tapered to nothing and not be cut
Never have a problem Knurling on my Myford. It's an absolute doddle.
I remember why I'd been looking at videos now; there was a Cut knurling tool on ebay, having never seen one before I looked for videos.
The first shows a cut knurling tool, as you can see the knurls are at an angle to the workpiece.
In this one it shows a more common knurling tool, been used in the same manor