G'day Norm
Machining nylon rod is a specialist field.
I have had some experience in this.
A better solution may be available.
In my field, we have 'nylon shoulder washers'.
These essentially 'mimic' nylon bushes used on lawnmower wheels.
I would need good measurements to investigate alternatives.
But the clear message is: any nylon bush can be reproduced
at an economical cost in the modern world.
Cheers
Jack
