PVC tubing is very crude and will not be accurate.
I am reffering to an actual coupling.
Have a look on our website, there are quite a few options, on the bore sizes, and 6.35 and 8mm are standard.
Quote Originally Posted by HankMcSpank View Post
Do you mean like PVC tubing?

If so, the problem is the 'differing' diameters of the two end I want to connect ....ie M8 rod is erhm, 8mm(!) & the stepper shaft is 6.35mm ....???