Didn't think you could grind a catheter or polymer? We grind them all the time. No worries on passing your bio-testing either. We have been grinding polymer extrusions, catheters, and dilators for decades. Need a tight tolerance on your polymer rods for a Swiss-Screw application - no problem.
Stacking tolerances too tight to reflow or perform tip forming operations? We can grind it. Catheters for Intravascular imaging, Pellethane lead bodies, PTFE dilators, PEEK components for TAVR, and all kinds of polymers to prep for Swiss-Screw operations.