The Tolerance Gap Is Getting Tighter
Medical device OEMs have always demanded tight tolerances. But in 2026, the requests we're seeing go beyond what 3-axis machining can reliably deliver-especially for implantable components and surgical instruments with complex freeform surfaces. Multi-axis machining, particularly simultaneous 5-axis, is becoming the baseline for these applications, not the premium option.
A Real Example from Our Floor
We recently completed a batch of titanium alloy (Ti-6Al-4V) tibial tray components for a U.S. orthopedic client. The part features a porous surface structure for bone ingrowth, machined directly into the substrate. Achieving the required 3.2 μm Ra surface finish on the contact surfaces while maintaining ±0.025mm positional accuracy on the mounting features required 5-axis simultaneous finishing with custom ball-end tooling.
The setup was complex-three operations, two fixture changes, in-process probing after each transfer. But the alternative would have been EDM or additive manufacturing at significantly higher cost and longer lead time. Multi-axis CNC split the difference: precision of advanced processes, speed and cost structure of conventional machining.
What Medical Buyers Should Verify
When sourcing precision medical components, "5-axis capable" on a supplier's website doesn't tell you enough. Ask specifically:
Do they use simultaneous 5-axis or just 3+2 positioning? The former achieves true freeform surfaces; the latter is limited to angled planar features.
What's their in-process inspection protocol? For medical work, we use on-machine probing and post-process CMM verification with full traceability records.
How do they handle titanium's thermal sensitivity? We run cryogenic coolant delivery on our medical cell to prevent heat-affected zone issues.
The Certification Layer
Medical device machining isn't just about machines-it's about systems. At PFT, our medical work runs under ISO 13485 protocols, with dedicated tool management and material lot traceability. The 5-axis capability enables the geometry; the quality system ensures it's repeatable and documented.