SWISS-TYPE CNC TURNING & MICRO-FABRICATION

Swiss CNC Lathe Micro-Turning & Parting Toolpath Vector Guide

Swiss-type automatic lathes (Citizen Cincom, Star Micronics, Tornos) produce high-precision micro-machined parts for medical implants (bone screws, dental abutments), aerospace connectors, and luxury watchmaking. By feeding the stock longitudinally through a carbide guide bushing, Swiss machines minimize bar deflection during heavy turning and micro-grooving.

1. Bar Deflection & Stickout Limitations

Deflection $\delta$ at the workpiece tip is calculated via cantilever deflection: $\delta = \frac{F_c L^3}{3 E I}$. Maintaining stickout $L \le 3 \times D_{\text{bar}}$ ensures deflection stays under $5\,\mu\text{m}$.