Swiss-type lathes (Citizen, Star, Tornos) hold workpieces with a sliding guide bushing for ultra-rigid small-diameter turning — the chosen platform for medical implants, watch parts, and connector pins.
Workpiece Profile
- Diameter typically 1-32mm
- Length-to-diameter ratios up to 20:1 (impossible on standard lathe)
- Tolerance ±0.005mm common
- Volumes 1k-1M parts/year
Tool Holder System
Swiss machines use small modular tool blocks. Common standards:
- Citizen-style — Square shank gang tools, 8x8mm to 16x16mm typical
- Star-style — Quick-change cartridge system
- Cool Blast — Through-tool coolant directing
Insert Size
Swiss machines run smaller inserts than standard lathes:
- Turning: CCMT 06 02, DCMT 07 02, VBMT 08 02 (small IC)
- Threading: 11ER, 16ER (smaller pitch capability)
- Grooving: 1mm-3mm width parting blades
- Drilling: 0.5mm to 8mm carbide drills with through-coolant
Tool Recommendations
| Operation | Recommendation |
|---|---|
| Stainless 316L turning | Iscar IC908 in CCMT 06 02 04 |
| Titanium turning | Sandvik S05F submicron in CCMT 06 02 02 |
| Free-machining brass | Polished uncoated CCGT 06 02 02 (very sharp) |
| Deep parting | Iscar Pent-Cut GFN 1.5 (1.5mm width) |
| Drilling 1mm pilot | YG-1 ADO solid carbide |
Coolant Strategy
Through-tool oil (mineral or vegetable cutting oil, NOT water-based emulsion) at 30-50 bar. Water-based coolant rusts the precision guide bushing.
For small-IC inserts, browse our insert catalog.
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