Swiss-type sliding-head CNC lathe for precision turning of small-diameter parts — medical screws and hydraulic components
Ø 0.5–32 mm · L/D 100:1 · 24/7 Unattended Production

Swiss-Type Sliding-Head Precision Turning

Specialist in sliding-head CNC bar turning on Citizen, Star, Tornos and Tsugami machines. From Ø 0.5 mm medical screws to Ø 32 mm hydraulic bodies — L/D up to 100:1 with 0.003 mm TIR concentricity.

Diameter range

Ø 0.5–32 mm

Concentricity

0.003 mm TIR

Accuracy

±0.003 mm

Operating principle

Why Swiss-Type Turning Delivers Unmatched Precision

Three fundamental principles explain why sliding-head lathes produce better results than fixed-head machines for small-diameter and slender parts.

01

Bar guided as close as possible to the cutting zone

On a Swiss-type (sliding-head) lathe, the bar slides axially through a guide bushing positioned a few tenths of a millimetre from the cutting tool. This close guidance eliminates bar deflection and enables exceptional concentricity and straightness, even on slender parts with L/D > 4. The preferred technique for small-diameter precision turned parts.

02

Multi-operation in a single pass

Multiple independent tool slides work simultaneously: external turning, axial drilling, transverse milling, threading, parting. A complex part with up to 13 operations completed in a single machine pass — no manual re-clamping. Reduces cost for high-volume bar turning.

03

Continuous productivity — unattended operation

Automatic bar feeding and unattended accessories (bar loaders, in-line dimensional control, automatic part extraction) enable 24/7 continuous production. Very competitive from 500 parts and unbeatable on millions of parts.

Technical comparison

Swiss-Type vs Fixed-Head Lathe — Side-by-Side Comparison

Understanding which lathe type is optimal for your part is the first step toward competitive manufacturing. Key selection criteria below.

Feature
Swiss-Type (Sliding-Head)
Fixed-Head CNC Lathe
Max. bar diameter
Ø 32 mm
Ø 65+ mm
Maximum L/D ratio
100:1
5:1 to 10:1
Concentricity
±0.002 mm
±0.005 mm
Slender part vibration
None (guide bushing)
High risk
Operations per pass
Up to 13
3 to 5
Large-diameter parts
Limited to Ø 32
Up to Ø 200+
High-volume throughput
Very high
High
Setup time
Long (multi-slide)
Fast

Gold highlight with ✓ indicates the technically superior option for that feature.

Machine park

Swiss-Type Machine Technical Specifications

Our Citizen, Star, Tornos and Tsugami sliding-head lathes cover the full range from micro-parts in watchmaking to Ø 32 mm industrial components. All machines are equipped with automatic bar loaders for 24/7 unattended production.

CitizenStarTornosTsugami24/7 Production
Machine brands
Citizen · Star · Tornos · Tsugami
Max. bar diameter
Ø 32 mm
Min. diameter
Ø 0.5 mm
Max. turning length
320 mm
Maximum L/D ratio
100 : 1
Positioning accuracy
±0.003 mm
Axial repeatability
±0.002 mm
Concentricity (TIR)
0.003 mm
Standard surface finish
Ra 0.8 µm
Finish surface finish
Ra 0.4 µm
Max. spindle speed
10,000 rpm
Max. number of axes
13 axes
Bar feeding
Automatic 24/7
Markets served

Swiss-Type Turning — Applications by Sector

From sub-millimetre watchmaking components to Ø 32 mm aerospace fasteners, Swiss-type turning serves every precision industry requiring slender parts with tight concentricity requirements.

Medical & Dental

ISO 13485

Typical parts

  • Orthopaedic screws Ø 2–8 mm
  • Slender K-wires
  • Endoscopic instruments Ø 3 mm
  • Catheter connectors
Materials: TA6V ELI, 316L SS, PEEK

Hydraulic & Pneumatic

ISO 9001

Typical parts

  • Injector bodies Ø 3–15 mm
  • Control needles
  • Miniature check valves
  • Pistons and threaded rods
Materials: 316L SS, Brass, Bronze

Connectors & Electronics

ISO 9001

Typical parts

  • Connector contacts
  • Precision test pins
  • Cage nuts
  • SMD flanges
Materials: Brass CuZn39Pb3, Copper, SS

Watchmaking & Instruments

ISO 9001

Typical parts

  • Balance staff Ø 0.5–2 mm
  • Crown winding stems
  • Pinions & cannon pinions
Materials: Steel 20AP, Brass, SS

Automotive & Transmission

IATF 16949

Typical parts

  • Injection adjustment screws
  • Sensor shafts
  • Threaded inserts
  • Tensioning nuts
Materials: 42CrMo4 steel, 303 SS

Aerospace

EN 9100

Typical parts

  • Lightweight titanium fasteners
  • Linkage shafts Ø 4–20 mm
  • Self-locking nuts
Materials: TA6V, Inconel 718, A286
Technical FAQ

Swiss-Type Sliding-Head Turning — Frequently Asked Questions

On a fixed-head lathe, the bar is held stationary and the tool moves. On a Swiss-type lathe, the bar slides axially through a guide bushing positioned just ahead of the tools. This eliminates bar deflection during machining, enabling ±0.003 mm tolerances on long, slender parts — impossible in fixed-head beyond L/D of 5 to 10. We recommend Swiss-type turning as soon as the part is slender or requires concentricity below 0.005 mm.
Passez à l'action

Swiss-Type Turning Quote — 24h Response

Send your 2D drawing or STEP file. Specify diameter, length, material and quantity. Our team responds within 24 business hours with feasibility and pricing. Prototypes in 5–10 business days.

24h
Délai de réponse
ISO 9001
Certifié
±0.005
Tolérance mm
100%
Traçabilité matière