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DEW Home›Machine Tools & Manufacturing Equipment›Swiss Machines
Machine Tools & Manufacturing Equipment · Category Intelligence

Swiss Machines

Sliding-headstock lathes that support the bar right at the cutting tool through a guide bushing — so they turn small, long, slender precision parts without deflection. The pick is driven by bar diameter, part complexity, and how much you gain from doing everything in one cycle.

◆ Deep category · engineer-grade decision intelligence

Product types

Where engineers draw the lines within swiss machines.

Guide-Bushing (traditional Swiss)
Bar is supported at the cut by the guide bushing — near-zero deflection on long slender parts. Needs longer, ground bar stock.
Non-Guide-Bushing / Convertible
Runs without the bushing to use standard (cheaper) bar and cut remnants short — convertible machines switch modes for flexibility.
Multi-Axis / B-Axis Swiss
Extra axes and a B-axis for angled/complex features and simultaneous machining — done-in-one on intricate medical and micro parts.
Sub-Spindle Swiss
Sub-spindle takes the part for backworking so complete parts drop finished — the norm for high-volume turned components.

Specs that matter

The numbers to compare first — and which are hard deal-breakers.

Max bar capacity (mm)
The hard ceiling on part diameter — Swiss shines from ~1 to 32 mm.
Deal-breaker
Number of axes / tool positions
Determines part complexity achievable in one cycle.
Deal-breaker
Guide-bushing vs non-guide-bushing
Bushing = ultimate slenderness ratio; non-bushing = cheaper bar and less scrap.
Key
Sub-spindle & backworking tools
Enables complete parts off the machine with no second op.
Key
Live/rotary tooling & C/Y axis
Cross-holes, milling, and off-center features on turned parts.
Key
Max spindle speed (rpm)
Small diameters need very high rpm for correct surface speed and finish.
Key
Simultaneous tooling (tool overlap)
Cutting on main and sub at once slashes cycle time in high volume.
Nice-to-know
Bar feeder & high-pressure coolant
Unattended running and chip control in deep, small-bore features.
Nice-to-know

How engineers decide

Rules of thumb behind the common trade-offs.

Swiss or standard turning center?
Swiss when length-to-diameter is high (slender parts) or the part is small, complex, and high-volume — the guide bushing removes deflection a chucker can't. Standard turning for larger diameters and shorter parts.
Guide bushing or not?
Bushing for long slender parts needing the best straightness and finish — but you pay for ground bar and lose a bushing-length remnant. Non-guide-bushing for shorter parts, standard bar, and less scrap.
How many axes do I need?
Count the operations on the print — cross-holes, milled flats, backside features. Each drives axes and live tools. Buy for the part family, not one job, but don't over-buy programming complexity.
Why is finish poor on tiny diameters?
Usually surface speed is too low because rpm can't reach target SFM on a small diameter — verify max rpm supports your smallest diameter, and check tool sharpness and coolant.
▼ From the field

What goes wrong — War Stories

Expensive failure modes engineers design around.

⚠ Chatter / poor finish on slender parts
Cause: Bar deflection or vibration despite the bushing, dull tools
Design around it: Keep the tool at the bushing face, sharp tools, correct SFM, and high-pressure coolant; check bushing fit to the bar.
⚠ Bar-to-bushing seizing or scoring
Cause: Wrong bushing clearance or out-of-round/undersize bar
Design around it: Use ground bar to spec, set bushing clearance correctly, and keep it lubricated.
⚠ Chip wrap in deep small bores
Cause: Stringy chips with poor evacuation in tiny features
Design around it: High-pressure through-tool coolant, correct chipbreaking geometry, peck strategy.
⚠ Part length / pickoff variation
Cause: Sub-spindle sync or part-off timing off
Design around it: Tune part-off and sub-spindle grab, verify with first-article length checks.

Key builders

Manufacturer-direct sources we anchor specs to.

Citizen (Cincom)Star MicronicsTsugamiMarubeni Citizen-CincomTornosNomura DSHanwhaGanesh

Standards we hold specs to

ISO 230Test code for machine-tool accuracy & repeatability
ISO 23125Safety requirements for turning machines
DIN 59360Precision ground bar stock tolerances (guide-bushing feed)
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