Swiss Machining Capabilities and Machine Types
What a Swiss-type shop typically runs, what it can cut in one cycle and where the limits sit.
We are a matching service and own no machines. This page describes the equipment shops commonly run, so you know what to ask for. The shop that quotes you confirms what it can hold on your part.
Common machine types
Most small turned parts run on one of these layouts. Every one needs a bar feeder for production runs. Axis count and tool count vary by machine, so a quote should name what your part needs.
| Layout | How it works | Fits best |
|---|---|---|
| Guide bushing Swiss-type | The sliding headstock feeds bar through a guide bushing that supports it right at the cut. The standard layout for slender parts. | Long, thin parts and tight concentricity |
| Guide bushing-less mode | Many machines also run without the bushing. Short parts leave a smaller bar remnant. | Short parts and costly bar |
| Main spindle plus sub-spindle | The sub-spindle takes the part from the main spindle and finishes the back end in the same cycle. | Features on both ends |
| Live tooling and Y-axis | Driven tools mill flats, slots and hex and drill cross holes without moving the part to another machine. | Side features in one setup |
| Multi-spindle automatic | Several spindles cut at once. Setup takes longer, so the machine suits very large runs of short parts. | Very high volume, short parts |
| Conventional CNC lathe | A fixed headstock turns larger, shorter parts. Often the better choice above the Swiss bar range. | Larger diameters, short parts |
Common operations
What a Swiss-type lathe adds to a part, usually in one cycle and one setup.
Turning and grooving
Outside and inside diameters, tapers, grooves, radii and profiles in one cycle.
Drilling and deep holes
Center and cross holes. Deep holes need peck cycles and good coolant delivery.
Polygon turning
Hex, square and other multi-flat forms cut with a rotating tool while the part turns.
Threading
Single-point threads and thread whirling for long or fine threads on slender parts.
Knurling
Straight and diamond knurl for grip and press fits.
Back working and parting
Finish the second end on the sub-spindle, then part off a finished piece.
Grinding after turning
Centerless grinding holds diameters tighter than turning alone.
Secondary operations
Deburring, passivation, plating, heat treatment and marking add days and cost.
Inspection
In-process gauging, vision checks and first article reports. Ask what comes with the quote.
Typical size and tolerance
Typical ranges, not promises. See the guides on tolerances and surface finish for what moves them.
| Spec | Typical range | Note |
|---|---|---|
| Bar diameter | 1 to 32 mm | Some machines go to 38 mm. Below 1 mm is a specialist job. |
| Length to diameter | Up to 10:1 or more | The guide bushing supports the bar right next to the cut. |
| Diameter tolerance | ±0.005 to ±0.013 mm | Tighter is possible with grinding or in-process gauging. |
| Surface finish | Ra 0.4 to 0.8 µm | As turned, on free machining grades. |
| Cycle time | 15 s to a few minutes | Depends on features, material and the number of tools used. |
Materials
Swiss-type lathes cut most metals and engineering plastics supplied as round bar. The full list is in the materials guide. Grades, equivalents and bar stock tolerances are on the materials page.
| Material | What changes | Typical tolerance |
|---|---|---|
| Stainless 303 / 304 / 316L | 303 is the free machining grade for high volume. 316L for medical, food and fluid parts. | ±0.005 to ±0.013 mm on diameters |
| 17-4 PH stainless | Heat treatable. Common for instrument parts and aerospace pins. | ±0.005 to ±0.013 mm on diameters |
| Titanium Grade 5 / Grade 23 | Bone screws and dental parts. Needs sharp tools, low heat and good chip control. | ±0.008 to ±0.013 mm on diameters |
| Brass C360 | The fastest material to cut on a Swiss lathe. Contacts, fittings and inserts. | ±0.005 to ±0.01 mm on diameters |
| Aluminum 2011 / 6061 / 7075 | 2011 cuts cleanly at high volume. 6061 and 7075 need chip control on long parts. | ±0.008 to ±0.013 mm on diameters |
| PEEK, POM (Delrin) | Thin sections flex under the tool. Plastics move with heat and moisture. | ±0.025 mm is realistic |
When a Swiss-type lathe is the wrong tool
Parts with a largest diameter above the machine's bar range, flat or boxy parts and one-off pieces belong elsewhere. A conventional CNC lathe or a mill usually fits better. The comparison guide shows where the line sits. If you are not sure which side your part falls on, send the drawing and we will say so.