Swiss-Turned Parts
Small-diameter long parts turned on Swiss-type lathes, holding 0.005 mm without deflection.
Thin, long parts where a conventional lathe bends the work under the tool. On a Swiss-type the guide bushing supports the bar right at the cut, so the diameter holds over the whole length.
How we make it: Swiss CNC machining service →
3–5 weeks
500 pieces
ISO 9001:2015 · IATF 16949
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Diameter range | Ø1–Ø32 | mm |
| Diameter tolerance | ±0.005 | mm |
| Length-to-diameter | To 20:1 | ratio |
| Max length | 400 | mm |
| Surface roughness | Ra 0.4 | µm |
| Part-off burr | ≤0.03 | mm |
Available Materials
- Stainless 303
- Stainless 316L
- Steel 12L14
- Brass C360
- Titanium 6Al-4V Grade 5
- Copper C110
Typical Applications
- Connector pins
- Medical device components
- Watch and instrument parts
- Electrical contacts
- Small valve spools
Surface Finishes
- As-turned
- Tumble deburr
- Passivate
- Gold / nickel plating (outsourced)
- Anodise
- Ultrasonic clean
Industries Served
- Medical
- Telecom & 5G
- Instrumentation
- Aerospace
- Consumer Electronics
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Diameter tolerance at ±0.005 mm is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Diameter range at Ø1–Ø32 mm decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Surface finish
- Surface roughness at Ra 0.4 µm. Every step below the ordinary as-machined Ra 1.6 µm adds a finishing pass; a callout on a face nobody touches is the most common over-specification we quote.
- Material
- The first material listed, Stainless Steel 303, rates 6/10 on our machinability scale at 228 HB. On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 500 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Surface roughness tester (Mitutoyo) against the Ra callout
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Why is Swiss turning better for small long parts?
- The guide bushing stays within a few millimetres of the cut, so the bar cannot deflect. On a conventional lathe a 4 mm pin at 100 mm long bends away from the tool and comes out tapered.
- How small a feature can you hold?
- Down to Ø1 mm on the main spindle and 0.3 mm on cross-drillings, provided the depth is under about 4 times the diameter. Deeper than that the drill wanders.
Related part families
Precision Turned Components
Turned parts with live tooling - flats, cross-holes and threads in one setup, ±0.005 mm.
CNC Turned Shafts
Turned and ground shafts, pins and spindles held to 0.005 mm TIR on bearing journals.
Electromechanical Assemblies
Mechanical parts with connectors, harnesses and sensors fitted and function-tested before shipping.