Look at the geometry before the part name
Small shafts and pins are familiar Swiss-type parts, but the name alone tells us little about the manufacturing route. Diameter, length, material, cross-features, back-working requirements and quantity all matter.
Bar-fed production can simplify repetitive work. On a guide-bush machine, supporting the stock close to the cutting zone can help with long, slender geometries. How useful that is depends on the machine arrangement and the requirements of the part.
Shafts and pins: more than diameter and length
On a stepped shaft, we need to understand how the diameters relate to one another, along with surface requirements and end details. Slender parts make support and workholding especially important. Cross-holes or flats bring live tooling and operation sequence into the discussion.
An enquiry giving only overall length and outside diameter may miss the features that determine the job. Show assembly chamfers, grooves and functional surface requirements on the drawing. “A very small pin” is not a manufacturing specification.
Bushes and fittings: internal features change the job
A bush may depend on its bore, wall thickness and the relationship between inside and outside surfaces. Thin walls can deform under cutting or clamping loads. On a fitting, internal and external threads, spanner flats and sealing faces may drive the process plan.
A connection part is not automatically suitable just because its thread looks right. Specify the thread standard, dimensions and acceptance requirements. A visual check alone cannot establish sealing performance.
When another machine may be a better fit
Not every bar component is most economical on a Swiss-type lathe. Diameter limits, heavy milling, unusual workholding or the operation mix may favour a conventional CNC lathe or mill-turn machine. At very low quantities, setup time can also change the decision.
Send the drawing, material and batch size together. A similar-looking catalogue part is a useful starting point, but it cannot replace a review of your actual requirements. Our guides to Swiss turning and mill-turn machining explain the process differences in more detail.
Related guides
- Swiss turning and mill-turn machining
- Using multi-axis Swiss lathes effectively
- How to Compare CNC Machining Quotations
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