Inside Swiss-Type CNC Machining: From Raw Material to Finished Part

Swiss-type CNC lathes are widely used for machining small-diameter, high length-to-diameter ratio parts, thanks to their ability to combine multiple operations in a single setup. From bar stock feeding to final inspection, each stage of the process plays a role in maintaining dimensional stability and surface quality. The steps below, using 1215 free-cutting steel as an example, walk through this process.

The Machining Process, Step by Step

Step One: Auto-Feeding and Precision Clamping
Bar stock is automatically fed into the machine, removing the need for repeated manual loading. The material is then precisely clamped into position, providing a stable base for the turning and milling operations that follow. Consistent clamping is essential for dimensional consistency, particularly in batch production of precision parts, since clamping accuracy has a direct effect on the yield rate of finished components.

Step Two: Simultaneous Turning and Milling
A key strength of Swiss-type machining is its ability to perform turning and milling simultaneously within a single setup. Compared with traditional step-by-step machining, this approach reduces the cumulative error that can result from repeated clamping and repositioning, while also shortening the process flow for each part — making it well suited to small-diameter, long parts.

Step Three: Precision Part Formation
Parts produced through this turning-and-milling process come out with stable dimensions and a smooth surface finish, meeting the tolerance and surface-quality requirements typical of precision components. The quality achieved at this stage has a direct bearing on whether a part meets the technical requirements of downstream assembly or end use.

Step Four: Inspection Right After Machining
Once a part comes off the machine, it undergoes a preliminary inspection — including dimensional checks — before moving to the next stage, rather than waiting for a full batch to be completed before checking. This allows deviations to be identified and addressed earlier in the process.

Taken together, these steps form a continuous flow from raw material to finished part, reflecting the level of automation, process integration, and in-process quality control involved in Swiss-type machining.

This type of precision machining is widely applied across industries such as automotive, machinery, medical, and home appliances, where component precision matters. Our company has been in operation since 1990, bringing over 30 years of manufacturing experience. We are equipped with Japanese-imported Star Swiss-type CNC lathes, domestic CNC lathes, machining centers, grinders, cleaning machines, and other production equipment, and we specialize in custom precision and general hardware parts manufacturing.