Recently, a South American client contacted us to source a suitable Swiss-type lathe for manufacturing step locating ejector pins. The workpieces are made of quenched and tempered C45 carbon steel, with an overall length of 8.8 mm, maximum outer diameter of Φ4 mm, ultra-thin tip shaft of Φ2 mm, root R0.3 transition fillets and 45° lead chamfers on the ends. Strict tolerances are required for outer diameters and lengths, the mating surfaces demand a roughness of Ra3.2, and high consistency of dimensions across batches is mandatory. The client put forward stringent precision standards for machining. After technical verification by our engineers, the SL205 Swiss CNC lathe fully meets all his requirements, boasting a repeat positioning accuracy of 0.003 mm.
Micro step locating pins are core small matching components for automation equipment and tooling fixtures. When processed on conventional engine lathes or machining centers, thin shaft sections are prone to tool chatter, and repeated re-clamping across multiple processes leads to precision loss. Swiss CNC lathes effectively resolve these pain points. Equipped with rigid guide bush support and a dual-spindle synchronous turn-milling composite structure, they deliver integrated full-process mass production for such miniature shaft workpieces, featuring stable dimensional tolerances and drastically boosted processing efficiency, ideal for workshop bulk orders.
Core Advantages of SL205 Swiss CNC Lathe
| Rigid Guide Bush Support Eliminates Chatter on Thin Shafts |
| The SL205 handles bar stock up to Φ20 mm, fully covering the workpiece machining range. Bars pass through the rotary guide bush close to the cutting zone, providing full rigid support for ultra-thin Φ2 mm shafts. This eliminates bending, tool chatter and wavy surface defects common on ordinary lathes, enabling stable OD tolerance control in mass production. |
| Dual-Spindle Synchronous Machining – Front & Back Profiles Completed in One Clamping |
| Main and sub-spindles run synchronously up to 10,000 rpm. End chamfering, face drilling and backside contour forming are finished in a single feed cycle, with no manual flipping or re-alignment required. It eliminates positioning errors from multiple re-clamping, reliably securing precision of tiny radii, step coaxiality and straightness. |
| High-Rigidity Stress-Relieved Bed Maintains Consistent Precision for Long Mass Production |
| The stress-relieved cast machine bed delivers spindle radial runout ≤0.002 mm and repeat positioning accuracy ≤0.003 mm, with zero dimensional drift during prolonged continuous operation. |
| Standard Mechanical Lever Type Part-Off Tool Detection Device |
| Monitors tool wear in real time and accurately controls overall workpiece length, avoiding reject parts with inconsistent lengths and drastically cutting mass rework rates. |
The following are the specific technical specifications for the SL205 CNC Swiss-type lathe
| Item | SL205 | |
| Max. bar machining diameter | Φ20 mm | |
| Spindle bore diameter | Φ25 mm | |
| Max. workpiece machining length | Without guide bush | 2.5D (Max. 50 mm) 180 mm per single feed |
| Rotary guide bush | ||
| Max. spindle speed | 10000 r/min | |
| Rotary guide bush：
8000 r/min |
||
| Spindle motor power | 3.7 kW | |
| Spindle indexing | C-axis function (continuous indexing) | |
| Max. back spindle speed | 10000 r/min | |
| Back spindle motor power | 3.1 kW | |
| Back spindle indexing | C-axis function (continuous indexing) | |
The core machining challenges of micro step locating pins lie in anti-chatter machining for slender shafts, coaxiality control of multiple features, and consistent dimensional accuracy across batches. Equipped with exclusive hardware including rigid rotary guide bush support, dual-spindle synchronous turn-milling system and mechanical part-off tool detection device, the ANTISHICNC SL205 dual-spindle Swiss lathe completes full-process machining of both workpieces on a single machine. It thoroughly overcomes the drawbacks of conventional lathes and milling machines, making it the optimal mass-production equipment for automation hardware and precision shaft components for foreign trade.
Shanghai ANTISHICNC provides mature export-oriented technical support for Swiss lathes. We offer full-process customized services for miniature shaft parts, including dedicated process debugging, tool selection and sample testing. Clients worldwide are welcome to inquire and place orders. Email: contact@antsmachine.com