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The Ultimate Guide to CNC Machining: From Equipment Selection to Process Optimization

Comprehensive Guide to Swiss-Type Lathes: Equipment Selection, Tooling Configuration, and Cutting Parameter Optimization for Efficient Precision Shaft Machining

2026-08-117 minutes

1. What is a Swiss-type lathe?

Swiss-type lathe, also known as Swiss lathe or sliding headstock lathe, is a high-precision, high-efficiency CNC turning machine:

  • How it works: Material is supported by a guide bush, and the tool moves along the Z-axis for machining.
  • Key AdvantagesGuide bush support reduces material deformation, ideal for slender shafts.
  • Machining precisionTolerance up to ±0.005mm, surface roughness Ra below 0.4
  • Use Cases: Precision shafts, small-diameter parts, and complex multi-process components

II. Turret Lathe vs. Engine Lathe

Key differences between Swiss-type lathes and conventional CNC turning machines:

  • Overthinking: Workpiece moves, tool fixed, guide bushing provides support; ideal for slender shafts.
  • CNC Machine: Tool moves, workpiece fixed, chuck clamping; ideal for short, stocky parts
  • Accuracy Comparison: CNC machining offers higher precision, ideal for precision components.
  • Efficiency Comparison: The automated machine completes multiple operations in a single run for higher efficiency.

3. Swiss-type Lathe Equipment Selection

When selecting a CNC machine, consider the following factors:

  • Machining Diameter: Common specifications include 12mm, 20mm, 25mm, and 32mm.
  • Axle Configuration: 5-axis, 7-axis, 9-axis; more axes mean greater functionality
  • Tool CountThe number of tool positions determines the number of operations that can be completed in a single setup.
  • Select Brand: Japanese STAR, CITIZEN, Swiss Tornos, domestic Bo Yuan, etc.

IV. Tool Configuration

Key considerations for configuring Swiss-type lathe tooling:

  • Outer turning toolRough turning, finish turning (OD)
  • Boring Bar: Bore internal holes, cut internal threads
  • Parting tool: Part cutoff, grooving
  • Drill bit: Center hole and through-hole machining
  • Tap: Internal thread machining
  • Milling cutter: Side milling, keyway machining

V. Optimization of Cutting Parameters

Swiss-type lathe machining parameters reference:

  • Spindle Speed: 3000-8000 rpm (adjust based on material)
  • Feed rate: 0.05-0.2 mm/rev
  • Cutting depth: 0.1-0.5 mm (finishing is smaller)
  • Cooling method: High-pressure coolant for thorough tool cooling

6. Process Optimization

Process measures to improve the efficiency of Swiss-type lathe machining:

  • Process consolidationTurn, mill, drill, and tap in a single setup
  • Tool path optimizationReduce empty trips and improve efficiency
  • Sync processing: Spindle and sub-spindle synchronous machining reduces cycle time.
  • Automatic loading and unloading: Equipped with an automatic feeder for unmanned operation.

7. Common Questions and Solutions

Q: What should I do if machining precision is unstable?

Inspect the guide sleeve for wear, adjust the clearance, and ensure material straightness.

Q: What if the surface roughness is poor?

Increase spindle speed, reduce feed rate, use sharp tools, and enhance cooling.

Q: What should I do if the tool life is short?

Optimize cutting parameters, use coated tools, and ensure adequate coolant.

8. Keqi Production Capacity and Thoughtful Machining Services

Corgi Production CapacityProfessional CNC machining services:

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