Choosing the right CNC grinding machine for highest accuracy

The right machine selection determines accuracy, productivity and economy. Four criteria lead to the right CNC grinding machine:

1. According to workpiece size

For smaller workpieces, compact machines with table widths below 400 mm are suitable – they are ideal for machining small and medium parts as well as complex shapes. For large workpieces, machines with table widths of 500–600 mm or more are required, e.g. in portal design.

2. According to the required accuracy

Standardised accuracy classes (e.g. positioning accuracy of linear movement 0.04 mm/300 mm, repeatability 0.025 mm, roundness 0.035 mm) are undercut by modern machines with reserve – the factory accuracy is typically around 20% below the standard tolerances. For most workpieces a standard machine is sufficient; for the highest requirements choose a precision version.

3. According to the machining characteristics

For frame surfaces or steps of different heights, a point-to-point/straight-line control system is sufficient. For free-form surfaces, the geometry decides: two-axis coupling for flat contours, three-axis coupling for spatial surfaces. With an additional CNC dividing head or CNC rotary table (four-axis system), helical grooves and blade profiles can also be machined.

4. According to batch size and repeat frequency

Specialised machines are suitable for large series. For medium and small batches with regularly recurring orders, a CNC grinding machine pays for itself particularly quickly – once created programmes, fixtures and parameters can be stored and recalled at any time. In the long term, higher automation replaces conventional machines and noticeably relieves your employees.

Conclusion: Tell us your workpiece, accuracy requirements, geometry and batch size – we will recommend the right machine from the JM series.