Machining difficult-to-cut materials such as titanium (Grade 5), Inconel, or high-strength stainless steel is a daily occurrence in the aviation and energy technology sectors. These materials tend to vibrate with unstable clamping, resulting in chatter marks on the surface and premature tool wear. The pL LEHMANN rotary tables are characterised by exceptional bearing rigidity and high clamping torques of up to 7,000 Nm.
This mechanical robustness allows for more aggressive selection of cutting parameters (speed, feed, and depth of cut) without compromising dimensional accuracy. This stability is particularly crucial for 5-axis complete machining of turbine blades or housing components, ensuring that the required tolerances of up to ±0.002 mm (size-dependent) are reliably and consistently met. The combination of the backlash-free PGD gearbox and powerful pneumo-hydraulic clamping of the counter-bearing ensures that the workpiece remains immovably in position even under high radial loads.
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