Air-Powered Spindles Enable 50,000-rpm Milling

Eastec 2017: Air Turbine Spindles’ new 50,000-rpm 660 series is said to dramatically reduce cycle time and machine spindle wear in applications ranging from micromachining to heavy-duty milling in tool steel, titanium, ceramics or Inconel.

Air Turbine Spindles’ new 50,000-rpm 660 series is said to dramatically reduce cycle time and machine spindle wear in applications ranging from micromachining to heavy-duty milling in tool steel, titanium, ceramics or Inconel. Constant speed is maintained at 50,000 rpm, with power ranging to 0.94 hp, in order to achieve true trochoidal programming at high speed. For more power, the company offers the 1.60-hp, double-turbine 660X, which keeps speed close to rated 50,000 rpm to optimize cutting tool performance and surface quality.

These spindles have only two moving parts: the turbine and the quadruple air-cooled angular contact bearings. The resulting lack of heat and vibration enables operators to mill, drill or finish faster and more cleanly with no duty cycle or maintenance for 1,000 hours, the company says. The spindles connect to 90-psi dry, clean air to mill with accuracy of 2 microns. 

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