A program view of the final part.

Air Turbine Tools® 40,000 RPM Spindle
Improves Cycle Time and Surface Finish

Air Turbine Tools® offers the 0.88 HP governed 40,000 RPM 650 CNC spindle series, designed to dramatically accelerate machining rates.

In a recent side-by-side study, AW2024/31355 aluminum was milled using both a standard Haas 8,000 RPM CNC spindle and the Air Turbine Tools® 650 spindle series, each with a ball nose tool.

Application Information

Material: AW2024/31355
Tool: Ø 3 mm
DOC: 0.126 mm
Step: 0.12 mm
Air Turbine Spindles® 650 Series
Speed: 40,000 RPM
Feed Rate: 3,640 mm/min
Cycle Time: 00:21:12
Haas Main Spindle
Speed: 8,000 RPM
Feed Rate: 728 mm/min
Cycle Time: 02:03:54

2 Hours Cut To Just 20 Minutes

The difference was striking: the contoured part machined with the 650 spindle series was completed in just 20 minutes, compared to 2 hours with the Haas CNC spindle. That’s a six-fold reduction in CNC cycle time. Beyond speed, the Air Turbine pneumatic spindle also delivered a noticeably superior surface finish, improving part quality without sacrificing throughput.

What Challenges Do Conventional CNC
Spindles Face When Milling Aluminum Alloys?

Machining aluminum alloys such as AW2024/31355 with standard CNC spindles can be both time-consuming and costly. For example, a typical 8,000 RPM spindle, commonly found in many Haas CNC machines, may take up to two hours to machine a contoured part with a ball nose tool. These extended cycle times not only reduce throughput but can also compromise surface finish quality and drive up overall production costs.

A photo of the final part.

What Makes Air Turbine Tools® Spindles
Ideal for High-Speed Machining?

Engineered for both speed and power, Air Turbine Tools® spindles deliver up to 1.4 HP while running at rotational speeds from 25,000 to 90,000 RPM. Installation is simple; just connect to 90 psi (6.2 bar) compressed air, and the high-speed spindle is ready to run. The patented governor ensures consistent airflow and maintains precise speeds, making these spindles fully compatible with automatic tool changers (ATC) on any CNC machine.

With only two moving parts, Air Turbine Spindles® run cool with no heat build-up and require minimal maintenance. Their design enables continuous 24/7 operation with no duty cycle limitations, consistently achieving micron-level accuracy of 2 microns throughout production.

Service & Support

Support is always available from our technical team in the USA and Germany. Repair Service is available in Florida and Munich. Call our factory technicians at +1-561-994-0500 or email us at [email protected].