AIR TURBINE TECHNOLOGY INC.‘s 650 Series spindles are engineered to deliver constant high speeds under load, ranging from 25,000 to 40,000 RPM with power up to 0.88 HP (0.66 kW.) Designed for versatility and reliability, the 650 Series is suited to a wide range of applications, from micro-milling to heavy-duty operations using larger tools.

The spindles excel in machining all materials, including tool steel, titanium, and ceramics, making them an optimal choice for operations that demand robust performance and precision.

The 650 Series is rigid in cut, with power rated at 0.8 HP. The developer calls the spindle “the workhorse” for its robust construction, and because it can mill while maintaining high speed with tools up to ¼ in./ 6 mm dimensionality.

For shops that require even greater power, the 650X Series features a patented, double-turbine design that delivers up to 1.4 HP (1.04 kW) and maintains constant high speed and torque for demanding operations, such as trochoidal milling in hard materials.

The 650’s patented governor developed by Air Turbine Tools® increases air flow to match the cutting load, maintaining rated speed on the tool path. This differs from nominal high-speed technologies that drop speed as soon as the tool is engaged. The 650’s governor-controlled turbine maintains a high speed rating of up to 40,000 RPM throughout the cut, optimizing both tool performance and lifespan. Now, power is not sacrificed for speed.

Adding the 650 Series to the magazine lets the machinist dramatically increase cutting rates and reduce cycle times, significantly increasing productivity and optimizing small tool performance.

Because CNC spindles wear out quickly when operated at maximum speed, machine shops can save substantial amounts on spindle repairs and avoid costly machine downtime by keeping Air Turbine Tools in their magazines for detail work.

There is another significant difference between the 650 Series and tools with gears, high-frequency brushes or vanes: the latter often overheat or burn out, resulting in downtime and costly repairs. In contrast, the 650 Series spindles operate at 40,000 RPM with just two moving parts, generating no heat and eliminating thermal growth, a critical factor in milling inaccuracy. As a result, consistent 24/7 operation without duty cycle limitations is now possible.

The 650’s grease-packed ceramic bearings are cooled by turbine air, ensuring high reliability. This spindle certifies a 2-micron TIR and uses ultra-precision ER11 collet systems as standard, ensuring high accuracy. This turbine’s design results in ultra-low vibration of less than 0.4 mm/s², which enhances accuracy, and its quiet operation at under 78dBA is appreciated.

650 Series spindles add high speed to any CNC machine and are available with all popular shank configurations, including JS, HSK, CAT, BT and DIN, and options for fully automated loading on any CNC. With the 650 Series, Air Turbine Tools® is delivering a solution for higher productivity, providing non-stop power, precision and reliability for continuous production - while achieving superior surface finishes, 6 – 10 x reduced cycle times, and increased productivity across multiple machining applications.

Learn more at www.airturbinetools.com.