Air Turbine Technology, a leading manufacturer of governed constant high-speed turbine spindles, is highlighting its drill tap series of high-speed pneumatic spindles, engineered to help manufacturers dramatically increase production, extend tool life and improve surface finish quality on compact drill-tap machining centers.
The drill tap series is a quick and easy add to the magazine of popular machines including Robodrill, Brother, DN Solutions and Haas. With no heat and a governed constant speed up to 90,000rpm, the drill tap series uses only a dry 90 psi air supply, with no wires, additional drives, converters or lubrication systems required.
The drill tap series accelerates production in high-speed milling, micro-drilling, engraving, slotting, and finishing operations with small tools, where maintaining constant SFM in cut under load is critical to tool performance and part quality. Consistent high speed under load improves chip formation and reduces cutting forces, which contributes to longer tool life, more predictable tool performance, and better dimensional control through long production runs.
Air Turbine Tools’ patented governed turbine technology increases CFM air flow volume to respond reactively to cutting load, keeping tool rotation close to rated speeds at 30,000, 40,000, 50,000, 65,000,and 90,000rpm. These direct drive spindles therefore sustain torque under cutting load unlike spindles that fade as soon as the tool engages. In addition, these tools operate without vibrating gears or vanes or high-frequency brushes that wear and generate heat in conventional spindle designs.
With only two moving parts and low-friction, air-cooled bearings, the drill tap series spindles run with no heat or thermal growth and very low vibration to affect 2µm precision which supports continuous 24/7 operation with no duty cycle and no maintenance requirements. This is especially valuable for unattended and lights-out production.
The drill tap series includes compact single-turbine and powerful double-turbine configurations to match different material and tooling demands. Single-turbine drill tap models, such as the 625DT, deliver fixed governed speeds from 30,000 to 65,000rpm with power ratings up to 0.55 hp (0.41 kW), providing an efficient solution for precision milling, micro-drilling, and finishing with small-diameter tools while maintaining excellent surface finish and tight tolerances. For harder materials, larger tools, or higher metal removal rates, double-turbine variant 0.8HP 50,000rpm 625XDT provides higher power output, enabling accelerated feed rates and high-speed strategies such as trochoidal milling without sacrificing stability or accuracy.
These US manufactured drill tap series spindles are available in BT/DIN/CAT 30/40 formats with seven day shipping. Users can automatically load the tools using Air Turbine Tools’ patented spindle-mounted arm and manifold block, or in some cases using air through the machine spindle. The drill tap series therefore has flexible uses across multiple machines or setups without significant mechanical modifications or complex plumbing or wiring.
Whether engraving metals, milling hexalobe screws or drilling silicone waifers, the business impact of the drill tap series at 50,000 and 65,000rpm is realised in faster cycle times and higher-quality finishes as extended cutting tool life. By transferring high-speed machining tasks away from the main machine spindle to the auxiliary air turbine spindle, shops can reduce wear on their main spindle and avoid the cost and downtime associated with frequent rebuilds, while simultaneously increasing feed rates and shortening cycle times on small-feature machining. The oil-free operation, elimination of mist lubrication, and 2µm accuracy of the DT Series further support cleaner, more stable processes that align with modern lean and automated manufacturing environments.