Hass BT 40 Spindles

Many Haas machines feature a dual-winding motor – wye and delta – with an electronic switch to change between the two windings. By selecting the best winding for low-rpm cutting and the best winding for high-rpm cutting, we provide higher torque over a wider rpm range. And our on-the-fly wye/delta switching maximizes acceleration/deceleration rates for more chip making and less waiting.
The Haas high-performance spindle is synchronized with the machine’s Z-axis motion to provide synchronized tapping. This eliminates the need for expensive floating tap holders, and prevents lead-thread distortion and start-thread pullout. The tap can retract up to nine times faster than it went in to reduce cycle times, and an automated tap recovery feature can easily back the tap out of a hole in the event of an interruption. (Standard on all machines except GR, Mini Mill, Toolroom Mill, and Toolroom Lathe.)
The Haas-designed vector spindle drive uses closed-loop, digital servo technology to provide precise speed control and peak performance under heavy cutting loads, resulting in the fastest, most powerful spindles ever. Our vector drives allow you to push the spindle to 150 percent of the motor’s continuous power rating for 15 minutes, and to 200 percent for 3 minutes. That’s more performance headroom than most other drives on the market.