The INGERSOLL BOHLE machine underwent a significant retrofit aimed at enhancing its spindle performance and overall operational reliability. The outdated spindle drives were removed and replaced with modern inverter drives engineered for precise speed regulation and improved energy efficiency. These new drives provide smoother acceleration, better torque control, and more stable spindle operation across the machine’s entire working range. By integrating advanced inverter technology, the machine now responds more accurately to commanded speeds, reduces thermal stress on components, and experiences fewer drive-related faults. This upgrade not only increases machining consistency and productivity but also extends the machine’s service life by improving reliability and reducing maintenance requirements.