Programmable Power Chuck

The Pratt Burnerd Programmable Power Chuck (PPC) is equipped with a high ratio gearbox, which enables it to operate at high spindle speeds (up to 5,000 rpm) and low torque. It is also faster to actuate than the prototype, minimizing setup times, according to the company. The PPC provides reduced setup and change-over times.

The Pratt Burnerd Programmable Power Chuck (PPC) is equipped with a high ratio gearbox, which enables it to operate at high spindle speeds (up to 5,000 rpm) and low torque. It is also faster to actuate than the prototype, minimizing setup times, according to the company.

The PPC provides reduced setup and change-over times. It has both high accuracy and repeatability. Based on a traditional scroll chuck design, it has a much wider jaw movement than a normal power chuck, up to 50 mm compared with only about 5 mm. Unlike conventional power chucks, the PPC is fully integrated and programmable through the lathe's controller and does not depend on a hydraulic cylinder. This eliminates the problems associated with a hydraulic system, such as the power consumption (often as much as 3 kW), which effectively reduces spindle torque and power, the inaccuracies caused by the temperature gradient created along the spindle and the reduced cycle times because of hydraulic inertia, according to the company. It also reduces the space required. A quick-jaw change is standard.