A1: Permanent electro magnetic chuck is a new workholding applied in metal cutting process. Comparing to traditional clamping tools, it have the advantage of 5-sides workable at single clamp, less deformation, higher efficiency, clamping force exist even after power failure.
A2: Permanent electromagneitc chuck use the Neodymium magnet inside as the energy to hold metal workpieces. It’s free of power during working, except few seconds when MAG & DEMAG. While Electromagnetic chuck need continuous current to transfer into magnetic holding force. That means PEM chuck have better efficiency and accurancy and less deformation and consumptions.
| Features | PEM chuck | EM chuck | Traditional workholdings |
|---|---|---|---|
| Machining surface | 5 side at one clamp | 5 side at one clamp | 1 side at one clamp |
| Power Supply at work | No | Yes | No |
| Working Efficiency | Excellent | Good | Low |
| Accurancy | Very high | High | Low |
| Workpiece deformation | Less deformation | Few deformation | Large deformation |
| Operation | Easy & Fast | Fast | Hard and Slow |
| Tools consumption | Less consumption | Medium consumption | High consumption |
| Controled by cnc program | Yes | No | No |
A3: The Permanent Electromagnetic chuck use high performance epoxy resin to fill in the gap of poles, and could protect the surface from coolant oil and water.