Features：
1. Saving energy by permanent magnetic holding force.
2. Much safer than electric magnetic chuck because no risk of losing electric power and electricity leakage.
3. No change of plane accuracy during the switching on or off.
4. Holding force range is from 80, 100 , 120 to 140N/cm2.
5. Parallelism of most chuck's working plane is 0.03mm/100mm, also can be up to 0.005mm/100mm for special item.