1. it is made from the whole cast-iron, which is heavy enough and of good rigidity and stability.

2. Three gears controlled by a handle, stepless speed regulation, with lower noise and high- standard machining accuracy,is     an environmental- protective machine.
3. The spindle is the high- rotate speed and sophisticated bearing, with smooth surface. The extra size diameter of                  the spindle bore isφ72mm while the diameter of chuck is φ250mm.