Mitsui's surface grinder employs a ball guide system of smooth operation. It is generally said that a ball guide system is not suitable to mirror finishing because of its poor rigidity. However, our endeavor to make component parts more accurate and rigid produces a mirror surface equivalent to that produced by other guide systems.

	Typical machining data
		Work: SKD-11
		Grindstone: Diamond
		Peripheral speed of grindstone: 800m/min
		Table speed: 9m/min
		Feed speed: 40mm/min
		Machining accuracy: Rmax 0.1μm

Data measured