Mazak Ultra Narrow UN Series Vertical and Horizontal Machining Centers Mazak UN Series provide a unique ultra narrow design that makes it 3-4 times more productive per unit of floor space than normal-sized machines. These units can be stacked together for mass production applications. A high speed spindle can accelerate to top speed in just 0.55 seconds, and perform synchronized tapping up to 8000 rpm. The UN-600V has a large machining envelope, comparable to a #40 machining center. Maintenance panels are large and conveniently located. 20,000 rpm spindle Narrow footprint - several can be stacked in a row Large maintenance panel with easy access Multiple machines may be tended by one robot