420 (410) Series Fine Boring Heads
As the world's smallest digital fine boring tool with a peripheral cutting edge, the unbalanced 420 (410) series has a diameter range of 0.787 inches – 1.142 inches (20.00 millimeters – 29.00 millimeters). The 465 (464) boring heads offer automatic self-balancing and bore diameters from 1.142 inches – 8.071 inches (29.00 millimeters – 205.00 millimeters). These boring heads have a special design to minimize the residual imbalance produced by insert holder displacement.