A rounded edge is free from burs, has no secondary burs and is therefore better protected against wear. Parts with rounded edges will slide easier and have a lot less friction. One example of this is the clip on a car seatbelt. Rounded edges also reduce the risk of injury and damage on contacting materials.
Centrifugal disc finishing units are best suited to rounding edges on small and medium-sized workpieces, as this process requires a high degree of abrasive power. These systems are up to 10 times more effective than circular vibrators.