Commutator Undercutting Overview
Commutator undercutting is performed to undercut the mica separating the copper segments so that the copper bars will wear evenly. In instances, the mica is hard and does not wear down evenly with the copper segments. After deterioration from external mechanical or electrical causes has been located, the commutator undercutting is performed.
The U.S. Navy has approved this process for all of its DC armatures.
Benefits
- Minimizes Burrs
- Faster and More Efficient
- Helps Ensure Even Wear on Copper Bars
Process
Automated undercutting provides for a quicker and more accurate job. The floating head and power feed ensures the cutting wheel follows the mica and minimizes burrs. A de-burring attachment removes burrs and rounds the corners of the newly cut bar. The commutator is then stoned and polished to be sure all particles of excess copper are removed.
Media and Links
Bradleys' Commutator Undercutting Information