Over the years, manufacturers, contractors and brush suppliers have searched for the “magic” dustless brush grade or that impossible, frictionless material. There is no magic brush grade, but you can maximize brush life and equipment performance by taking the appropriate steps:
- Check that there is proper spring pressure.
- Check for proper current density.
- Check on proper maintenance of the commutator.
- Check to be sure brushes are changed properly.
To download the Brochure, click the link below:
Helwig Carbon’s Elevator Field Guide
NOTE: Brushes of different designs or materials should not be mixed on the same unit. Brush life of 1-2 weeks or less is not a grade problem. Be sure to check that the brushes are not hanging up in the holder, neutral is set properly, the commutator is round within .002” and there are no high bars or mica, and spring pressure is 3.5-4.0 PSI.