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Cleaning Commutator and Slip Ring Surfaces with a Brush

  • April 2025
  • Number of views: 607
Article

When there is a need for cleaning the contact surfaces of commutators and slip rings with brushes, emery cloth with aluminum oxide is NOT recommended, as conductive abrasive particles will cause arcing and damage to the surface. Many times, stone cleaning, garnet paper and machining are not a convenient, sufficient, or cost-effective option for machines as the priority is to keep the downtime to a minimum. This is when the carbon brush can be designed to clean up the contact surface.

Limpiando las superficies de los colectores y anillos rozantes con escobillas

  • April 2025
  • Number of views: 234
Article

Cuando sea necesario limpiar las superficies de contacto de los colectores y anillos rozantes, NO se recomienda usar tela de esmeril con óxido de aluminio, ya que las partículas abrasivas conductoras pueden causar arcos eléctricos y dañar la superficie. Muchas veces, la limpieza con piedra, el papel granate (Garnett) y el mecanizado no son una opción conveniente, suficiente ni rentable para las máquinas, ya que la prioridad es minimizar el tiempo de parada. En este caso, la escobilla de carbón se puede diseñar para limpiar la superficie de contacto.

Lubricating an Open Ball Bearing During Assembly of an Induction Motor

  • January 2025
  • Number of views: 3211
Video

This video shows the proper way to lubricate the deep-groove, open ball bearing before assembling a horizontal induction motor.

Seating Carbon Brushes on a DC Machine

  • January 2025
  • Number of views: 1912
Video

This video shows the proper procedure for seating carbon brushes in a DC machine.

Testing Interpole Polarity on a DC Machine

  • January 2025
  • Number of views: 2729
Video

This video will walk you through how to check the relative polarity of DC machine interpoles and the armature and correct it if necessary using a simple interpole polarity test.

Using an Induction Heater to Install Interference-Fit Bearings

  • January 2025
  • Number of views: 2484
Video

This video demonstrates the correct way to use an induction bearing heater to install an interference fit ball bearing on a machine shaft.

Brush Stagger to Optimize Brush Life Through Current Density

  • January 2025
  • Number of views: 1847
Article

When working with DC machines, it’s not uncommon to find a customer who runs different products requiring a range of armature current. Unlike other conductors, where lower current is a good thing, carbon brushes are designed for a narrow range of current density. A unique aspect of carbon brush life is that brushes operating at a much lower current density than they are designed for do not last nearly as long as expected.

Desalineamiento de escobillas para optimizar su Vida útil através de la Densidad de Corriente

  • January 2025
  • Number of views: 1202
Article

Al trabajar con máquinas de CC, no es raro encontrar un cliente que fabrica diferentes productos que requieren un rango de corriente de armadura. A diferencia de otros conductores, donde una corriente más baja es algo bueno, las escobillas de carbón están diseñadas con poco margen de densidad de corriente.

Rewind 2024

  • July 2024
  • Number of views: 4151
Convention presentation

Revisit EASA's 2024 Convention & Solutions Expo by buying access to recordings of the general sessions and education events streamed from EASA's website! These recordings provide just over 32 hours of training. Downloadable PDFs of slides and technical papers are included!

Cómo efectuar una "prueba de impacto" para resonancia

  • July 2024
  • Number of views: 2601
Article

Cuando la resonancia causa una vibración excesiva, es importante identificar la frecuencia natural y la forma modal de la vibración. Una simple prueba de impacto (bump test), realizada a máquina parada, es un buen primer paso para identificar la frecuencia natural.