Maintenance intervals depend on the motor type, power and operating conditions. In general, bearing lubrication, checks of the electrical connections and terminal box, cleaning of the housing and vibration monitoring should be carried out every 6–12 months. In dusty, humid or hot environments, this interval should be shortened.

Periodic checklist

  • Visual inspection: remove dust, oil and dirt from the fan cover, cooling fins and housing; nothing should obstruct the airflow.
  • Bearings: monitor noise, temperature and vibration. On motors with grease nipples, add the type and amount of grease stated on the plate or in the catalogue; sealed, lubricated-for-life bearings are not regreased but replaced when necessary.
  • Electrical connections: check terminal tightness, cable insulation, and the sealing of gaskets and cable glands.
  • Insulation resistance: measure the winding insulation with a megohmmeter on motors that have been idle for a long time or work in damp areas.
  • Current and voltage: confirm that phase currents are balanced and within the nameplate values.

Too much or too little grease

Bearing failures are among the most frequent causes of electric motor breakdowns. Insufficient lubrication leads to wear, while excess grease makes the bearing run hot. Rather than assuming "more is better", follow the specified interval and quantity, and never mix different grease types.

The value of predictive maintenance

Vibration measurement (assessed to ISO 10816 / ISO 20816), thermal imaging and current analysis help detect problems before they turn into failures. Regular maintenance extends motor life and prevents unexpected stoppages, and high-efficiency, quality motors require less maintenance, lowering the total cost of ownership.

For a maintenance plan or replacement needs, contact us on +90 (542) 666 11 11 (WhatsApp) or at info@drgmotor.com.