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How to prevent submersible pump shaft and bearing from locking

Submersible pump are widely used in a variety of applications, from residential to industrial. They are efficient and reliable but can suffer from shaft and bearing locking, which can result in costly repairs or even replacement. In this article, we will explore several ways to prevent submersible pump shaft and bearing from locking.

Regular Maintenance for Submersible Pump

submersible pump
  1. Regular maintenance is crucial to prevent submersible pumps shaft and bearing from locking. A poorly maintained pump is more prone to failure, and failure can result in severe damage.
  2. The maintenance schedule should include a visual inspection of the pump and its components, cleaning of the impeller and the volute, and lubrication of the bearings.
  3. The frequency of maintenance will depend on the pump’s usage and the manufacturer’s recommendations, but it should be at least once a year.

Proper Installation

  1. The installation process can also affect the pump’s performance and longevity. The pump should be installed correctly, following the manufacturer’s guidelines. The pump should be correctly positioned in the well or the reservoir to prevent excessive wear and tear of the components.
  2. The shaft should be aligned correctly, and the pump should be adequately supported to prevent vibration. The electrical connections should be secure and done according to the local regulations.

Avoid Dry Running

  1. Dry running is a common cause of submersible pump failure. When a pump runs dry, the impeller spins in the air, causing friction, which can lead to overheating, wear, and even damage to the bearing.
  2. To prevent dry running, submersible pumps should be equipped with protection devices such as level sensors or flow switches that will shut off the pump when the water level drops below a specific level.

Use High-Quality Parts

  1. Using high-quality parts can make a significant difference in the performance and longevity of submersible pumps. High-quality parts, such as shafts and bearings, are designed to withstand the harsh environments in which submersible pumps operate.
  2. Using low-quality parts can cause premature wear and tear, leading to shaft and bearing locking. It is essential to use OEM or high quality replacement components.

Monitor Vibration and Temperature:

Submersible pumps should be monitored for vibration and temperature regularly. Abnormal vibration indicates a misaligned or damaged shaft or bearing. High temperatures can indicate overheating, which can lead to premature wear and tear. Monitoring the temperature and vibration regularly can help prevent submersible pump failure and prolong the life of the pump.

Proper Storage:

The pump’s storage can also affect its performance and longevity. When not in use, submersible pumps should be stored in a clean, dry environment to prevent corrosion and damage. The pump should be cleaned and lubricated before storage. The shaft should be covered to prevent dirt and debris from getting into the pump.


Preventing submersible pump shaft and bearing from locking requires proper maintenance, installation, avoiding dry running, using high-quality parts, monitoring vibration and temperature, and proper storage. By following these guidelines, submersible pumps can operate efficiently and reliably for years, saving users time and money.

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