(08) 9302 7800

Fiberglass manufacturing plant reduces motor bearing failure


A fiberglass manufacturing plant was experiencing short bearing life of the fan motors. The motors were lubricated weekly with a Lithium Complex based Electric Motor Grease (EMG) per OEM recommendation. The amount and frequency were
not defined and often depended on the experience of each technician.

The vibration monitoring revealed occurrence of heavy bearing vibrations. The temperature of the bearings could reach up to 45ºC to 65ºC. The maintenance cost for each fan motor reached up to $4,000 per year.

The objective was to improve the reliability of the bearings and extend the Mean Time Between Failure (MTBF) of the equipment.

Products featured in this case study:

Chesterton 638 EMG


The Chesterton® specialist measured the bearing temperature and calculated the speed factor or NDm of 430,000. He recommended a correct grease of Chesterton 638 EMG 46 #2 with the base oil viscosity of 46 cSt and a correct greasing
quantity of 0.6 gm/day using the Chesterton Precision Lubrication Tool (PLT). 

A Lubri-Cup EM-500 was selected and programed for 12 months.

Chesterton 638 EMG 46 #2 is designed specifically for high-speed electric motor bearings. QBT technology of the grease reduces wear and vibrations extending the bearing life.

Ventilation fan motors operating at 3600 RPM.

Chesterton 638 EMG 46 #2 chosen due to high-speed motor.

Monitoring vibrations validate Chesterton 638 EMG 46 #2 performance.


The anti-wear and extreme-pressure additives in Chesterton 638 EMG 46 #2, immediately helped reduce the vibrations by 20% compared to that by the previous grease. After 15 days, vibrations reduced further by 66% when measured by acceleration. Furthermore, the reliable grease performance reduced the operating temperature of the bearing by 25ºC, increasing the life of the grease and bearing. After the success from one motor, the solution was implemented on 14 fan motors (28 bearings, 14 Lubri-Cups and, 7 kg of Chesterton 638 EMG 46 #2 grease).

About Us

Chesterton® is a world leader in helping process industry companies and manufacturers improve the reliability and efficiency of their rotating, stationary, and fluid power equipment platforms. We are known across a wide range of industries for our award-winning pump and valve sealing solutions, applications expertise, equipment maintenance and wear-prevention products, and knowledgeable hands-on local service. Chesterton product range includes mechanical seals, packing and gaskets, industrial lubricants and coatings.

® Registered trademark owned by A.W. Chesterton Company

Issued 06/2022. EN600827

Technical data reflects results of laboratory tests and is intended to indicate general characteristics only. A.W. Chesterton Company disclaims all warranties expressed or implied, including warranties of merchantability and fitness for a particular purpose. Liability, if any, is limited to product replacement only. Any images contained herein are for general illustrative or aesthetic purposes only and are not intended to convey any instructional, safety, handling, or usage information or advice respecting any product or equipment. Please refer to relevant Safety Data Sheets, Product Data Sheets, and/or Product Labels for safe use, storage, handling, and disposal of products, or consult with your local Chesterton sales representative.

Back to Case Studies

We are here to help - Contact Us

Contact Us