Proper Storage of Electric Motors: Essential Tips for Longevity
Storing electric motors correctly is a critical practice that often gets overlooked. Improper storage methods can lead to serious damage, costly repairs, and reduced motor lifespan. Whether the motor is a spare or not in use for a long period, following proper storage guidelines ensures it remains in optimal condition and ready for operation when needed.
This guide provides essential tips and best practices for storing electric motors to protect them from environmental factors and potential defects.
Best Practices for Electric Motor Storage
1. Choose the Right Storage Location
- High and Dry Area: Store motors in elevated spaces to avoid water damage from unexpected disasters like floods.
- Well-Ventilated Room: Ensure proper air circulation by installing exhaust fans to prevent humidity buildup.
- Protection from Sunlight and Chemicals: Avoid direct exposure to sunlight, dust, corrosive chemicals, or hazardous atmospheres.
- Distance from Heat Sources: Do not store motors near boilers, steam machines, or freezers to avoid thermal stress.
2. Minimize Vibrations and Moisture
- Stable Base: Place motors on pallets to prevent direct contact with the floor and reduce the risk of moisture damage.
- Use Absorbents: Add silica gel or other moisture-absorbing agents to combat humidity.
Preventing Moisture and Rust
Rust is a significant concern for stored motors, as it can compromise the integrity of metal components. Moisture is the primary cause of rust, so proactive measures are essential.
1. Maintain Optimal Humidity Levels
- Use a dehumidifier to keep room humidity between 45% and 55%.
- Maintain the motor’s temperature at least 3°C above the dew point to prevent condensation.
2. Employ Space Heaters
- If the motor is equipped with space heaters, energize them to keep the motor and windings warm.
- Alternatively, use incandescent light bulbs as a heat source. Ensure the bulbs are placed at a safe distance to avoid creating concentrated hot spots.
Storage Checklist
- ✅ High and dry storage area.
- ✅ Ventilated space with controlled humidity.
- ✅ Pallets or elevated surfaces for motor placement.
- ✅ Silica gel or similar moisture-absorbing agents.
- ✅ No direct sunlight or exposure to chemicals.
- ✅ Heated environment to prevent condensation.
By following these practices, you can preserve the quality and performance of your electric motors during storage. Regular inspections and preventive measures ensure that your motors remain in peak condition, ready for operation when needed. Proper storage isn’t just about avoiding defects—it’s a cost-saving measure that extends the lifespan of your equipment.
I did not have information useful throughout my career thank you very much
How about rotating the shaft step by step once a month to prevent bearing damage.
Can u explain bearing damage from what aspect?
My opinion is it not necessary :D
If shaft is stationary for a long period the grease/oil will become dry and difficult to rotate later. Bearing manufacturers will give a correct reply if you contact them.
Yes you need to rotate every 2-3 months as a general rule.
It has nothing to do with grease hardening. The damage cause is called False Brinelling.
It is due to metal to metal contact after the grease is pushed out by gravity.
If you want more information Look-up False Brinelling bearing damage.
This is a well known problem and a serious one in larger motors.
Other observations listed here are good but should also place oxidation protection on the motor shafts and keyways to prevent rust. Do Not Shrink Wrap! Thai is only for shipping and short term… Never warehouse this way.