Electric Motor Repair Overview


Laser Technologies has optimized the large electric motor repair process from raw material sourcing to final assembly and every step in-between. Operational efficiency is critical to every business and the key to up-time & continuity comes down to one thing: how quickly can you turn around the repair?

Why Do Motors Fail?

Certain components of motors degrade with time and operating stress. Electrical insulation weakens over time with exposure to voltage unbalance, over and under-voltage, voltage disturbances, and temperature. Extreme temperatures (hot or cold) are one of the most common risk factors in the life of an electric motor. Other factors that can lead to motor failure can include transient voltage surges or spikes, vibration, harmonic distortion, motor overload, misalignment, moisture and bearing current.

Lamination/Core Iron Damage

If it is determined that the laminations of the stator and/or rotor are damaged, an analysis should be performed to compare the cost of repairing the existing motor versus the cost of replacing it with a new motor. Understanding the lead times of repair versus new is also a key factor when making a decision.

Getting a Quote for New Laminations and/or Restacking

At Laser Technologies, we make our quoting process for new laminations as easy and quick as possible. Filling out one of our data forms with rough dimensions is really all we need. The key dimensions we look for include the outside diameter, inside diameter, width & depth of the slots, and number of slots. We understand these dimensions at time of quote may not be 100% accurate, and that is ok. We typically have quotes turned around within 24-48 hours.Laser Technologies is your source for complete turnkey reverse engineering and restacking of stator cores, rotor cores, armature cores and DC poles. For over 35 years, we have added unique value through a wide range of in-house services and state-of-the-art equipment that enable us to deliver fast turnaround to your exact specifications. Our unparalleled commitment to quality, process control and engineering results in a superior product – precisely aligned.

Motor Rebuild Process

Every new electric motor job begins with a detailed inspection. The motor is disassembled and the core is removed. Laminations are separated and detailed measurements are taken so that a new replacement lamination can be reverse engineered and prepped for manufacturing. We then laser cut all the new laminations, apply any coatings that may be required, then reassemble and weld the core. The stack is then reinserted into the motor housing, inspected, validated and then prepped for rewinding. The entire process can take anywhere from a few days to several weeks depending on the complexity of the job, the extent of the damage and the urgency of the customer’s situation.