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Celebrating 70 Years

May 1, 2025/in Uncategorized /by Lynn Dreisilker

A Legacy of Reliability and Expertise

In 1955, Henry Dreisilker set out to build something lasting—founded on hard work, technical precision, and a genuine commitment to keeping industries running. Seventy years later, Dreisilker Electric Motors has become a trusted name in electric motor repair, solutions, and reliability. As we celebrate our 70th anniversary, we reflect on the journey, the people, and the progress that brought us here.

A Humble Beginning

Henry and Margaret Dreisilker immigrated from Germany to the U.S. in 1953 and soon after, Henry purchased a small electric motor and appliance repair shop. With a background in electrical apprenticeship, he focused the business on industrial motor repairs—laying the groundwork for what would become Dreisilker Electric Motors, Inc.

Margaret worked alongside Henry, rewinding stators and handling bookkeeping, helping to get the business off the ground in those early years.

Henry Dreisilker behind the counter

Pioneering Motor Repair with Innovation

One of the pivotal moments in our history came when Henry discovered Thumm stripping machines in Germany—technology that allowed for safe, low-temperature stator stripping. This became the foundation of our MotorSafe Stripping Process, which avoids damaging motor cores and ensures greater repair efficiency.

Coupled with precision rewinding, in-house machining, and advanced varnishing methods such as Vacuum Pressure Impregnation and Trickle Varnish, Dreisilker set a new standard in electric motor repair.

Henry Dreisilker with MotorSafe Stripping

Built by Experts, Powered by People

At Dreisilker, our strength lies in our people. From our earliest technicians to our current-day engineers and motor experts, our team is the heart of our operation. We’ve been proud to train generations of skilled professionals—some who came with knowledge, and many who grew their expertise with us. Our employees, past and present, remain a cornerstone of our success.

large generator repair home page banner cropped

Solutions Beyond the Shop Floor

We don’t just repair motors—we solve problems. Our field service teams help customers with on-site troubleshooting, predictive maintenance, and emergency repairs that keep industries moving. Backed by decades of knowledge and engineering insight, we deliver more than service—we deliver reliability.

Field Service VFD install

Celebrating the Past. Powering the Future.

As we celebrate 70 years of business, we remain committed to delivering the quality, integrity, and innovation Dreisilker was built on. Whether it’s in the shop, in the field, or through in-stock motor and part solutions, we look forward to continuing our legacy of reliability—for the next generation and beyond.

Thank you to all who’ve been part of our journey—our employees, our customers, and our community. Here’s to 70 years of motor expertise, and many more ahead.

Expansion to Texas

March 3, 2025/in Uncategorized /by Lynn Dreisilker

We are Now Open in Carrollton, Texas!

 We’re excited to share some big news—Dreisilker has officially expanded to Texas! Our new Carrollton location is open and ready to serve businesses throughout the Dallas-Fort Worth area with motors, HVAC components, and expert support.

For nearly 70 years, Dreisilker has been a trusted name in motor solutions, delivering reliable service, extensive inventory, and deep industry expertise to contractors, facility managers, and industrial businesses. Now, we’re bringing that same commitment to Texas businesses looking for dependable motor solutions.

Carrollton Branch Manager

Our Carrollton Branch Manager and Motor Expert

Why Texas?

As industries continue to grow in Texas, so does the need for motor solutions. Our expansion to Carrollton is part of our commitment to serving businesses where they need us most. Whether you need motors, parts, or expert guidance, our team is here to help.

“Expanding into Texas is an exciting step for Dreisilker. We’re ready to bring the expertise and service that has made us a trusted name to businesses in Dallas.” – Zac Zych, VP of Sales.

With our Carrollton location, customers can expect quick access to inventory, expert advice, and the same level of customer-focused service that has defined Dreisilker for decades.

“Texas has a thriving industrial and commercial market, and we’re proud to bring our decades of experience to support local businesses. Our Carrollton location reflects our commitment to growth, customer service, and providing the best motor solutions in the industry.” – Leo Dreisilker, President

Visit Us in Carrollton

We’re officially open for business, and we look forward to working with you! Whether you’re looking for motors, HVAC components, or expert support, Dreisilker is here to keep your operations running smoothly.

 

Dreisilker Electric Motors

2120 Hutton Dr, Ste 200

Carrollton, Tx 75006

p: 972.635.5293

Dreisilker.com/carrollton

Thank you for being part of this exciting new chapter with us!

Environmental Impact of the Burnout Oven Electric Motor Repair Process

June 5, 2024/in Efficiency, Electric Motors, Motor Repair, Uncategorized /by Lynn Dreisilker

It is increasingly important to understand how our decisions impact the environment and energy consumption in every day life. These decisions are also important for when you are selecting your electric motor repair partner. Understanding the different methods of electric motor repair and how they impact your electric motor’s efficiency and reliability are crucial. In this article, we will walk you through how the burnout oven electric motor repair process impacts your motors and review how Dreisilker’s MotorSafe Repair method differs.

What is the burnout oven electric motor repair process?

The burnout stripping method is a long-established technique utilized in the repair of electric motors to remove insulation and varnish from stator windings in preparation for rewinding. This process involves placing the stator in a specialized oven set to a high temperature, typically around 650°F, for an extended period, often exceeding eight hours. The intense heat effectively turns the insulation and varnish materials on the windings into ash, facilitating their complete removal. While this method is highly effective in preparing the stator for the application of new windings, it carries potential risks and challenges. These include possible damage to the stator core and frame from excessive heat, environmental concerns due to the release of gasses and byproducts, significant energy consumption, and the generation of waste materials that require proper disposal.

100HP After Burnout Oven

A 100HP Motor after the Burnout Process

How core integrity impacts electric motor efficiency:

The core of an electric motor plays a fundamental role in its operation, serving as the foundation for the stator windings and providing the magnetic circuit necessary for converting electrical energy into mechanical motion. Core integrity is paramount in ensuring the motor’s reliability, efficiency, and longevity. The core, typically made of stacked laminations of electrical steel, must maintain its structural integrity to support the magnetic flux generated during motor operation. Any damage or distortion to the core, whether from improper stripping methods or other factors, can compromise the motor’s performance. Issues with the core can lead to increased core losses, reduced power output, limited lifespan, and decreased overall efficiency.

To maintain optimal motor performance, core loss testing is a critical aspect of electric motor repair and maintenance. This process involves assessing the core losses in the stator core to evaluate the motor’s efficiency and performance. By measuring core losses, which include hysteresis and eddy current losses within the core material, technicians can identify any abnormalities or damage that may have occurred during the repair process, such as stripping and rewinding. Core loss testing ensures that the motor operates within optimal efficiency levels and can detect issues like core overheating, insulation breakdown, or structural damage. Conducting thorough core loss testing as part of the repair procedure allows technicians to verify the integrity of the stator core and make informed decisions regarding any necessary corrective actions to maintain the motor’s efficiency and longevity.

Considerations for use of the burnout oven motor repair process:

One of the critical factors affecting core integrity during the burnout oven process is temperature control. Excessive temperatures can lead to thermal stress and damage to the stator core and frame. It is essential to adhere to recommended temperature settings (around 650°F) and duration to prevent overheating and potential core damage. If you are working with a repair shop that utilizes the burnout method, it is important to inquire about their quality procedures for temperature control. Through our many years of experience, we have found that many repair shops may ignore the 650°F guideline and increase the temperature to expedite the process. While this might speed up the turnaround time, it can also negatively impact the motor’s efficiency.

Another significant consideration is the potential for core distortion and hot spots within the motor. Core distortion, often caused by uneven heating or excessive temperatures during the burnout process, can lead to misalignment of laminations and structural irregularities within the core material. This disruption of the magnetic circuit essential for motor operation results in increased core losses and reduced magnetic efficiency. Additionally, hot spots—localized areas of overheating—can further exacerbate efficiency issues by causing thermal stress, insulation breakdown, and potential damage to the core material. These inefficiencies lead to energy losses, decreased power output, and compromised reliability. Therefore, careful management of the burnout stripping process is crucial to minimize these risks and ensure optimal motor performance.

Alternatives to the burnout oven:

Recognizing the challenges and environmental concerns associated with the burnout oven method, we at Dreisilker have developed an alternative solution known as the MotorSafe Repair process. In a comprehensive study, we compared the burnout oven method with our MotorSafe approach, highlighting the significant advantages of our method in terms of both performance and environmental impact. Read more on the study here: MotorSafe vs Burnout Method Comparison

The MotorSafe Repair process prioritizes the protection of core integrity, minimizes energy consumption, and reduces the release of harmful emissions. In the following sections, we will delve into the specifics of the MotorSafe Repair process, discuss our study’s findings, and explore the environmental benefits that make MotorSafe a superior choice for electric motor repair. Additionally, we will refer to an article that further explains how the MotorSafe method positively impacts the environment, underscoring our commitment to sustainability and efficiency in motor repair.

MotorSafe lamintions vs Burnout Oven laminations

Laminations after the MotorSafe Repair Method (left) vs the Burnout Oven Method (right)

Crucial Wear Parts for Vacuum Pumps

March 12, 2024/in Electric Motors, Uncategorized /by Lynn Dreisilker

In industrial machinery, timely access to wear parts is crucial for vacuum pumps. This rings especially true for side channel and radial vein vacuum blowers. Join us as we explore the challenges of obtaining these parts and discover practical solutions for smoother procurement processes.

Side Channel Vacuum Blower Common Part Failures

When it comes to side channel blowers, two common parts often face lengthy lead times for replacements: casted aluminum blower wheels and filters. The casted aluminum blower wheels, essential for generating airflow within the blower, are prone to wear and tear over time. However, their intricate design and material requirements contribute to extended procurement periods. Similarly, filters play a crucial role in maintaining air quality and preventing debris from entering the system. Yet, sourcing replacements for these filters can prove challenging due to their specific dimensions and filtration capabilities. Addressing these common part failures requires proactive planning and alternative sourcing strategies to minimize downtime and ensure continued operation of side channel blowers.

Casted Aluminum Blower Wheel

Testing a Vacuum Pump

Radial Vein Vacuum Pump Common Part Failures

Radial vein vacuum pumps have several critical components that often encounter prolonged lead times for replacements, causing disruptions in operations. Among these, carbon veins stand out as a common culprit. These veins, integral for creating vacuum pressure within the pump, undergo significant stress during operation, leading to wear and degradation over time. Consequently, sourcing suitable replacements with precise specifications and material requirements can pose a considerable challenge, contributing to extended lead times. Additionally, specialized seals play a vital role in maintaining the pump’s efficiency and preventing leakage. However, their unique design and material composition often lead to delays in procurement. Furthermore, pump end plates, essential for enclosing and supporting internal components, are susceptible to wear and damage, necessitating timely replacements. Given the critical nature of these components, proactive measures such as inventory management and alternative sourcing strategies are essential to mitigate the impact of long lead times and ensure uninterrupted operation of radial vein vacuum pumps.

Vacuum Pump Parts Stocking Program  

Dreisilker offers a comprehensive Stocking Program designed to streamline the procurement process for common or critical vacuum pump components. With their expertise, they can assist in auditing or reviewing your inventory to ensure that essential parts are readily available when needed. By stocking these parts, Dreisilker significantly reduces lead times, potentially shortening them by months and minimizing downtime for your operations. Moreover, in emergency situations, Dreisilker excels in providing swift turnaround times, ensuring that your vacuum pump systems are back up and running with minimal delay. With Dreisilker’s stocking program, you can rely on their proactive approach to inventory management and responsive service to keep your operations running smoothly and efficiently.

Vacuum Pump Motor Brands We Service:

  • Becker Vacuum Pump Motors
  • Busch Vacuum Pump Motors
  • Gardner Denver Vacuum Pump Motors
  • Rietschle Vacuum Pump Motors
  • and More

Understanding NEMA and IEC Standards for Electric Motors

March 1, 2024/in Electric Motors, Uncategorized /by Lynn Dreisilker

Electric motors are the workhorses of countless industries and households, powering everything from industrial machinery to household appliances. To ensure reliability, safety, and interoperability, standards have been established by organizations like the National Electrical Manufacturers Association (NEMA) and the International Electrotechnical Commission (IEC). Let’s delve into these standards and understand their significance in the realm of electric motors.

NEMA Standards

What is NEMA?

NEMA is a trade association representing the interests of electrical equipment manufacturers in the United States. It sets standards for various electrical products, including electric motors. Find the NEMA standards for electric motors here.

Importance of NEMA Standards:

NEMA standards provide guidelines for motor design, performance, and testing, ensuring consistency and quality across the industry. These standards cover aspects such as motor dimensions, mounting configurations, enclosure types, and performance characteristics.

Impact on Electric Motors:

  1. Enclosure Types: NEMA specifies various enclosure types (such as open drip-proof, totally enclosed fan-cooled, etc.), which dictate the motor’s protection against environmental factors like dust, moisture, and corrosive substances.
  2. Mounting Configurations: NEMA standards define mounting arrangements for motors, facilitating compatibility with different types of machinery and equipment.
  3. Performance Ratings: NEMA provides performance classifications based on horsepower, speed, and efficiency, aiding consumers in selecting the right motor for their applications.
  4. Efficiency Considerations: NEMA standards also address energy efficiency, with classifications like NEMA Premium Efficiency, which indicates motors that meet or exceed stringent efficiency requirements, helping users reduce energy consumption and operational costs.

IEC Standards

What is IEC?

The International Electrotechnical Commission is a global organization that develops and publishes international standards for electrical technologies.

Importance of IEC Standards:

IEC standards promote uniformity and compatibility in electrical systems worldwide. They provide a common framework for manufacturers, regulators, and consumers, facilitating trade and technological advancement.

Impact on Electric Motors:

  1. Global Compatibility: IEC standards are recognized internationally, ensuring that motors manufactured according to these standards can be used across different regions without compatibility issues.
  2. Technical Specifications: IEC standards cover motor design, performance, and testing procedures, similar to NEMA standards, but with some variations in terminology and methodology.
  3. Efficiency Regulations: IEC has its efficiency classification system, such as IE (International Efficiency) ratings, which categorize motors based on their energy efficiency levels.

Harmonization with NEMA:

While NEMA and IEC standards have some differences, efforts are made to harmonize them where possible to minimize trade barriers and promote global interoperability in the electric motor industry.

Importance for Industry and Efficiencies

  1. Quality Assurance: Both NEMA and IEC standards provide benchmarks for motor quality, reliability, and performance, giving consumers confidence in the products they purchase.
  2. Interoperability: Standardization facilitates interchangeability of motors and components, streamlining manufacturing processes and reducing lead times for equipment installation and maintenance.
  3. Energy Efficiency: With the focus on efficiency ratings, standards drive the development and adoption of energy-efficient motor technologies, contributing to sustainability efforts and cost savings for users.
  4. Regulatory Compliance: Adhering to NEMA and IEC standards ensures compliance with regulatory requirements, avoiding potential legal and safety issues associated with non-compliant products.

In conclusion, NEMA and IEC standards play pivotal roles in shaping the electric motor industry, guiding design, manufacturing, and usage practices. By adhering to these standards, manufacturers and consumers alike benefit from enhanced reliability, performance, and energy efficiency in electric motor applications, paving the way for a more sustainable and technologically advanced future.

Not sure how NEMA or IEC Standards impact your operations? Contact your local Dreisilker representative and learn more.

 

How to Store Electric Motors

May 3, 2023/0 Comments/in Uncategorized /by Lynn Dreisilker

Are you storing electric motors for temporary or indefinite use? Proper storage for electric motors is essential for your equipment. In the long term, properly storing your motor can help maintain its performance and reduce repair costs. Dreisilker, with over 68 years of experience in electric motor repair, provides a motor storage program so you don’t have to worry about storing your motors on your own.

When it comes to storing electric motors, there are several important components to consider. Specifically, proper environment and bearing maintenance.

The Environment of your Electric Motor Storage

It’s critical to make sure the environment where you store your electric motor is kept at optimal conditions.

Climate control

Humidity and temperature vary by type of motor, but in general it should be stored in a temperature-controlled space that is not too humid. Temperature fluctuations caused by constant naturally occurring heating and cooling cycles should also be avoided.

Threat of contamination

Electric motors should be stored in a clean environment in order to prevent contamination to the motor. Taking the extra step of covering the motor in a cardboard box or a tarp can prevent dust and other contaminants entering the electric motor.

Rodent control

Rodents such as mice or squirrels are known to cause havoc on many things, such as electric motors. Ensuring that the space where you store your electric motors is critical so that you don’t have any unexpected chewed wires or contamination from rodents nesting in your motors.

Bearing Maintenance for Electric Motor Storage

Another important factor in storing your electric motor is turning the bearings regularly. Bearing maintenance helps prevent the formation of rust, which can lead to a complete failure of the system. This can be accomplished by hand, but if you don’t want to take that approach, Dreisilker’s motor storage program can turn the bearings for you as part of our storage cycle.

When Should you Store a Spare Electric Motor?

There are many factors that go into deciding whether or not you should keep a spare electric motor on hand. Some factors include how common the motor is, how critical the motor is to your operations, and cost of a spare. Check out our guide here:

The bottom line is that properly storing electric motors is one of the most important factors in making sure that your machinery is safe and runs smoothly. Dreisilker’s motor storage program provides a service for turning bearings during storage and protection from atmospheric contaminants, so you don’t have to worry about storing electric motors on your own. With the help of Dreisilker’s motor storage program, the longevity of your motor and its performance can be maintained and repair costs can be saved.”

The Benefits of Regular Preventative Maintenance for Electric Motors in Manufacturing

April 28, 2023/0 Comments/in Uncategorized /by Lynn Dreisilker

The Importance of Preventative Maintenance for Electric Motors in Manufacturing Applications

Professionals across many industries understand the value of preventative maintenance and the importance of having a good working knowledge of the electric motors being used in manufacturing operations. In fact, electric motors are one of the most vital pieces of equipment in a manufacturing process, driving virtually all production equipment and processes.

For these reasons, it’s critical for businesses to understand the importance of preventing motor failure and how preventative motor maintenance can help increase productivity, reduce downtime, and save money in the long run.

Unfortunately, electric motors, regardless of the size and type, all fail eventually without proper maintenance. The effects of motor failure are felt throughout the entire manufacturing operation, disrupting equipment operation and resulting in high costs for repair and replacement.

Because of these risks, manufacturers should focus on preventative motor maintenance to extend the life of their motors and increase productivity. Preventative maintenance not only provides an early warning of potential motor issues, but also helps manufacturers identify potential upgrades and replacements to avoid future motor problems.

Preventative maintenance typically includes servicing motors regularly and replacing parts as needed. These regular maintenance procedures can help to reduce downtime, improve motor performance, and extend the life of the motor and maximize production.

Common Preventative Maintenance Tasks for Electric Motors:

• Inspecting the bearings regularly
• Replacing brushes and checking the commutator for wear (see DC Motors: Common Problems and Maintenance of Brushes)
• Inspect and clean the motor, including cleaning of the terminals, cables, and other components
• Check and adjust the drive belt, alignment of the pulley, and tension (see How Improper Belt Tension can Affect your Belt Drive System)
• Check the cooling fan and lubrication system
• Test the overall performance of the motor

To ensure the best results, it’s recommended that these tasks be repeated on a regular basis and that any repairs or replacements are made as soon as possible. Doing so will help to keep motors running smoothly with less downtime and less risk of failure. Refer to your operation’s maintenance schedule, as well as any manufacturer’s manuals to understand the frequency and tasks to complete.

Preventative Maintenance offered by Dreisilker:

Dreisilker has experienced field service technicians who are skilled at performing preventative maintenance on electric motors. Some of the services offered by Dreisilker include:

Infrared Inspection

Our certified technicians can perform infrared inspections to detect loose connections, damaged wiring, overloads, and faults by sensing high temperature areas. Learn more here: Infrared Inspections and How They Can Prevent Costly Downtime

Laser Shaft Alignment

Laser shaft alignment ensures that the equipment is perfectly aligned to limit risk of vibration. Learn more here: How to: Laser Shaft Alignment

Motor Diagnostic Testing

Dreisilker’s field service technicians can perform many tests on motors in your operations to understand the health and any issues with your motors.

Variable Frequency Drive Support

VFDs are critical to the uptime and efficiency of your electric motor. If you are experiencing issues with your VFDs, call our Drive Expert to see how we can help.

Vibration Analysis

Vibration is a very common cause of failure for electric motors and can caused by any number of conditions. Our field service technicians perform quarterly vibration analysis for many customers in order to create a baseline for our customer’s operations. We are able to see trend and predict failure for motors based on the data. Find more information about how we can help you here: Vibration Analysis

Common Causes of Failures for Electric Motors:

  • Bearing failure
  • Winding failure
  • Vibration
  • Contamination
  • Age of motor

Check out our blog on common causes of failure for servo motors and how to prevent it: Common Causes of Servo Motor Failures and Preventative Measures to Limit Downtime

Overall, electric motors in manufacturing applications need to be well-maintained to avoid failure, reduce downtime, and maintain production. By following a regular maintenance program and addressing any motor issues quickly, industry professionals can prevent motor failure, reduce downtime, and save money in the long run.”

The Importance of Balancing Electric Motors

February 17, 2023/0 Comments/in Uncategorized /by Lynn Dreisilker

What does balance mean in terms of an electric motor?

Balance for an electric motor refers to ensuring that the rotating parts of the motor, such as the rotor and the shaft, are evenly distributed in weight and properly aligned. When a motor is balanced, it means that these parts spin smoothly and evenly, without causing any unnecessary vibration or wobbling.

Balancing your electric motors during a repair is important for several reasons:

  1. Reducing Vibration: When an electric motor is out of balance, it can cause excessive vibration, which can damage the motor and other components in the machinery. By balancing the motor, you can reduce the vibration and prevent unnecessary wear and tear on the machine.
  2. Increasing Lifespan: Over time, an unbalanced motor can cause damage to its bearings, shafts, and other components. By balancing the motor, you can prevent premature wear and extend the lifespan of the motor and the machinery.
  3. Ensuring Safe Operation: An unbalanced motor can also create safety hazards by causing excessive vibration, which can lead to mechanical failure or even catastrophic failure. By balancing the motor, you can ensure safe and reliable operation.

Overall, balancing your electric motors during a repair is an important step to ensure that the motor is running smoothly, efficiently, and safely. It can help to prevent costly repairs, extend the lifespan of the motor, and improve the overall performance of the machinery.

What are the steps of balancing an electric motor?

Balancing an electric motor or any rotating apparatus requires time to make sure you get the balance correct. Here are the basic steps we take when balancing a motor:

  1. Check the motor: Before balancing, ensure that the motor is clean and has no loose parts
  2. Test the initial balance of the motor: We utilize a Schenk balancing machine that spins the rotor and uses computerized software to determine the balance of the rotor.
  3. Attach correction weights: Our trained technician evaluates the report from the Schenk balancing machine and determines where to add correction weights onto the rotor.
  4. Test the new balance of the motor: After our technician has added more (or less) weight to the motor, they then test the motor’s balance to view the report.
  5. Repeat until standards are met: Our technicians repeat the process of adding or subtracting weight to the motor, testing the balance, and then reading the report. They do this until they meet our balancing guidelines.

What standards are used for balancing a motor?

Dreisilker follows ISO 1940-1 Standards. The balancing rating is determined by speed and weight, however we consistently exceed the standards by going to the next balancing grade. Overall, balancing your electric motors during a repair is an important step to ensure that the motor is running smoothly, efficiently, and safely. It can help to prevent costly repairs, extend the lifespan of the motor, and improve the overall performance of the machinery.

The Basic Steps of an Electric Motor Rewind

March 31, 2022/0 Comments/in Electric Motors, Uncategorized /by Lynn Dreisilker
the basic steps of an electric motor rewind

Talk to an expert about Motor Rewinding

 

 

1. Documentation and Testing before an Electric Motor Rewind

  • We conduct a coreloss test before stripping
  • Measure and record physical dimensions
  • Cut the winding head for preservation of data

2. Electric Motor Rewind: Stripping

The stripping of your windings is a very important part of the repair process. Ask your shop how they strip your windings. Dreisilker utilizes MotorSafe stripping that protect the motor and its laminations.

3. Additional Testing

We conduct another core loss test after stripping to make sure the stripping process didn’t damage anything. Plus we compare the results to the previous core loss testing results to see whether or not hot spots were removed.

4.Wire Selection for an Electric Motor Rewind

Our stripping method leaves us with a winding head and 3 phase coils. This allows us to choose the appropriate wire for your motor. We always use Class H insulated wire or better.

5. Automated Coil Winding

We utilize computerized coil winding machines which ensures every phase of your motor has the same length of coils, creating equal resistance and inductance within each phase.

6. Crease and Cuffing during an Electric Motor Rewind

We use high quality slot paper that we crease and cuff for every slot. This allows for mechanical rigidity of the windings which limits vibration and increases reliability.

7. Electric Motor Coil Insertion

Our experienced winders take great care not to damage the copper wire’s enamel while inserting the slow. We use a temporary sleeve to protect the wire from scratches when inserting the coils into the slots.

8. Tie Down Slots during an Electric Motor Rewind

Our winders take the time to tie down every slot. This helps to ensure rigidity of the winding head, reducing vibration and improving reliability. Some repair shops and even motor manufacturers take a short cut and tie down every other slot.

9. Final Testing of an Electric Motor Rewind

To ensure quality of our windings, we conduct many tests including visual inspection, hi pot, milliohm resistance, insulation resistance, surge testing, rotation test, record current, and more.

When do you repair or replace your electric motor?

March 30, 2022/0 Comments/in Uncategorized /by Lynn Dreisilker

There are many factors to review when considering repairing or replacing your electric motor. Some elements include pricing, lead times, condition of the electric motor, past history, and more. Below you will find some general guidelines that we use when working with our customers to determine if they should repair or replace their electric motor.

How critical is your electric motor?

Does the failed electric motor result in your production being ground to a halt, or is it on a machine that you only use occasionally? If your production is down due to this motor failure, your company is losing money. The criticality of your motor to your production line impacts how you will decide to repair or replace your electric motor. This will be discussed further in regards to the cost of repair vs replace, as well as the lead time of the replacement motor.

Do you have a spare on hand? If you have a spare electric motor on hand for your failed motor, it is going to alleviate some of your decision making below because you are not pressed for time. If you do not have a spare, we’ll walk you through how to decide repair or replace when thinking about cost and lead time. We strongly recommend having a spare on hand for critical machines. However, we understand that sometimes it is not financially feasible for some companies to have a spare for their equipment.

Learn more about keeping a spare on hand in our blog post: When to have a Spare Electric Motor

spare motors in storage

We keep a large stock of spare motors for printing presses and CNC machines so that we can help out our customers in a pinch.

Electric Motor Repair or Replace: Price

Whenever we have an electric motor in our repair shop, we investigate the cost of new for our customers. We always want to provide options so that our customers can make an informed decision on whether to repair or replace. Generally, when the cost of repair is 50% to 80% the cost of new, we recommend a replacement motor. We realize that this is a wide guideline, but there are many factors that go into this decision, such as lead time, energy savings, like for like replacement and etc.

Please keep in mind that one should make sure that the motor replacement option is suitable for your application. Occasionally we witness cost saving methods in the form of finding a cheap replacement from a less reliable manufacturer versus a higher cost – high quality manufacturer. If you choose to go this route, understand that the lifetime and reliability of your motor may be negatively affected and that it can result in higher maintenance costs down the line.

Another factor that can impact the price in this decision is the condition of the motor. If the failed motor requires a simple overhaul, the cost of repair might beat the guideline of 50 to 80% cost of new. However, if a motor requires a complete overhaul (think rewinding, machining work, and etc.) the cost of repair very well may exceed the cost of new.

Does size matter? Once a standard motor is below a certain size, it is more economical to replace than to repair. Generally speaking, any standard AC induction T frame motors at or below 50 to 75 Horse Power (HP) are more economical to replace. Our experienced motor experts will help you with this determination.

Carrollton Branch Manager

HVAC Motors can typically be more economical to replace than to repair.

Electric Motor Repair or Replace: Lead Time

Finding out the lead time of a replacement motor or repairing your motor is important in your decision making. If there is a replacement motor readily available and its cost is not excessively high compared to repair cost, it’s an easy decision to replace. On the other hand, if the lead time for new is longer than the lead time for a repair, you need to take a step back to evaluate. Here’s an example situation:

Cost of downtime per hour= $1,000/Hour

Standard Hours per week= 40/Week

Cost of New= $10,000, 4 weeks lead time

Cost of Repair= $20,000, 1 week lead time

Cost of new, including lost production would equal: $10,000+($1,000*(40*4))=$170,000

Cost of repair, including lost production would equal: $20,000+($1,000*(40*1))=$60,000

Electric Motor Rewinding

With long lead times for replacement motors, your best option may be to have our experts repair your motor back to new.

Still Unsure On What To Do? Take Our Quick Quiz:

If you’re still weighing the pros and cons, our quick quiz can help guide your decision. Just answer a few questions about your motor’s condition and application — and we’ll recommend whether repair or replacement is the better move.

Electric Motor Repair or Replace: Other Factors

We have gone over two of the most important considerations in your repair vs replace decision: Price and Lead time. While these are the leading factors, some other conditions to think about include energy savings, specifications of a replacement motor, past repair history, and how often this motor has failed in the past.

Energy Savings

Motor manufacturers strive to improve energy efficiencies on their product. If your failed motor is really old, the new motor very well may have better energy efficiencies than your old one. Replacing your motor in this case may lead to energy savings.

Replacement Motor Specifications

While the replacement motor’s nameplate specifications may be the same as your old motor, the size of the actual motor itself may be different (smaller). The smaller size of the new motor may make it difficult for your team to install it in the original application. Double check the dimensions of the motor and its frame with your Dreisilker representative.

In Conclusion

There are many factors that go into deciding whether to repair or replace your electric motor. Our experienced motor experts help many customers every day to make this important decision. We’ll help you figure our pricing and lead time, as well as consider any other factors that may impact your decision. Call us today if you have questions about electric motor repair or replace.

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