Application of motor magnetic ring bonding case: EP 2012 epoxy adhesive helps to combine high strength and high reliability

In modern motor manufacturing, the bonding process of magnetic rings (magnetic steel, magnetic tiles) directly affects the balance and long-term reliability of motor operation. With the development of motors towards high speed and high efficiency, traditional adhesives are prone to problems such as delamination and strength attenuation under high temperature and centrifugal force. How to achieve high-strength, temperature resistant, and stable magnetic ring bonding in a limited space has become a common technical challenge faced by manufacturing enterprises.

Motor magnetic ring bonding
1、 Project Background
The magnetic ring adhesive used by the customer in the production process has a slow curing speed and insufficient bonding strength, resulting in loose magnetic rings and significant thrust fluctuations during high temperature and vibration testing. The main issues include:
Adhesive strength does not meet the standard: there is a risk of slip in the magnetic ring under centrifugal load;
Poor thermal stability: After 80 ° C thermal cycling, the thrust value fluctuates by more than 10%;
Long curing time: limited production pace, difficult to meet the requirements of rapid assembly;
Complex surface treatment: high cleaning requirements for adhesive substrates, which can easily affect consistency.
In response to the above issues, ELAPLUS recommends customers to use EP 2012 epoxy adhesive and achieve a dual improvement in magnetic ring bonding strength and batch production efficiency through process optimization.

2、 Adhesive requirements and process parameters
Glue requirements:
Colloidal color: black;
Curing conditions: 80 ° C for 1 hour;
Thrust requirement: Stable at around 800 N;
Adhesive materials: iron core metal and magnetic ceramic.
Process suggestion:
A. Mix component B evenly in a weight ratio of 100:45;
Apply evenly to the clean and dry adhesive surface;
After settling and draining the bubbles, proceed with assembly and positioning;
Curing at 80 ° C for 1 hour, or curing at room temperature for 24 hours.
After verification, this process balances production efficiency and adhesive strength, and significantly improves thrust stability.
3、 Recommended product: EP 2012 epoxy adhesive
EP 2012 is a two-component epoxy structural adhesive that can cure at room temperature or under heating conditions, designed specifically for bonding metals, magnetic materials, ceramics, and composite materials.
After solidification, it forms a dense and tough cross-linked structure that can withstand long-term high temperature and mechanical stress.
Motor bonding
Motor bonding
Core performance characteristics:
High adhesion strength: Excellent adhesion to steel plates, magnetic steel, fiberglass cloth, etc;
Excellent high and low temperature resistance: can work for a long time from -50 ℃ to 180 ℃;
Damp proof and anti-aging: effectively resist moisture, oil and other atmospheric pollution;
Low shrinkage rate: solvent-free, no curing by-products, less prone to internal stress;
Resistant to transformer oil and good electrical insulation: can also be used as a sealing material for sensors or motor components;
Strong construction compatibility: No strict surface pretreatment required, easy construction.
View EP 2012 epoxy adhesive details
4、 Verification and testing results
In the customer’s process validation, EP 2012 underwent a series of mechanical and environmental reliability tests, and the performance is as follows:
Motor magnet bonding
Performance of Test Conditions and Results for Test Projects
Adhesive strength: 80 ° C for 1 hour, cured to 20MPa without delamination
Thrust stability, 25 thermal cycle tests, with thrust fluctuation controlled within ± 2.5%
Peel test, -40 ° C~120 ° C cyclic adhesive layer without cracking or peeling
Damp heat aging, at 85 ° C/85% RH, with no significant decrease in adhesive strength after 500 hours
Insulation performance, 500V test, resistance ≥ 10 ¹³ Ω
The results indicate that EP 2012 can maintain stable performance under high temperature, high humidity, and dynamic loads, providing reliable long-term protection for motor magnetic rings.

5、 Technical Summary
The bonding of motor magnetic rings is a process that balances structural safety and thermal stability. EP 2012 epoxy adhesive, with its high strength adhesion, excellent temperature resistance, and low stress curing properties, effectively improves the overall reliability of motor components.
Its application is not limited to motor magnetic rings, but also widely used in:
Servo motor magnetic steel bonding;
Ceramic membrane module sealing;
Aluminum honeycomb panel splicing;
High temperature sensor packaging;
Soft magnetic unit fixation and other structural bonding scenarios.
EP 2012 epoxy adhesive provides a durable and reliable bonding solution for motor magnetic rings due to its high strength and stability performance.
While ensuring performance safety, it also helps manufacturing companies achieve more efficient and stable production processes.
If you are looking for a professional adhesive solution suitable for motor magnetic rings or magnets, please feel free to contact Yilian for product samples and technical support.
Tags: EP 2012 · Epoxy Adhesive · Motor Magnetic Ring Adhesive · Motor Magnetic Steel Adhesive · Motor Magnet Adhesive · Motor Structural Adhesive · High Temperature Resistant Epoxy Adhesive