Reliable Application Scheme of EP 1738 in Key Parts of High speed Motors
In the structure of high-speed motors, the “neck position” is a small and critical adhesive point.
Not only does it bear high-speed centrifugal force here, but it also has to face multiple working conditions such as high temperature, vibration, and thermal shock for a long time. Once the adhesive layer fails, it may cause abnormal noise and eccentricity, and in severe cases, the magnetic steel may fall off and the entire machine may be scrapped.
Neck glue
This is also the reason why “motor neck glue” has higher requirements for materials.
1、 What are the mandatory requirements for adhesive in the neck position of the motor?
Based on the actual application scenarios of high-speed motors, the use of adhesive needs to meet the following requirements simultaneously:
✅ 1. Good thixotropy, slightly collapsed but not sagging
No flow or drawing after dispensing
Micro collapse filling gaps under gravity or assembly pressure
Ensure even adhesive layer and avoid eccentricity issues
✅ 2. Stable appearance without yellowing
Color stability under long-term high-temperature operation
Does not affect assembly visual inspection and quality consistency due to aging
✅ 3. Stable high-speed operating conditions (≥ 30000 Rpm)
Can withstand high centrifugal force for a long time
The adhesive layer is not brittle, powdery, or debonding
✅ 4. High temperature resistance and resistance to thermal shock
Maintain structural strength even in high temperature environments
Stable adhesion performance after cold and hot cycles
2、 Recommended solution: EP 1738 single component epoxy structural adhesive
EP 1738 exhibits extremely high stability in practical applications for the complex working conditions of the neck position of high-speed motors.
🔧 Product Core Features
Single component, solvent-free
No volatilization, no shrinkage risk, suitable for use in precision structural parts
Excellent thixotropy, strong resistance to sagging
Glued molding is good, suitable for neck position, facade or narrow seam structure
Good toughness+resistance to thermal shock
Not brittle under high-speed vibration and temperature changes
Excellent comprehensive performance after high-temperature curing
high bonding strength
Stable electrical performance
Outstanding moisture resistance and mechanical performance
Meet the long-term usage requirements under high temperature conditions
Suitable for long-term high load operation environment of motors
3、 Typical application scenarios of EP 1738 in motors
In addition to the motor neck position, EP 1738 has mature applications in multiple highly reliable structures:
🔹 Motor magnet/tile bonding
Resistant to centrifugal force and high temperature without detachment
🔹 Fixed inductance coil
Suppress vibration and enhance structural stability
🔹 Adhesive bonding of automotive electronic module cover plate
Seismic resistance, moisture resistance, and resistance to thermal shock
🔹 Sensor bonding/chip flip bonding
Suitable for precision structures and high reliability
View EP 1738 details
4、 Why is EP 1738 more suitable for high-speed motors?
The summary in one sentence is:
When the three conditions of “high speed+high temperature+high reliability” are met simultaneously, EP 1738 still remains stable.
It is not pursuing “softness” or blindly “hardness”, but finding a balance between strength, toughness, and processability, which is very suitable for applications such as motors that operate for a long time and cannot be frequently repaired.
Tags: Epoxy structural adhesive · Motor neck adhesive · Structural adhesive · Neck adhesive
