Mounting a rotor onto a motor shaft is an extremely demanding application, critical for electric motors, generators, and turbines. The joint must withstand intense torsional stress (torque), high rotational speeds, and significant vibration, all while maintaining precise concentricity to ensure smooth operation and efficiency. Retaining compound is used to eliminate the micro-gaps inherent in press or keyway fits, preventing fretting corrosion and guaranteeing a rigid, permanent assembly.
INCURE WeldLock™ 365 Retaining Compound
For securing high-speed or high-load rotors—where permanent retention and resistance to heat are paramount—the WeldLock™ 365 provides the highest structural integrity. Its superior strength ensures the rotor cannot slip axially or rotationally, which is vital for preventing catastrophic failure at high RPMs.
| Feature & Benefit | Technical Insight for Rotor-Shaft Assemblies | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to rotational slip and heavy centrifugal force. | Zero Slippage: Guarantees absolute, 100%torque transmission and prevents fretting corrosion. |
| High Temperature Resistance | Withstands continuous operational temperatures up to 200∘C(392∘F), essential for rotors that generate significant heat during sustained operation. | End the Heat Threat: Ensures the bond remains strong and rigid under maximum thermal load. |
| Fills Close Clearance Gaps | Ideal for components with an interference or true close-tolerance slip fit (less than 0.05 mm diametral clearance). | Maximizes Contact: Converts the fit into a monolithic assembly, optimizing balance and concentricity. |
| High Chemical Resistance | Inert to common motor oils, solvents, and environmental contaminants, ensuring the joint integrity is protected. | Reliability Assured: The bond remains permanently intact throughout the motor’s operational life. |
Application Steps: Locking Rotors for Maximum Reliability
Preparation (Essential): Thoroughly clean both the rotor bore and the shaft surface. Remove all oil, grease, paint, and residue. Use a degreasing solvent (like acetone or brake cleaner) and wipe until both metal surfaces are perfectly dry.
Application: Apply a continuous, liberal bead of WeldLock™ 365 evenly around the shaft surface. Alternatively, apply it to the inside circumference of the rotor bore. Ensure the compound completely covers the mating area.
Assembly: Slide or press the rotor onto the shaft. Ensure the rotor is seated correctly according to motor specification.Wipe away any excess compound immediately.
Curing Time (Critical): Allow a minimum of 24 hours for the compound to reach full cure strength before subjecting the motor to high loads, operational speeds, or voltage.
Alternative Consideration (Worn or Large Gaps): If the bore-to-shaft clearance is larger (up to 0.25 mm), use INCURE WeldLock™ 356 (Metallic Grey). This compound is formulated with fillers to tolerate larger gaps while still providing high retention strength.
Stop risking catastrophic failure and ensure your rotor assemblies are absolutely permanent.