Securing the components of an armature shaft assembly (such as the armature core stack, commutator, or drive components) is essential for electric motor and generator reliability. This joint is subjected to massive rotational speed, intense torsional load, continuous vibration, and significant heat generated by electrical resistance. Maintaining a zero-clearance fit is vital to prevent component slip, fretting corrosion, and catastrophic failure due to imbalance at high RPMs.
INCURE WeldLock™ 365 Retaining Compound
For securing high-speed, high-stress armature components—where maximum shear strength, high-temperature resistance, and absolute rigidity are paramount—the WeldLock™ 365 provides the highest structural integrity. Its superior strength ensures the core or commutator cannot shift, maintaining the critical balance and concentricity required for high-speed electrical operation.
| Feature & Benefit | Technical Insight for Armature Shaft Assemblies | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to centrifugal forces and torsional slip. | 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 components exposed to electrical and friction heat. | End the Heat Threat: Ensures the bond remains rigid and strong under maximum thermal load. |
| Fills Close Clearance Gaps | Ideal for the precision interference or slip fits (less than 0.05 mm diametral clearance) typical of electric motor manufacturing. | Maximizes Concentricity: Converts the fit into an integrated component, optimizing balance and reducing destructive vibration. |
| High Dielectric Strength | Anaerobic polymers generally possess good electrical insulating properties, which is beneficial near electrical components (though not a primary insulator). | Reliability Assured: The bond remains permanently intact despite electrical and thermal stress. |
Application Steps: Locking Armature Components for Maximum Reliability
Preparation (Critical): Thoroughly clean both mating surfaces (e.g., the core stack bore and the shaft OD). Remove all oil, grease, paint, and residue. Use a degreasing solvent (like acetone or industrial cleaner) and wipe until both metal surfaces are perfectly dry.
Application: Apply a continuous, liberal bead of WeldLock™ 365 evenly around the shaft surface or the inside circumference of the core bore. Ensure the compound completely covers the mating area.
Assembly: Press the component onto the shaft using the manufacturer’s specified tools. Ensure the component is fully seated. Wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a full 24 hours for the compound to reach full cure strength before continuing final winding/assembly or operating the motor/generator.
Stop risking vibration and ensure your armature assemblies are absolutely locked in place for maximum electrical efficiency and lifespan.