Mounting a coupling onto a shaft is a precision application, particularly in systems where misalignment or run-out must be minimized (e.g., pumps, compressors, and motor drives). Couplings must transfer significant torque and axial loadwhile ensuring precise concentricity between the joined shafts. Traditional methods often rely on taper locks or keys, which can still lead to micro-movement, fretting corrosion, and eventual vibration, damaging the coupling and adjacent bearings. Retaining compound eliminates this clearance, creating a rigid, high-precision, slip-free bond.
INCURE WeldLock™ 365 Retaining Compound
For securing rigid and flexible couplings—where maximum shear strength and concentricity are paramount—the WeldLock™ 365 provides the highest structural integrity. Its superior strength prevents rotational slip and ensures that the coupling is held in perfect alignment, minimizing vibration and maximizing the lifespan of the entire drivetrain.
| Feature & Benefit | Technical Insight for Coupling-Shaft Assemblies | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to torsional slip and heavy axial pull-out. | 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 high-speed or high-load applications that generate heat. | 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 Concentricity: Converts the fit into an integrated component, optimizing balance and shaft alignment. |
| High Vibration Dampening | The rigid polymer fills the entire gap, preventing metal-to-metal contact and dampening vibration throughout the joint. | Extended Component Life: Reduces stress on shafts and sensitive bearing assemblies. |
Application Steps: Locking Couplings for Maximum Drivetrain Integrity
Preparation (Essential): Thoroughly clean both the coupling 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 coupling bore. Ensure the compound completely covers the mating area.
Assembly: Slide or press the coupling onto the shaft. Ensure the coupling is seated correctly (axially) and 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 assembly to operational torque, speeds, or load.
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 metallic fillers to tolerate larger gaps while still providing high retention strength.
Stop risking coupling slippage and ensure your power transmission assemblies maintain perfect alignment.