Securing the components of a crane hoist gear assembly (such as gears onto shafts, pinions, and bearing races) is an extremely high-stress, safety-critical application. This joint is subjected to massive torsional loads (lifting and lowering), high axial thrust, continuous shock forces, and exposure to gear oil and heat. Maintaining a zero-clearance, non-shifting fit is vital to ensure proper gear mesh, prevent gear walk, fretting corrosion, and catastrophic failure of the lifting mechanism.
INCURE WeldLock™ 365 Retaining Compound
For securing high-stress hoist components—where maximum shear strength, high-temperature resistance, and absolute rigidity are paramount for safety—the WeldLock™ 365 provides the highest structural integrity. Its superior strength ensures gears and pinions cannot slip, maintaining precise alignment under the immense, dynamic loads of hoisting operations.
| Feature & Benefit | Technical Insight for Hoist Gear Assemblies | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to torsional load and shock forces. | Zero Slippage: Guarantees absolute, 100% torque transmission and prevents fretting corrosion on gear bores/shafts. |
| High Temperature Resistance | Withstands continuous operational temperatures up to 200∘C (392∘F), essential for gearboxes generating friction heat under load. | 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 gear mesh and load distribution. |
| Gear Oil Immunity | Inert to heavy gear oil, synthetic lubricants, and assembly fluids, ensuring the integrity of the joint is protected. | Reliability Assured: The bond remains permanently intact despite constant saturation with hot lubricants. |
Application Steps: Locking Hoist Gears for Maximum Safety
Preparation (Critical): Thoroughly clean both mating surfaces (e.g., the gear bore and the shaft surface). Remove all oil, grease, paint, and residue. Use a powerful 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 gear bore. Ensure the compound completely covers the mating area.
Assembly: Press or slide the component (gear, pinion, or bearing race) into position. Ensure the component is fully seated and wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a full 24 hours for the compound to reach full cure strength before refilling the gearbox with oil or subjecting the crane to operational load. This is a crucial safety step.
Alternative Consideration (Worn Housings or Shafts): If the bore-to-shaft clearance is larger (up to 0.25 mm), use INCURE WeldLock™ 356 (Metallic Grey). This compound is specifically formulated with fillers to tolerate larger diametrical clearances while still providing high structural integrity.
Stop risking catastrophic failure and ensure your crane hoist gear assemblies are absolutely rigid and reliable.