Securing gearbox bearing races (both inner races onto the shaft and outer races into the transmission case bore) is an absolutely vital maintenance procedure. This joint is subjected to massive axial thrust (from helical gears), high radial loads, continuous vibration and shock, and significant heat generated by friction. Maintaining a precise, zero-clearance fit is non-negotiable to prevent bearing creep (rotation), fretting corrosion, and subsequent gear misalignment and catastrophic failure.
INCURE WeldLock™ 365 Retaining Compound
For securing high-stress gearbox bearing races—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 races are held immovably, preserving the critical alignment and geometry of the gear mesh under maximum load and temperature.
| Feature & Benefit | Technical Insight for Gearbox Bearing Races | Conversion Value |
| Highest Strength (365) | Cures to an extremely high-shear strength, rigid plastic, providing maximum resistance to axial thrust and heavy radial loads. | Zero Fretting/Creep: Eliminates all micro-movement, preserving gear mesh and preventing premature bearing/shaft wear. |
| High Temperature Resistance | Withstands continuous operational temperatures up to 200∘C (392∘F), essential for gearboxes that generate intense heat from friction and oil churn. | End the Heat Threat: Guarantees the joint won’t fail or soften under maximum gearbox 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) typical of precision shaft assemblies. | Maximizes Contact: Converts the press fit into a monolithic, integrated component, optimizing load distribution. |
| Gear Oil Immunity | Inert to transmission fluid, gear oil, and synthetic lubricants, ensuring the integrity of the joint is protected within the fluid environment. | Reliability Assured: The bond remains permanently intact despite constant saturation with hot lubricants. |
Application Steps: Locking Gearbox Bearing Races for Maximum Gearbox Life
Preparation (Critical): Thoroughly clean both the bearing race mating surface (inner race bore or outer race OD) and the shaft/housing bore. Remove all gear oil, grease, 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 where the inner race will sit,or around the housing bore where the outer race will sit. Ensure the compound completely covers the mating area.
Assembly: Press the bearing race into position using the manufacturer’s specified pressing 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 refilling the transmission with fluid or operating the unit under load.
Alternative Consideration (Worn Housings or Shafts): If the housing bore or shaft is worn and the clearance gap 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 bearing creep and ensure your gearbox assemblies are absolutely rigid and reliable.