Crankshaft sprockets are arguably one of the most critical components in an engine, responsible for maintaining precise valve timing. They are subjected to immense torsional shock (especially during start-up), high shear forces (driving the camshafts), and continuous engine heat and oil exposure. Any movement or slippage of the sprocket is catastrophic,leading to immediate and severe engine damage. This is a non-negotiable High Strength, Permanent application.
The optimal solution is a high-strength retaining compound engineered for absolute rigidity and extreme thermal conditions.
INCURE WeldLock™ 347 Retaining Compound (Green)
The INCURE WeldLock™ 347 Retaining Compound is the definitive choice for securing crankshaft sprockets. It is a high-strength solution specifically designed to withstand the extreme dynamic loads and high temperatures of engine components, ensuring absolute timing integrity.
| Key Feature | Performance for Crankshaft Sprockets |
| High Strength, Fast Curing | Creates a monolithic bond that resists the extreme torsional shock and shear forces of the crankshaft, permanently locking the sprocket in precise alignment. |
| Temperature Resistance (175∘C) | Maintains full structural integrity under the sustained, elevated temperatures near the front of the engine, ensuring a long-term, fail-safe bond. |
| Ideal Gap Fill (Up to 0.15mm) | Perfectly secures press-fit sprockets, eliminating the micromovement (fretting) that destroys the crank-to-sprocket interface and compromises timing. |
| Core Application | Specifically suited for securing gears and rotating elements in motors and mechanical drives, matching the exact demands of the crankshaft. |
Application Note: Crankshaft Sprocket Installation
Use WeldLock™ 347 when installing the timing sprocket onto the crankshaft snout. The compound ensures that the sprocket is rigidly fixed, preventing any slippage that would alter critical valve timing. This is essential, even if a keyway or keyless friction fitting is present, as it eliminates micromovement that can lead to fretting failure.
Application Steps:
- Preparation: Thoroughly clean the crankshaft snout and the sprocket bore surfaces to remove all oil and residue.Use an industrial solvent and allow to dry completely.
- Application: Apply a continuous, thin bead of WeldLock™ 347 around the entire circumference of the inner bore of the sprocket or the crankshaft snout. Ensure the adhesive fully wets the entire mating surface.
- Assembly: Immediately press or slide the sprocket into its final timed position on the crankshaft.
- Cure: Allow a full 24 hours for the compound to reach maximum strength before starting the engine or subjecting the assembly to operational loads.