Securing press-fit locating pins (dowels, alignment pins) into bores is a fundamental application for maintaining the precise dimensional relationship between two or more components (e.g., aligning engine casings, jig components, or industrial fixture blocks). While press-fitting provides initial alignment, constant vibration, thermal cycling, and assembly/disassembly cycles can cause pins to walk out or rotate, compromising alignment. A retaining compound converts the press fit into a permanent, rigid bond, ensuring the pins never shift.
INCURE WeldLock™ 330 Retaining Compound
For securing locating pins—which are often permanent, require high shear strength, and typically involve very small,close-tolerance gaps—the WeldLock™ 330 is the ideal solution. It is a high-strength compound optimized for low viscosity and minimal gap filling, allowing it to wick into the extremely tight clearances typical of precision pin installations while providing reliable, high retention strength.
| Feature & Benefit | Technical Insight for Locating Pins | Conversion Value |
| Low Viscosity | Excellent wicking action ensures the compound flows easily into the extremely tight, close-tolerance gaps (interferences or slip fits) of precision pins. | 100% Surface Contact: Guarantees the entire mating surface is bonded, maximizing alignment rigidity. |
| High Shear Strength | Provides high retention strength to resist axial pull-out and rotational forces, preventing the pin from loosening under vibration. | Permanent Alignment: Ensures the pins maintain their precise position for the life of the assembly. |
| Fills Zero Clearance Gaps | Designed for components with close tolerances (less than 0.05 mm diametral clearance). | Maximizes Precision: Maintains the specified dimensional accuracy between assembled parts. |
| High Temperature Resistance | Withstands operational temperatures up to 150∘C (302∘F), suitable for many industrial and engine housing applications. | Reliability Assured: The bond remains permanently intact despite thermal fluctuations. |
Application Steps: Locking Locating Pins for Maximum Accuracy
Preparation (Essential): Thoroughly clean both the locating pin surface and the housing bore. 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 bead of WeldLock™ 330 evenly around the pin surface where it will enter the bore. Ensure the compound completely covers the mating area. For blind holes, apply the compound inside the bore itself.
Assembly: Press or drive the pin into the bore using the manufacturer’s specified tools. Ensure the component is fully seated. Wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a minimum of 24 hours for the compound to reach full cure strength before continuing assembly or subjecting the joined components to load or vibration.
Stop risking misalignment and ensure your precision locating pins are absolutely fixed.