Securing the components of an optical encoder shaft assembly (such as the code disk/wheel, bearing inner race, or coupling hub) is a highly delicate, precision application. This joint is subject to high rotational speed, constant vibration, and demands absolute zero run-out and concentricity to maintain signal accuracy. Any micro-movement compromises the resolution and precision of the encoder, leading to measurement errors. A high-strength retaining compound is used to eliminate all radial clearance, ensuring a permanent, zero-slip assembly.
INCURE WeldLock™ 330 Retaining Compound
For securing optical encoder components, which typically involve extremely tight, high-precision fits, the WeldLock™ 330 is the ideal solution. It is a high-strength compound optimized for low viscosity and minimal gap filling, allowing it to penetrate the microscopic clearances characteristic of these precision components while providing high retention strength without introducing imbalance.
| Feature & Benefit | Technical Insight for Encoder Shaft Assemblies | Conversion Value |
| Low Viscosity | Flows easily into the extremely tight, close-tolerance gaps (interference or slip fits) of precision components. | 100% Surface Contact: Guarantees absolute rigidity, preserving zero run-out and concentricity. |
| High Shear Strength | Provides high retention strength to resist rotational slip and axial forces, preventing the code disk from loosening under vibration. | Permanent Precision: Ensures the encoder maintains its specified resolution and accuracy for life. |
| Fills Zero Clearance Gaps | Designed for components with extremely close tolerances (less than 0.05 mm diametral clearance). | Maximizes Rigidity: Converts the fit into an integrated component, optimizing dynamic balance. |
| High Temperature Resistance | Withstands operational temperatures up to 150∘C (302∘F), suitable for high-speed servo and motion control systems. | Reliability Assured: The bond remains permanently intact despite thermal fluctuations. |
Application Steps: Locking Encoder Components for Maximum Accuracy
Preparation (Critical): Thoroughly clean both the component bore (disk/hub) and the encoder shaft surface. Remove all oil, grease, and residue. Use a high-purity degreasing solvent (like acetone or industrial cleaner) and wipe until both metal surfaces are perfectly dry.
Application: Apply a small, continuous bead of WeldLock™ 330 evenly around the shaft surface or the inside circumference of the component bore. For extremely tight fits, apply the compound and allow it to wick fully into the clearance after assembly.
Assembly: Press or slide the component onto the shaft. Ensure the component is seated correctly (axially) and wipe away any excess compound immediately.
Curing Time (Mandatory): Allow a full 24 hours for the compound to reach full cure strength before continuing assembly (installing housing) or operating the encoder.
Stop risking signal jitter and measurement error, and ensure your optical encoder shafts are absolutely locked for maximum precision.