Optical device bearing retention requires a secure, concentric fit to prevent vibration and maintain precise alignment (which is critical for optical clarity and function). However, these bearings often require routine replacement, cleaning, or highly accurate repositioning during calibration. This demands a retaining compound with the absolute lowest strength to ensure easy, non-destructive disassembly.
This is a Functional Low Strength, Easily Serviceable application.
INCURE WeldLock™ 338 Retaining Compound (Yellow)
The INCURE WeldLock™ 338 Retaining Compound is the functional low-to-medium strength solution. Although it provides good holding power, it is specifically designed for applications where future disassembly is required. This makes it the most serviceable and lowest-strength option available that still provides anti-vibration qualities necessary for optical precision.
| Key Feature | Performance for Optical Device Bearings |
| Serviceable Bond (Yellow) | Designed for assemblies requiring easy removal or repositioning. Locks the bearing securely but allows for simpler, non-destructive separation for calibration or service. |
| Excellent Vibration Resistance | Provides reliable holding power against small motor/fan vibration and minor shocks, ensuring the optical path remains stable. |
| Gap Fill (Up to 0.25mm) | Effectively fills the small clearances typical in precision assemblies, eliminating play that could degrade optical performance. |
| Core Application | Suited for secure yet serviceable joints in precision instrumentation. |
Application Steps: Installing Optical Device Bearings
For optimal concentricity and reliable, yet removable, installation of the bearings, follow these steps:
1. Surface Preparation
- Clean: Thoroughly clean the housing bore and the bearing’s outer race. Surfaces must be absolutely free of all grease, oil, and contaminants. Use a precision cleaner or solvent (e.g., isopropyl alcohol or acetone) and wipe dry.
- Activate (If Needed): Due to the small size and precise nature of these assemblies, applying a chemical activator can ensure faster, more consistent curing.
2. Product Application
- Apply: Apply a minimal, continuous, thin bead of WeldLock™ 338 around the full circumference of either the outer race of the bearing or the internal bore of the housing.
- Ensure Coverage: Ensure the adhesive completely wets the entire mating surface as the components slide together.
3. Assembly and Curing
- Assemble: Immediately slide or press the bearing into the housing bore. Ensure the components are aligned correctly.
- Wipe Excess: Remove any excess adhesive visible outside the joint immediately after assembly.
- Cure: Allow the assembly to fixture before handling (typically 10-30 minutes). Allow a full 24 hours for the compound to reach maximum strength before placing the device into calibration or service.