What material does FANUC recommend for threaded fasteners?

FANUC recommends using Loctite 242 or 262 for threaded fasteners due to the specific properties these products offer. Loctite 242 is a medium-strength threadlocker that allows for easy removal, making it suitable for applications where occasional disassembly might be necessary. On the other hand, Loctite 262 provides a stronger bond, ideal for situations where permanent assembly is required.

Using a threadlocker like Loctite helps prevent fasteners from loosening due to vibration and improves the overall reliability of the assembly. The specific type selected should correlate with the application requirements, such as environmental conditions and the need for maintenance.

Other materials listed, such as epoxy glue, WD-40, and silicone sealant, do not serve the same function. Epoxy is typically used for bonding materials and may not allow for the necessary adjustments or removals needed for threaded fasteners. WD-40 is a lubricant and penetrating oil, not designed for locking fasteners in place. Silicone sealant is primarily used for providing waterproof seals and does not provide the thread locking capability required in these applications. Thus, the use of Loctite specifically addresses the need for enhanced security in threaded connections.