Threadlocker[6]

Updated: 2026-09-29

Overview

Screw bearing locking adhesive is an anaerobic adhesive designed to secure threaded fasteners and bearings in high-vibration environments. These adhesives cure in the absence of air and when confined between metal surfaces, forming a durable bond that prevents loosening over time. They are widely used in industries where mechanical integrity is critical. The product comes in various formulations, including removable (low-strength) and permanent (high-strength) types. The choice depends on the application requirements, such as desired disassembly ease and environmental conditions.

Structure and Working Principle

Screw bearing locking adhesives are typically composed of methacrylate-based monomers with additives to enhance performance. The adhesive remains liquid until it is deprived of oxygen, at which point polymerization occurs, creating a solid, high-strength bond. This curing mechanism makes it ideal for threaded joints. Once applied, the adhesive fills microscopic gaps between threads, hardening to lock the fastener securely in place. The bond resists vibration, thermal cycling, and chemical exposure, ensuring long-term reliability.

Key Features

These adhesives provide excellent resistance to dynamic loads, making them indispensable in automotive and aerospace applications. Their anaerobic nature ensures curing only where needed, without excess residue. Some formulations include lubricants to facilitate assembly while maintaining holding power. Temperature resistance varies by product, with high-performance variants capable of withstanding temperatures up to 150–200°C. The adhesive also protects against corrosion, further extending the life of mechanical assemblies.

Application Areas

Screw bearing locking adhesives are extensively used in the automotive sector for engine components, transmission systems, and chassis fasteners. In aerospace, they secure critical components subjected to extreme vibration. Industrial machinery and electronics also benefit from their reliable thread-locking properties. Additionally, these adhesives are employed in marine applications, where saltwater exposure demands corrosion-resistant solutions. DIY and maintenance applications include securing bicycle parts and household appliances prone to loosening.

Maintenance and Precautions

Proper application is crucial for performance. Surfaces should be clean and free of oil or grease before applying the adhesive. Only a small amount is necessary—excess can impede disassembly. For non-permanent applications, controlled-torque tools are recommended for reassembly. Store the adhesive away from direct sunlight and extreme temperatures to prevent premature curing. Use in well-ventilated areas, and follow manufacturer safety guidelines regarding skin and eye contact.

B2B Procurement Guide

When procuring screw bearing locking adhesives in bulk, consider viscosity, cure speed, and strength specifications. High-viscosity variants suit larger threads, while low-viscosity types are better for fine threads. Verify compatibility with substrate materials like stainless steel, aluminum, or plastics. Request technical data sheets and industry certifications (e.g., ISO, MIL-SPEC) for quality assurance. Suppliers with customizable packaging options and volume discounts are preferred for cost-effective procurement.