Permanently Locking Swingarm Pivot Bolts for Chassis Integrity

  • Post last modified:October 8, 2025

The swingarm pivot bolt is a critical, structural linchpin. It is the single point of connection that governs rear suspension dynamics, chain tension, and overall chassis stability. This bolt is subjected to a constant barrage of forces: massive torsional stress from acceleration/braking, intense cyclical fatigue from suspension action, and severe lateral shockduring cornering. Pivot bolt failure is an immediate, catastrophic structural event, resulting in total loss of control and a severe accident risk.

For the engineering professional, securing this fastener is the ultimate act of structural and safety assurance. This demands a permanent, unyielding chemical bond.

This is the non-negotiable territory of the INCURE Re-Lok™ Red Series—featuring the B72 Heavy Duty and B77 Extreme Duty Threadlocking Adhesives. They are engineered to create a monolithic structural unity that absolutely prevents loosening under extreme, multi-axis load.

The Problem: Dynamic Forces and the Loss of Stability

Are your swingarm pivot bolts secured against these critical threats?

  • Multi-Axis Stress Loosening: The combination of vertical suspension movement, lateral cornering forces, and rotational drive torque quickly overcomes standard locking methods.
  • Chassis Geometry Compromise: Even minor loosening compromises the critical alignment and geometry of the suspension, leading to unstable handling and accelerated component wear.
  • Environmental Fretting: Exposure to moisture and road grit accelerates corrosion in the threads, weakening the joint over time.

Only a permanent, high-strength anaerobic lock can eliminate the internal micro-movement and maintain the clamp load under such punishing dynamic loads.

The Position: Unyielding Structural Bond for Critical Chassis Points

The INCURE Re-Lok™ Red Series is the defined solution for permanent, high-strength applications where structural failure is unthinkable. By curing into a durable thermoset plastic, the threadlocker completely fills all microscopic gaps, effectively unitizing the bolt and frame. This provides permanent resistance against the extreme shear, shock, and vibrational forces inherent to the pivot point.

Here is the strategic defense the Re-Lok™ Red Series offers for swingarm pivot bolts:

1. INCURE Re-Lok™ B72 Red Threadlocking Adhesive – Heavy Duty

The Heavy-Load and Thermal Defense.

While the primary concern is force, the pivot area can endure significant frictional heat transfer. The B72 (Heavy Duty) is essential for its ability to maintain its permanent, high-strength lock under extreme operating temperatures up to 230∘C (446∘F). This guarantees that the critical structural bond is not compromised by sustained operational heat or thermal cycling.

2. INCURE Re-Lok™ B77 Red Threadlocking Adhesive – Extreme Duty

The High-Chemical and Shock Resistance Fortress.

The B77 (Extreme Duty) is engineered for maximum overall resistance to dynamic shear and chemical degradation. Its high viscosity formulation ensures superior gap filling for maximum resistance against torsional forces and impact shock, while its excellent chemical resistance creates an impenetrable seal against water, road grime, and cleaning agents, protecting the internal threads from corrosive fretting.

The Strategic Payoff

By investing in the targeted, high-performance security of the INCURE Re-Lok™ Red Series, you are making a non-negotiable commitment to structural integrity and rider safety. You are guaranteeing the permanent stability of the rear suspension and chassis geometry, eliminating the risk of catastrophic failure in one of the most critical load-bearing assemblies.