Dongfeng Renault engine parts Elastic retaining ring for holes D5010224192

Crafted from high-carbon spring steel (65Mn), this retaining ring delivers exceptional elasticity and tensile strength—critical for withstanding the constant vibration and axial forces in Dongfeng Renault engines. The steel undergoes a quenching and tempering process that achieves a hardness of HRC 42–45, ensuring it retains its shape and tension even after repeated installation/removal cycles. Unlike low-carbon steel rings that lose elasticity over time, this spring steel design maintains a tight fit in hole grooves, providing consistent axial retention force (≥ 800 N) to secure components like bearings or bushings. Rigorous fatigue testing confirms the ring endures 100,000+ vibration cycles (10–2000 Hz) without deformation, ensuring long-term reliability in high-vibration engine environments

Designed specifically for hole-mounted applications, the retaining ring features a circular shape with two overlapping ends (a standard “internal” retaining ring design) that expand to fit the hole groove when installed. When compressed and inserted into the engine hole, the ring’s natural elasticity pushes its outer edges against the groove walls, creating a friction-locked fit that resists axial movement. This design eliminates the need for additional fasteners (e.g., bolts, pins) and provides 360° of uniform retention, preventing components from sliding out of the hole during engine operation. Unlike adhesive-based retention methods that fail in high heat, this mechanical fit remains secure even at engine operating temperatures up to 180°C

To withstand the harsh chemical and thermal environment of Dongfeng Renault engines (exposure to oil, coolant, and road moisture), the retaining ring features a zinc-nickel alloy coating (8–10μm thickness). This coating provides superior corrosion resistance, passing 1000 hours of neutral salt spray testing without rust or degradation—far exceeding the 48-hour standard of plain steel rings. The coating also enhances wear resistance, preventing galling (metal-to-metal adhesion) between the ring and hole groove during installation or engine movement. Additionally, the coating is heat-stable, retaining its protective properties at engine operating temperatures up to 200°C, ensuring the ring remains functional even in high-heat engine zones (e.g., near the exhaust manifold)

Engineered for hassle-free installation in engine assembly or repair, the retaining ring is compatible with standard internal retaining ring pliers (no specialized tools required). Its smooth, burr-free edges (achieved via precision deburring) prevent damage to the engine hole groove during insertion, reducing the risk of component misalignment. Each ring is manufactured in an IATF 16949 certified facility and undergoes strict quality checks: dimensional verification via laser measurement, elasticity testing (to confirm tension retention), corrosion resistance trials, and hardness testing. It complies with Dongfeng Renault’s engine component standards (Q/DFL specifications) and includes a 12-month warranty against manufacturing defects (e.g., cracking, loss of elasticity, or coating peeling). This ensures the ring provides reliable component retention and protects Dongfeng Renault engines from costly damage caused by loose parts