The hole spiral inner retaining ring (heavy load) is an axial positioning component for holes made of high-strength spring steel (such as 60Si2Mn) or alloy structural steel through spiral winding, quenching and tempering treatment. It is designed for heavy load scenarios with axial force ≥ 3000N (such as large bearings, heavy-duty gearboxes, engineering machinery hydraulic cylinders, etc.). Its spiral structure is formed by stacking multiple layers of materials (or single thick material roll) to form a "ring-shaped rigid support", which can stably withstand large axial forces under severe impact and high-frequency vibration, avoiding component loosening or displacement.
Core strengths
1. Ultra high load-bearing capacity and strong impact resistance
Materials and processes: 60Si2Mn spring steel (tensile strength 1200-1600MPa) or 40Cr alloy structural steel (hardness HRC42-48 after quenching and tempering) is used. After overall quenching and low-temperature tempering treatment, the fatigue resistance is improved by 40% compared to ordinary retaining rings, and it can withstand long-term high-frequency impact loads (such as the reciprocating motion of forging machine slides and crusher rotors).
Structural support: The "continuous annular support surface" formed by spiral winding (with a contact area three times larger than that of stamped retaining rings) can evenly distribute axial forces to the hole wall, avoiding deformation of the hole wall caused by local stress concentration (especially suitable for brittle material shells such as cast iron and cast steel).
2. Easy installation, suitable for complex working conditions
No welding or bolt fastening is required, and a special spiral retaining ring pliers (with an extension rod) can be quickly inserted into the groove, with installation efficiency 5 times higher than traditional shaft shoulder positioning.
Suitable for large aperture scenarios (with standard specifications ranging from 50mm to 500mm and customizable for larger sizes), with low requirements for groove accuracy (allowing ± 0.1mm error), suitable for rough hole machining environments of heavy equipment (such as excavator hydraulic cylinder barrels).
3. Resistant to harsh environments, with a lifespan far exceeding that of ordinary retaining rings
Optional surface treatments: galvanizing (general corrosion resistance), Dacromet (salt spray resistance for over 500 hours, suitable for outdoor construction machinery), carburizing (improving surface hardness to HRC58-62, wear-resistant).
In environments with high temperatures (-40 ℃ to 200 ℃), oil stains, and dust (such as metallurgical equipment rollers and mining machinery gearboxes), the performance degradation rate is less than 10%, and the service life can reach 3-5 times that of ordinary retaining rings.
Application scenarios
·Construction machinery: The piston positioning of the hydraulic cylinder of the excavator boom (axial force can reach 10000-20000N), and the retaining ring bears the continuous axial force pushed by high-pressure oil to avoid piston movement;
·Heavy duty machine tools: axial limit of CNC boring machine spindle bearings (high-frequency rotation+axial cutting force), elastic buffering of spiral structure can reduce bearing impact damage;
·Mining equipment: The bearing positioning of the crusher rotor shaft (to withstand the alternating axial force of material impact), high hardness materials resistant to wear, ensuring long-term stable operation;
·Wind power equipment: fixing the main shaft bearings of the generator (axial force fluctuates with wind speed, requiring the retaining ring to have both rigidity and trace elasticity), and adapting to outdoor environments with low temperature resistance.
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