The waveform inner retaining ring is an axial positioning component for holes formed by stamping spring steel (such as 65Mn) or stainless steel (such as 304) into a "wavy ring" shape, with a thickness of only 0.5-3mm. It achieves axial positioning through elastic deformation of the wavy structure. It is designed for scenarios with narrow space (installation groove depth ≤ 2mm), moderate axial force (500-3000N), and slight vibration/eccentricity (such as motor end caps, hydraulic valve blocks, small bearing chambers, etc.), which can fix components and buffer impacts to avoid rigid collisions.
Core strengths
1. Ultra lightweight design, suitable for extremely small installation space
The thickness is only 0.5-3mm, and the installation groove depth only needs to be slightly greater than the thickness of the retaining ring (such as 1mm thick retaining ring, groove depth of 1.2mm is sufficient), saving more than 50% of axial space compared to traditional retaining rings.
For example, in the bearing cavity of a micro motor with a diameter of 10mm, traditional spiral retaining rings require a reserved groove depth of 2mm due to a thickness of ≥ 1.5mm, while waveform retaining rings (with a thickness of 0.8mm) only require a groove depth of 1mm, freeing up more space for other components inside the motor and helping to miniaturize the equipment.
2. Elastic buffering to protect precision components
The wavy structure comes with an "elastic margin": when there is slight vibration or thermal expansion and contraction of components in the axial direction, the retaining ring can absorb the impact force through the small deformation of the waveform (≤ 0.3mm), avoiding wear or deformation caused by hard contact between rigid retaining rings (such as shaft shoulders and rigid snap springs) and components.
Especially suitable for precision transmission scenarios, such as servo motor bearing positioning (reducing the impact of vibration on bearing accuracy), hydraulic valve spool limit (buffering the impact caused by oil pressure fluctuations).
3. Easy installation, compatible with complex hole patterns
No special tools required: can be directly inserted into the groove of the hole by hand or simple tweezers (due to the thin and elastic material, it is easy to reset after deformation), with installation efficiency more than three times that of spiral retaining rings.
Adapt to non-standard hole patterns: Low requirements for hole wall smoothness (allowing for slight scratches), and can even be used in holes with shallow steps and local irregularities (wave structures can adapt to small size errors).
4. Corrosion and wear resistance, adaptable to multiple environments
Material options available:
65Mn spring steel (hardness HRC40-45, good elasticity, suitable for dry environments);
304 stainless steel (resistant to salt spray for more than 48 hours, suitable for humid and mildly corrosive environments, such as bathroom equipment and aquarium equipment);
316 stainless steel (resistant to seawater corrosion, suitable for outdoor and underwater equipment).
Application scenarios
·Precision electromechanical: positioning of bearing end caps for stepper motors and servo motors (compact space, requiring buffering of rotor vibration);
·Hydraulic and pneumatic: valve core limit of solenoid valves and directional valves (elastic buffering is required under oil impact to avoid valve core jamming);
·Small equipment: axial fixation of printer roller shaft and camera lens module (lightweight design does not affect the accuracy of equipment operation);
·Consumer goods: coffee machine water pump, vacuum cleaner motor component limit (stainless steel material can be selected for humid environments to extend service life).
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