Gear shafts serve as core components of gearboxes, reducers and transmission modules. They have complex structures including tooth roots, splines, keyways, relief grooves and radial oil holes. After gear hobbing, gear grinding and heat treatment processes, tooth gaps and shaft shoulder gaps tend to trap cutting fluid, lapping compound, fine metal chips, quenching oil and slight oxide scale. Traditional brushing and ordinary spraying only clean the outer surfaces. Micron-sized particles hidden in tooth root fillets and narrow gaps are difficult to remove. Residual contaminants after assembly will aggravate gear surface wear, cause abnormal meshing noise, increase transmission clearance and excessive temperature rise, directly reducing transmission accuracy and service life. This has become a major quality issue in the mass production and maintenance of transmission parts. Buck has developed a dedicated ultrasonic cleaning solution for gear shafts. Combined with vacuum and rotating spraying processes based on ultrasonic cavitation, it achieves precision cleaning across the entire tooth profile and steadily meets the cleanliness testing requirements of the automotive, construction machinery and precision reducer industries.

At the core of the solution is a high-frequency ultrasonic system adapted for gear shafts. The frequency can be flexibly adjusted according to workpiece material, module and surface hardness. The cavitation impact is gentle and controllable. It can penetrate deep into tooth roots and blind oil holes to strip stubborn oil contamination and embedded grinding debris, without damaging hardened tooth surfaces, coatings and precision fitting dimensions. To solve the problem of trapped air in gaps under atmospheric pressure which prevents full wetting of hidden areas, an optional vacuum ultrasonic module can extract air trapped in tooth grooves and micro-holes, allowing the cleaning medium to fully infiltrate all concealed positions and greatly improve cleaning uniformity. The complete process can be combined as required: ultrasonic rough cleaning, rotating spraying, multi-stage rinsing with deionized water, air knife blow-off, hot air drying or vacuum drying. Both water-based cleaning and hydrocarbon cleaning routes are available to balance environmental requirements and high cleanliness delivery standards.

Sinobakr uses dedicated hanging fixtures and positioning brackets for gear shaft cleaning. Workpieces are placed vertically to avoid collision between tooth surfaces, supporting mixed production of gear shafts of various specifications. The equipment is equipped with an intelligent PLC control system. Parameters including cleaning duration, temperature, ultrasonic power and spraying pressure can be saved in groups and recalled with one click during product changeover, ensuring high process consistency and reducing deviations caused by manual operation. The 316L stainless steel tank and filtration circulation system continuously separate oil and iron chips, extending the service life of cleaning fluid and lowering consumable costs. The unit can work independently or be integrated with heat treatment lines and assembly lines for automatic loading and unloading.

In the transmission component manufacturing industry, cleanliness directly determines the reliability of gear shafts. Buck’s gear shaft cleaning solution addresses the pain points of traditional cleaning methods, such as numerous blind areas, easy tooth surface damage and fluctuating cleanliness indicators. It reliably removes micron-scale contaminants, avoids early wear failures after installation, ensures stable transmission and qualified noise levels, and helps enterprises pass cleanliness inspections. It is widely applied in reducer manufacturing, automotive transmission parts production, and the processing and maintenance of gear shafts for construction machinery.