Wheel Hub Air Tightness Testing Machine

The system delivers ±0.5% pressure control accuracy with 0.1 kPa resolution across a 0–6 bar range. Stepless pressure adjustment lets operators match test conditions precisely to each hub specification, eliminating the guesswork of fixed-step regulators and reducing false rejects.

A hydraulic clamping mechanism seals the upper and lower end caps of the wheel hub against high-strength gaskets. This produces a uniform, distortion-free seal that accommodates varying hub geometries without manual re-torquing, improving test repeatability and protecting finished surfaces from clamp marks.

Compressed air pressurizes the sealed hub while it is submerged in a water bath. Any leak — whether from a casting pore, weld defect, or machining error — produces visible bubbles at the exact leak location. This direct visual confirmation gives inspectors both a pass/fail result and actionable defect-location data for upstream process correction.

Operators can run the machine in full automatic mode via the integrated HMI touchscreen for consistent, high-throughput testing, or switch to manual mode for sample audits, R&D trials, or non-standard hub sizes. The touchscreen displays real-time pressure curves and test status, reducing operator training time.

The painted steel frame, stainless steel fittings, and corrosion-resistant test chamber are built for continuous duty in humid, wet-test environments (up to 85% RH). Integrated piping and a consolidated control panel minimize external connections, simplifying commissioning and daily maintenance.