Yes, we provide comprehensive product quality reports for every batch of gears we manufacture. Quality assurance is a fundamental part of our production process, and we believe that transparent, detailed documentation is essential for your approval and traceability. For each batch. For example grinding bevel gears, we perform rigorous inspections at multiple stages of production. After completing all inspections, we compile a complete quality report package for your review and records.
Our standard quality report for grinding bevel gears includes:
- Bubble drawing: This drawing marked number on every key dimension, and we will measure these key dimension accordingly to make sure no one is missed. And it also helps it easy to cross‑reference dimensional data with specific locations on the part.
- Dimension report: A detailed record of all critical dimensions. Each dimension is accompanied by the nominal value, actual measured value, tolerance range, and a pass/fail indication. Measurements are performed using calibrated CMMs, micrometers, and other precision instruments.
- Material certificate (MTC): Provided by certified raw material supplier, this certificate confirms the chemical composition, and mechanical properties (such as tensile strength and yield strength) of the gear blank material. It also references the relevant material standard (e.g., AISI, DIN, JIS, or GB) and includes the heat number for full traceability.
- Heat treatment report: For gears that undergo heat treatment (e.g., carburizing, quenching, tempering, or induction hardening), this report documents the process parameters: time‑temperature profiles, case depth, surface hardness, core hardness, and any distortion measurements.
- Ultrasonic testing (UT) and magnetic particle testing (MT) reports: UT is performed on the raw material or pre‑treated blanks to detect internal flaws such as voids, inclusions, or laminations. MT is applied to finished or near‑finished gears to locate surface and near‑surface cracks, grinding burns, or other discontinuities.
- Meshing report: The meshing test simulates the actual operating state of the product. We will check the contact pattern, backlash, and center distance through meshing measurements to ensure optimal performance. A contact pattern pic often attached.
- Accuracy report: Based on international standards such as AGMA, ISO 1328, or DIN 3962, this report lists the individual accuracy parameters: profile deviation, lead deviation, pitch deviation, runout, and cumulative pitch error. Each parameter is graded (e.g., AGMA Q8, ISO 6, etc.) and compared against the required class.
We believe that these comprehensive quality reports not only demonstrate our commitment to excellence but also give you full confidence in every gear you receive from us.