quality-control

Each batch of goods must be strictly tested, if that don't meet the quality standards are not allowed to delivery.

Testing items: hardness, tensile strength, rotational strength, balance, density, aperture size, appearance defects, abrasive particle size, heat resistance, impact resistance, static unbalance, bending strength, corrosion resistance, cutting/grinding test, noise testing, vibration level, etc.

Detailed records must be kept from the raw materials enter the factory to the production and packaging process, ensuring product traceability.