Quality & Testing

Spring Mechanical Testing & Quality Control 




Consistent quality is the core of custom spring manufacturing. At Dowell Spring, 

we carry out full-range quality testing and inspection from raw material incoming check to finished product delivery. 

Our testing items cover: 

• Spring force & load test by force measuring machine 

• Dimension and tolerance inspection 

•Concentricity, perpendicularity and surface defect checking

• Fatigue cycle test, corrosion test on request 

• Material composition verification 




We follow strict inspection standards to control every production step. All test records can be provided for your quality audit. 

Whether you need standard springs or high-precision custom springs, our quality control system ensures stable performance and long service life. Send your specifications to get reliable spring solutions.