CNC machining, CNC turning, CNC milling






    Inspection Standards

    To achieve 100% qualified products made from BTN Industry and continuously exceed customer expectations, we ensures high quality with every project.

    • Detailed raw material intake records.
    • Consistent calibration and labeling of inspection tools.
    • Well-equipped inspection department.
    • Root cause analysis of defective products.
    • Every quality inspector of BTN is professionally training learning new skills every month.
    • Designated areas for defective parts.

    Inspection Process

    During machining, the slow wear of cutting tools can have a subtle effect on the dimensions of the part, which makes it difficult to control the dimensions of the product during batch machining. Therefore, quality inspection of mechanical parts during production and prior to shipment is necessary to ensure that critical dimensions of the product meet the tolerance requirements.

    Our inspection process involves measuring and evaluating the dimensions and appearance of the product based on your drawings. For mechanical parts with high precision or for specific applications, in addition to dimensional compliance with tolerance requirements, the physical properties, surface finish, and sealing of the part must also meet design standards.

    Raw Material Inspection

    After the raw materials are purchased, the quality department checks the dimensions, hardness, and composition.

    In-ProcessQuality Check

    During the production stage, our workers will inspect the product dimensions to ensure that everything passes

    QC Inspection In Production

    When the machine is producing parts, our QC staff will inspect from time to time to ensure the quality.

    Full Inspection

    Batch production is completed and a full inspection is performed. Check if each dimension is qualified.

    Surface Finishing Inspection

    After the product is surface treated, QC needs to check if the surface meets the quality requirements.

    Inspection Before Packaging

    A final surface inspection is done on each product before packaging.

    Inspection Equipment

    Vernier Caliper

    Four functions: outside diameter, inside diameter, step, and depth measurement.

    Micrometer Caliper

    (Measuring length can be accurate to 0.01mm, measuring range for several centimeters.)

    Roughness Tester

    Measure the roughness of part surfaces: flat, beveled, and cylindrical surfaces, etc.

    Thread Gauge

    Internal and external threads: control the minimum and maximum size of the internal threads of the workpiece.

    2D Projector

    The images observed under a conventional microscope are transferred to a computer for various measurements.


    Calculation of various geometries and dimensions in a 3D measurable range by the software system of CMM.