I. Advantages of Used Equipment
There are three key advantages to used equipment. Industry experience highlights clear benefits: low price—often available at 30–50% (or even 10–20%) of the original cost; low depreciation—reselling the equipment when switching projects next year results in minimal financial loss;
and fast delivery—while new production lines take at least 3–6 months, used equipment can usually be delivered within 15 days. Furthermore, a budget of 200,000 might only secure a basic new model, whereas the same amount could buy a used unit with higher specifications and advanced features—or even a well-maintained machine with low usage hours if you get lucky.
II. Risks of Used Equipment
There are three major risks associated with used equipment.
Industry warnings highlight significant pitfalls: uncertain stability—sellers may conceal defects that only surface after installation, leading to endless repair issues;
lack of after-sales support—manufacturers promptly address issues with new equipment, whereas used units are difficult to repair, and finding compatible parts can be a struggle or even impossible; and downtime losses—while there is a 90,000 price gap between a 30,000 used machine and a 120,000 new one, the costs of downtime and repairs can quickly mount, with the value of delayed orders potentially exceeding the initial savings tenfold. The used market simply cannot provide the comprehensive stability and after-sales support found with new equipment.
III.
Caution Regarding Non-Standard Production Lines
Exercise extreme caution when purchasing used non-standard assembly lines.
Industry analysis suggests that non-standard, custom-built production lines are the least suitable candidates for second-hand purchase. Differences in factory dimensions, bottle shapes, and water sources make direct system compatibility difficult; retrofitting requires a comprehensive check for hidden faults, rewriting control software, and altering piping. The total cost in labor and materials often exceeds that of installing and commissioning new equipment. When combined with losses from downtime and wasted raw materials, any initial savings are quickly consumed. Conversely, standalone machines (such as brush-roller washers or packaging machines) carry manageable risks—parts can simply be replaced if they fail—making them viable for second-hand purchase. However, a complete processing line represents an integrated solution;
piecing one together from used components is ill-advised.
IV. Six-Step On-Site Inspection
A six-step inspection process for purchasing used equipment.
Based on industry experience, the on-site check involves: inspecting internal condition (open access panels to check screws; be wary of heavy rust or signs of rough disassembly that contradict the exterior’s appearance, as these may indicate a refurbished unit); examining lead screws and guide rails (rust, abnormal noises, or sticking during movement directly affect precision); listening to the spindle (a seized spindle costs at least a thousand to repair; normal operation should be smooth and quiet); checking the electrical cabinet (neat wiring suggests minimal past repair; a chaotic layout is an immediate “pass”); testing precision (leveling the machine, using a dial indicator to check four points on the worktable, and verifying 90-degree alignment across three axes and checking for backlash); and reviewing system logs (total operating time and alarm records; be cautious if cumulative operating time is excessive).
V.
Compliance and Documentation Verification
Verification of compliance and documentation.
In accordance with equipment management requirements, verify the “birth certificate” of the equipment before purchasing used units. Essential original manufacturing documents—including design specifications, certificates of conformity, and installation supervision reports—are mandatory; do not consider the purchase if the seller cannot provide them. Also, check for the equipment registration certificate; special equipment requires official registration, which is impossible to obtain if original documentation is incomplete. Finally, ensure material certificates and conformity certificates are present; if these are missing, the equipment should not be purchased, regardless of how low the price is. For imported used equipment, verify the “three-in-one” match of serial numbers (matching the factory plate, chassis, and system software) and be wary of rebadged refurbishments (look for signs of re-drilling or grinding around screw holes) or falsified manufacturing dates. Upon arrival at the factory, conduct Installation Qualification (IQ), Operational Qualification (OQ), and Performance Qualification (PQ);
these validation reports serve as a crucial safeguard during regulatory inspections.
Conclusion
Is it worth buying used non-standard assembly line equipment? The conclusion is: “Individual machines are worth it; approach entire lines with caution; exercise even greater caution with non-standard lines.” Scenarios where it is worth it: risks associated with individual machines are manageable (parts can be replaced if broken); machines aged 3–5 years have dropped to a reasonable price range; German and Japanese equipment offers superior materials and readily available spare parts; and it allows for high-spec equipment within a limited budget. Scenarios requiring caution: an entire assembly line represents a comprehensive solution, and used equipment cannot match the stability and after-sales support of a new system;
non-standard lines are often constrained by the original facility’s bottle types and water sources, making the cost of modification and adaptation often exceed that of installing and commissioning a new machine. Industry best practice dictates a six-step on-site inspection before purchase (checking internal condition, lead screws and guide rails, spindle noise, electrical cabinets, precision, and system logs) combined with document verification (manufacturing data, conformity certificates, material certificates, and serial number matching). Once the equipment arrives, perform IQ/OQ/PQ validation. Thorough inspection turns a used purchase into a bargain;
cutting corners turns it into a costly pitfall.
