1. Understanding Refurbished Parts
Distinguishing between part categories. Industry standards classify electronic components into three states: Original—clear labels, batch numbers, and logos; traceable to the manufacturer; verifiable production info; stable quality meeting OEM standards. “Loose New” (Bulk New)—unused; quality close to original;
sourced from excess inventory or discontinued projects rather than official channels. Refurbished—parts that have undergone secondary processing such as cleaning, polishing, re-marking, and re-taping; batch origins are unclear; prone to performance instability and early failure. Note: “Refurbished” describes the condition/quality of the goods, whereas “Counterfeit” refers to a mismatch between the model/brand and the actual item; these concepts must be treated separately.
2. Pitfalls of Small-Workshop Refurbishment
Risks associated with small-workshop refurbishment.
Industry warnings indicate that most refurbished parts on the market come from small workshops: they may replace only the obviously broken parts while leaving worn components untouched or using aftermarket substitutes;
they alter labels and casings—relabeling low-power motors as high-power, rebranding old series as new models, or repainting old housings to pass them off as nearly new; they assemble units from faulty parts—combining components from multiple broken motors into one (it may spin without a load, but internal parameters mismatch, causing failure under load); and they conceal histories of water damage or repairs—motors that were rewound after burnout suffer from significantly degraded insulation and performance, with a lifespan far shorter than standard used equipment. Such refurbished parts often last less than one-third as long as genuine OEM products; while they appear to save money initially, subsequent repair costs far exceed the initial savings.
3.
Standards for Legitimate Remanufacturing
Standards for certified, legitimate refurbishment.
According to national regulations, legitimate remanufacturing is subject to strict standards. Based on the *Interim Measures for the Standardized Management of Automotive Parts Remanufacturing* and the GB/T 45084 standard, remanufacturing enterprises bear primary responsibility for quality; they must establish inspection procedures for the entire remanufacturing process and formulate process specifications. They must apply the same standards as original new products for testing operational performance, safety, and cost-efficiency. Factory inspections, mandatory certifications, and warranty standards must match those of new products, and warranty and after-sales service levels must be no lower than those for new products. Remanufactured products must be clearly labeled as such.
Certified refurbished parts that meet these standards—having undergone disassembly, cleaning, and functional testing to OEM specifications—can achieve performance levels approaching those of new products.
IV.
Scope of Application
Guidelines for the appropriate use of refurbished parts: They are suitable for non-safety-critical applications—such as PLC components, HMIs, servo drives, variable frequency drives (VFDs), sensors, power supplies, relays, counters, and I/O cards. They are the most logical choice for discontinued equipment where original new parts are unavailable or lead times through authorized channels span several months. Conversely, safety-critical components—such as safety PLCs, emergency stop systems, protection relays, and motion control units—must be new; the liability risks involved render the price difference insignificant. For environments involving high-cycle, high-temperature, or high-load operations, components that have already logged operating hours will have a shorter remaining lifespan;
decisions should be made after carefully weighing expected service life against the price difference.
V. Verification Checklist
A checklist for verifying refurbished parts before purchase.
Industry experience suggests that purchasing refurbished parts requires verifying five key elements: model and revision details (full model number, revision number, or firmware info); operational test reports (evidence of functional testing; exercise extra caution with power electronics that cannot undergo actual load testing); warranty terms (certified refurbishments usually offer a 30-to-90-day seller warranty—often extendable—whereas parts without warranty or after-sales support should be avoided entirely); return policy (an agreed-upon return window); and actual product photos (showing the current condition). Legitimate motor refurbishment involves specific processes—such as using OEM-grade coils, replacing bearings and oil seals, varnish dipping and baking, dynamic balancing, and no-load temperature testing—ensuring the finished product’s performance is nearly identical to a new unit.
Conclusion
Should you buy refurbished automation components?
The verdict is: “Certified refurbished parts are worth buying, but those from small, unregulated workshops should be avoided.” Conceptually, refurbishment is a secondary processing stage—not the same as a counterfeit—though the primary risk lies in unclear batch origins. Regarding risks, small workshops often merely replace broken parts, alter labels or casings, cobble together faulty components, or conceal histories of water damage or previous repairs, resulting in a lifespan less than one-third of the original. Legitimate refurbishment, conversely, adheres to national remanufacturing regulations: performance must match the original new product, testing standards must be identical, clear labeling is required, and warranty terms must be comparable to new products. In terms of scope, certified refurbished parts are suitable for PLCs, servo drives, sensors, and discontinued spare parts for legacy equipment (offering 20%–50% savings), whereas safety PLCs, emergency stops, and protective relays must always be new.
Ultimately, the value of a refurbished part depends on who performed the refurbishment: certified units backed by inspection protocols, warranties, and test reports represent a smart purchase, while parts of unknown origin that rely solely on low prices to attract buyers are “ticking time bombs.”
