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Buying belts from China provides an excellent opportunity for saving costs and sourcing a large product selection, but it also introduces potential quality issues. This is because the quality can vary a great deal among the enormous number of suppliers. Buyers have been known to purchase belts that cracked prematurely, stretched the wrong amount, or failed while under regular stress. The good news, however, is that it is certainly possible to secure quality belts from Chinese suppliers-all you have to do is know what to look for. In this guide, we will walk you through concrete steps for evaluating a manufacturer's quality before you order.
Verify the Manufacturer’s Production History
The first factor that can contribute to a manufacturer’s quality is the level of experience it has in making belts. Building automotive belts requires technical knowledge in rubber compounds, fabric reinforcement, and precision molding. As one may expect, a factory that has made belts for a short time is more likely to produce an inconsistent product.
Find suppliers that have a production history of at least ten to fifteen years. For example, if a factory such as Xingtai Guanpin Rubber Products Co., Ltd (formerly Huayu Rubber Belt Factory which was founded in 1997) has twenty-six years of production experience, the manufacturer will likely have gone through many quality control problems and have corrected their manufacturing processes. New suppliers may offer lower prices; however, the risks associated with quality are substantially higher.
Inspect the Product Range and Specialization
When sourcing automotive belts from China, suppliers, look for a factory that specializes in belts, not one that makes belts alongside thousands of other rubber products. Look into what type of belts are being made. Manufacturers of quality EPDM PK belts, poly V-belts, alternator belts, fan belts, serpentine belts, timing belts, or toothed belts clearly know what they are doing. If the manufacturer says that they make literally everything-hoses, seals, gaskets, and belts-they are less likely to have precise control over the belt manufacturing process as opposed to a manufacturer with a specialized selection of belts. This also relates back to the importance of precise molds and production lines.
Request Material Specifications and Certifications
Quality belts start with quality materials. Before you finalize your order, you should inquire about the type of rubber compounds and the type of tensile cord that will be used in the belts. For a modern accessory drive, you will likely want EPDM material-the most heat, ozone, and crack-resistant material available today. For timing belts, you should ask for materials that are oil resistant and have a fabric coating on the teeth.
A reputable supplier will provide you with the material specification or certifications if necessary. They will tell you if they use new rubber or recycled rubber. If the supplier provides vague responses, then you should probably avoid ordering from them and keep looking for someone who is able to provide you with detailed material specifications. There are also certain industry standards when it comes to automotive belts, and serious suppliers will be sure to meet them.
Request Samples Before Mass Production
A sample order is the best way to be sure of a manufacturer's quality. You should first order a small number of the specific belts that you want to order in a larger quantity. After you receive your samples, closely inspect their physical appearance, quality, and consistency. Pay close attention to the cleanliness of the rib profiles on a PK belt. In addition, inspect the fabric tooth coverage on timing belts to make sure it’s evenly spread out. Install a sample belt in the real application when it’s possible. Listen for odd noises and check tension retention. You will then know if your sample belt works better than or at least as well as a known quality belt. A factory will readily supply samples if their quality is acceptable to you. If not, you should be suspicious about what their actual manufacturing quality is like.
Confirm Quality Control Processes
Be sure to ask how the manufacturer checks their quality. Are they checking raw rubber material before it's molded? Are they ensuring the cords don't overstretch when assembled? Are they checking dimensions on all mold cavities and performing dynamic testing on sampled belts from each production batch? Reliable manufacturers are aware that quality control is extremely important and they will likely have an established, and most of all, well-documented, quality control plan which you should ask about. Additionally, it is possible to arrange for third party inspectors to inspect goods prior to shipping out.
Build a Long-Term Relationship with a Single Supplier
Instead of searching for the next cheaper option, you will want to try to find a factory that provides quality goods consistently and then stick with them. If a factory knows that they will be working with you continuously, they will make sure that the production quality does not drop from order to order, and they will work harder to make your satisfaction with the product a primary concern. This type of relationship also has an advantage because if something goes wrong, the manufacturer you are committed to will work harder to ensure the quality is fixed before losing you as a customer. Xingtai Guanpin Rubber Products Co., Ltd specifically states on their website, the factory’s goals are to win customers’ trust and to develop friendly, long-term cooperative relations.
Final conclusion on purchasing automotive belts from China safely
It is very possible to find reliable automotive belts at reasonable prices if you know what you are looking for in terms of production history, material specs, samples, customization abilities, quality control process, and relationship with the supplier. By performing proper due diligence, you will be able to select a trustworthy factory and secure quality timing belts, PK belts, and toothed belts that will provide reliability to the customer.