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When picking out a quality generator belt (also called an alternator belt), the better quality you can afford, the better performance your charging system will see. Lower quality belts will cause noise (squealing), slip (loss of alternator power) ,and eventually tear, leading to battery failure and leaving you stranded roadside with a dead battery. A quality generator belt will give you years of system integrity and silent operation with no surprises. Read on to find out what features a proper belt has.
Material Composition and Rubber Quality
The material that the belt is constructed from will determine the durability that your belt will possess. The better belts are constructed from newer EPDM (ethylene propylene diene monomer) rubber compound, which is remarkably durable and is very resistant to damage from heat and ozone, both of which will degrade lesser quality belts and cause premature failure. With any belt, observe the material; the surface should be smooth without pores, roughness or imperfections. You do not want glazed belts. Glazed belts will develop a sheen on the outer surface of the belt that is conducive to slippage.
Reinforcement and Rope Material
Because of the extreme stress that is put on the generator belt it is built with a high strength core, commonly constructed of high tech polymers such as polyester or aramid. These cord materials are able to maintain their length for decades under great stress, providing excellent strength and stability to the belt, keeping its tension optimal to prevent damage to either pulley in the system, thus preventing excess wear of either. Always examine the belt to see if you have the choice of cord materials that can provide greater strength or durability than a universal standard application.
Precision in Manufacturing and Profile Accuracy
The perfect seat in each groove is paramount to the proper functionality of a belt, slight variations of the belt profile could produce an unpleasant vibration, or sound, and increase the wear. For Poly V-belts(PK-belts), it is essential that all grooves are precisely manufactured to fit correctly into the pulley grooves, ensuring even load distribution across each V-rib. When ordering a belt, confirm that the manufacturer has many years of experience making this type of belt- a strong indication of quality.
Resistance to Cracking and Flex Fatigue
It will be necessary for any generator belt to flex and conform to a relatively small pulley numerous times over its service life, and poorer quality belts will break at to or at the roots of their ribs fairly quickly. While you cannot easily test this when first inspecting a belt, you can check whether the manufacturer uses proprietary formulas to improve flex resistance and reduce wear at the rib roots and back of the belt. It is best to buy from a manufacturer who will advertise how much flex fatigue resistance that they are able to engineer into their belts. Twenty five years of making belts suggests they have perfected this to the utmost extent, ensuring you of crack resistance under extreme conditions.
Customization Capabilities as a Quality Indicator
Although this is not really a feature it does show you that a belt manufacturer can deliver a custom manufactured belt made specifically to your specifications. This could include special logo applications, particular markings, a unique rubber compound for your unique situation and a cord material to meet high demands of power or longevity. This proves that a manufacturer can innovate and engineer any specialized application or need for specific types of generator belts.
Surface Finish and Rib Integrity
The physical appearance of any belt can give one clues into manufacturing quality. The back of the belt should have a smooth but not slick finish; an overly polished surface would likely cause slippage problems. Inconsistent shaping of the V-ribbing, lumps and voiding would prove that there is likely a mistake in the manufacturing mold.
Testing and Standards Compliance
The vast majority of high quality generator belts will likely undergo rigorous testing for tensile strength, durability while running hot, stress on various engine conditions etc. Unfortunately you cannot look at a belt and see how it tested, but quality manufacturers will list their product information as meeting or exceeding the established industry standards for such performance metrics. Twenty six years of operation indicates that this manufacturer will have all of the data required to know that their product meets demands.
Final Thoughts
Choosing a quality generator belt that keeps your vehicle running efficiently without premature wear comes down to three factors: the material, the tensile strength of the reinforcement, and the precision of its construction. Quality rubber components along with a properly made core and correctly shaped V-ribbing are crucial in having your system run at optimal capacity without squeal or slippage for hundreds of thousands of miles. Whether using a toothed or V-belt you must find a supplier that will custom manufacture their product for your precise need. Manufacturers that have been operating for twenty six years, such as Xingtai Guanpin Rubber Products Co., Ltd., can meet your exacting demands for quality. Your entire car will thank you for it.