Anhui KORBOR Machinery Co., Ltd.,, founded previously known as Ruian KORBOR Camshaft Manufacturing Co., Ltd. in 1999, was initially located in the automobile and motorcycle parts industry zone of Wenzhou, Zhejiang. It moved to Fuzhou, Fujian in 2005, and moved again to Anqing, Anhui in 2023, and was renamed Anhui KORBOR. Anhui KORBOR Machinery Co., Ltd., is China Wholesale DAIHATSU Car Camshaft Suppliers And DAIHATSU Car Camshaft Company. It is now located in Susong Economic Development Zone, covering an area of 28,000 square meters, with a plant area of 22,000 square meters, a registered capital of 11 million yuan (about US Dollar 1.4 million), and a total investment of over 100 million yuan. It is one of the top camshaft manufacturers in the country.
The camshaft is a key component in engine. We select high-performance alloys and use heat treatment processes, such as tempering, carburizing and quenching to significantly enhance the strength, hardness and wear resistance of the camshaft, ensuring performance in working environments.
With 25 years of innovation and experience, camshaft is our only focus. Anhui KORBOR Machinery Co., Ltd., is China Wholesale DAIHATSU Car Camshaft Company. We have efficient production lines and strict quality management systems, achieving high-precision mass production and ensuring that every batch product has the same quality. We follow the IATF16949:2016 standard, maintain the "zero defect" production concept, implement multi-level and all-round quality control for every link in the production process, and win the favor of the global market with high cost performance and stable quality. With customers all over the world, we have established the strategic cooperation with many brands.
Our team is born for higher standards, and continuously iterating, so that every process contains innovative power. At present, our product covers more than 800 automotive and 600 motorcycle camshaft models. KORBOR provides you with mature technology and diversified solutions to help customers achieve greater success.
Meanwhile, we are committed to environmental protection, ensuring a healthy and safe working environment for employees by reducing waste generation, and requiring all partners in the supply chain to comply with strict environmental protection and labor standards. Regularly audit suppliers to promote the implementation of sustainable production methods throughout the entire chain.
From blank casting to finished products, KORBOR provide 1-stop service for each customer with reliable quality and punctual delivery time. Every year, we deliver more than 2.3 million sets of products to global customers and serve the market with professional capabilities. KORBOR is not only your trusted supplier, but also your ideal partner in the field of automotive and motorcycle engine camshafts. Let us work together to create quality with exquisite craftsmanship.
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The relevant content of Anhui KORBOR Machinery Co., Ltd. does not mention the specific numerical standards for the machining accuracy of camshafts in the production process of DAIHATSU automobiles, but generally speaking, the machining accuracy of DAIHATSU automobile camshafts has the following common standards:
Dimensional accuracy
Diameter tolerance: The diameter tolerance of the camshaft journal is usually controlled between ±0.02mm and ±0.05mm. To ensure that the clearance with the bearing is within a reasonable range, for example, if the clearance is too large, it will cause the oil pressure to drop, affect the lubrication effect, and increase wear; if the clearance is too small, it may cause the camshaft to stagnate, or even damage the journal and bearing.
Cam profile dimension tolerance: The dimensional tolerances of the cam's lift, base circle diameter, etc. are generally between ±0.05mm and ±0.1mm. Because the cam profile size directly affects the opening and closing time and lift size of the valve, if the accuracy is not up to standard, the engine's valve timing will be inaccurate, affecting the engine's power output and fuel economy.
Shape accuracy
Cylindricity: The cylindricality error of the camshaft journal and cam is usually required to be controlled within 0.005mm to 0.01mm. Cylindricity that does not meet the standard will cause uneven contact between the camshaft and the bearing or valve tappet, accelerate wear, and reduce the service life of the camshaft and related components.
Straightness: The straightness error of the entire camshaft is generally required to be no more than 0.01mm to 0.02mm per 100mm length, and the full-length straightness error is no more than 0.05mm to 0.1mm. If the straightness deviation is too large, the camshaft will generate additional bending moment and vibration during operation, which will not only affect the normal operation of the engine, but may also cause fatigue fracture of the camshaft.
Position accuracy
Cam phase angle tolerance: The phase angle tolerance between cams is usually controlled at ±1° to ±2°. The accuracy of the phase angle is directly related to the valve timing of each cylinder of the engine. If the phase angle deviation is too large, the intake and exhaust time of each cylinder will be disordered, resulting in problems such as reduced engine power, increased vibration, and worsening emissions.
Position accuracy of keyway or positioning surface: The position tolerance of the keyway or positioning surface relative to the camshaft axis is generally ±0.05mm to ±0.1mm. This is to ensure the accurate installation position of the camshaft and components such as timing gears and sprockets, and to ensure the timing accuracy of the entire valve system.
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