I. Page Introduction
The Crankshaft is the core power transmission component of the engine, known as the “heart” of the engine’s crankshaft-connecting rod mechanism. It plays a decisive role in converting the reciprocating linear motion of the piston (driven by fuel combustion) into rotational motion, which is then transmitted to the transmission system to drive the entire vehicle or equipment to operate. As one of the most critical and heavily loaded components in the engine, the Crankshaft endures high-frequency alternating loads, extreme pressure, and high temperatures during long-term operation, so its quality, precision, durability, and fatigue resistance directly determine the engine’s power output, operating stability, service life, and overall safety. Our Crankshaft is independently developed and manufactured with advanced technology, designed to meet the rigorous requirements of various engine types, including gasoline engines, diesel engines, hybrid engines, and high-performance racing engines, covering a wide range of applications such as passenger cars, commercial vehicles, construction machinery, agricultural machinery, marine equipment, and generators.
Unlike ordinary Crankshafts on the market, our product integrates high-quality materials, precision machining, and strict quality control, ensuring stable and reliable performance even in harsh operating environments such as high load, high temperature, and frequent start-stop. Whether it is daily commuting, heavy-duty transportation, or high-intensity industrial work, our Crankshaft can maintain excellent operating performance, effectively avoiding failures such as bending, deformation, or fracture caused by insufficient strength or precision. Adhering to the concept of “precision forging, durable quality, and efficient power transmission”, our Crankshaft has passed strict industry certifications and vehicle bench tests, winning widespread recognition from global customers. It not only meets the basic functional requirements of the engine but also helps optimize fuel efficiency, reduce vibration and noise, and lower exhaust emissions, fully complying with the global trend of energy conservation and environmental protection.
II. Advantage Highlights
1. Exceptional High-Strength & Fatigue Resistance: Our Crankshaft is made of high-quality materials, including forged alloy steel (40Cr, 4340, 20CrMnTi) and high-strength ductile iron, selected based on different engine performance requirements. After professional heat treatment, the Crankshaft has excellent mechanical properties, with tensile strength reaching 1300-1600MPa and yield strength over 1000MPa, which is 35% higher than that of ordinary cast Crankshafts. The optimized crankshaft journal and fillet design effectively disperses stress, improving fatigue resistance, and the service life of the Crankshaft can reach over 300,000 kilometers, ensuring long-term stable operation under high-frequency alternating loads.
2. Ultra-Precise Dimensional Accuracy: The Crankshaft is processed by advanced precision machining equipment, including CNC grinding machines, CNC lathes, and precision milling machines, with a fully automated production line to ensure machining precision and consistency. Key dimensions of the Crankshaft, such as journal diameter, crank radius, and parallelism, are strictly controlled, with dimensional tolerance within ±0.003mm and surface roughness of the journal as low as Ra≤0.4μm. This precise dimensional accuracy ensures perfect matching with the connecting rod bearing and main bearing, reducing friction loss, improving power transmission efficiency, and extending the service life of the Crankshaft and related components.
3. Excellent Wear & Corrosion Resistance: The surface of the Crankshaft is treated with advanced technologies such as nitriding, carburizing, and chrome plating, which significantly improve the surface hardness and wear resistance of the Crankshaft (surface hardness up to HRC 60-65). The nitriding layer forms a dense protective film, effectively preventing rust and corrosion caused by engine oil, high temperature, and moisture, ensuring the Crankshaft’s stable operation in harsh environments. The wear-resistant surface also reduces the frequency of maintenance and replacement, lowering use costs.
4. Stable Operation & Low Vibration: Our Crankshaft adopts an optimized structural design, including balanced weight configuration and streamlined crank arm design, which effectively reduces inertial force and vibration during operation. The dynamic balance accuracy of the Crankshaft reaches G2.5 level (far higher than the industry average G6.3 level), minimizing engine vibration and noise, improving driving comfort, and reducing wear on other engine components caused by vibration.
5. Wide Adaptability & Customization: Our Crankshaft covers a full range of models, suitable for engines with displacement from 0.8L to 60L and power from 15kW to 800kW, perfectly matching mainstream engine brands. We also provide customized Crankshaft solutions according to customer-specific needs, such as special engine models, high-performance requirements, and harsh operating environments. Our professional R&D team responds quickly to customization needs, ensuring the Crankshaft’s perfect compatibility with the engine.
III. Process Selling Points
1. Strict Raw Material Selection: We have established a strict raw material procurement and inspection system, selecting high-quality alloy steel and ductile iron from well-known domestic and foreign suppliers. Each batch of raw materials for the Crankshaft undergoes rigorous chemical composition analysis, mechanical property testing, and non-destructive flaw detection (ultrasonic testing, magnetic particle testing) to ensure no defects such as inclusions, cracks, or pores. The high-quality raw materials lay a solid foundation for the excellent performance and long service life of the Crankshaft.
2. Advanced Precision Forging Technology: The Crankshaft adopts advanced precision forging technology (hot die forging + cold finishing), which makes the internal structure of the material more dense, eliminates internal defects, and improves the mechanical properties and fatigue resistance of the Crankshaft. The forging process is controlled by intelligent equipment, with real-time monitoring of temperature, pressure, and forging speed, ensuring the consistency of the Crankshaft’s shape and size, reducing subsequent machining allowance, and improving production efficiency and product qualification rate.
3. Precision Machining & Finishing Process: The Crankshaft is processed by a fully automated CNC production line, with key processes (such as journal grinding, crank arm milling, and fillet polishing) equipped with online inspection equipment. This can detect dimensional errors and surface defects in real time, adjust processing parameters promptly, and ensure that each Crankshaft meets strict quality standards. The precision finishing process further reduces the surface roughness of the Crankshaft, improving the fit with bearings and reducing friction loss.
4. Professional Heat Treatment Process: The Crankshaft undergoes a strict and precise heat treatment process, including quenching, tempering, and nitriding, which is controlled by intelligent temperature control equipment with an error of ±2℃. This process effectively improves the hardness, toughness, and fatigue resistance of the Crankshaft, making it capable of withstanding high-frequency alternating loads and high temperatures. The uniform heat treatment ensures consistent performance of each part of the Crankshaft, avoiding local damage caused by uneven performance.
5. Strict Full-Process Quality Inspection: We have a complete quality inspection system covering the entire production process of the Crankshaft. From raw material incoming inspection to forging, machining, heat treatment, and final assembly, each link is equipped with professional inspectors and advanced testing equipment. Each finished Crankshaft undergoes comprehensive testing, including dimensional inspection, dynamic balance testing, fatigue testing, and wear testing. Only products that pass all tests can leave the factory, ensuring the stability and reliability of the Crankshaft’s quality.
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