Engine Crankshaft Manufacturing
The company has been specializing in engine crankshafts for decades and we have set up a special machinery park in Chongqing for manufacturing crankshafts, eccentric shafts, camshafts, cams and other components.
Engine crankshaft application areas:
-Automotive Engines
-Tractors
-Stationary Engines
-Industrial Engines
-Locomotives
-Marine Engines
-Large Commercial Vehicle and New Energy Vehicle Engines
-Rotor engines and light aircraft engines
-Electric Motors
-Agricultural Machinery
-Engines for off-road vehicles, sleds, racing cars, motorcycles, etc.
-Construction machinery, earth rammer crankshaft
-Garden machinery engines, etc.
The crankshaft is the most important part of the engine. It takes the force from the connecting rod and transforms it into torque that is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the combined effect of centrifugal force of rotating mass, periodically changing gas inertia force and reciprocating inertia force, which makes the crankshaft subjected to bending and torsional load. Therefore, the crankshaft is required to have sufficient strength and stiffness, and the journal surface needs to be wear-resistant, work evenly and have good balance.
SPP INDUSTRY is a professional crankshaft manufacturer and supplier, we provide precision crankshaft OEM service for China engine field, and have achieved the title of excellent supplier in many famous engine manufacturers.
What material is the crankshaft made of?
The forces on a crankshaft are extremely complex. It works under the combined effect of cyclically changing gas pressure, reciprocating inertia forces and their moments, and is subjected to huge bending and torsional alternating loads. It is also a slender, high-speed rotating part, so it needs to be strictly dynamically balanced, and neither bending nor twisting is allowed to exceed a certain value.
Therefore, crankshafts need to be made of very high quality materials and undergo a rigorous surface treatment process. After forging or casting, in order to improve the fatigue strength of the crankshaft and eliminate stress concentration, the surface of the journal needs to be shot blasted and the rounded corners need to be rolled; in order to improve the surface hardness of the journal, the surface of the journal needs to be high frequency quenching or nitriding treatment, and finally finishing. After this treatment, the crankshaft has sufficient fatigue strength and stiffness against bending and torsion, while the journal has a large enough pressure-bearing surface and wear resistance.
Engine crankshaft applications:
Crankshaft is one of the most important engine parts, its function is to bear the gas pressure from the piston connecting rod set into the crankshaft torque and external output, in addition, the crankshaft is also used to drive the engine's gas distribution mechanism and other auxiliary devices (such as generators, fans, water pumps, power steering pumps, balance shaft mechanism, etc.).
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Engineering Eccentric Shafts Machining
The company is one of the largest manufacturers of eccentric shafts, crankshafts, camshafts and cams in China. In our 24,000m2 precision grinding machinery park, we offer the full range of processes from forging to CNC machining to precision non-circular grinding.
Eccentric shafts are generally finished from hardened steel such as tool steel or nitrided steel. We can control the eccentric distance tolerance to around 0.004 and grind the finish to Ra 0.01um, which can better ensure the durability of the eccentric shaft.
SPP Industry Ltd.
In the 1990s, SPP Industry Ltd was one of the first manufacturers to establish CNC machining in China. The company has now established five major machine parks in China, with significant achievements in the areas of 5-axis machining, precision grinding & honing, gear machining, large parts machining, custom tungsten carbide and new material development respectively.
