Detail Information
Structure and function of connecting rod.

It is composed of three parts: big end of connecting rod,rod body and small end.Big end is separated, half of which is integrated with the rod body, and the other half is rod cap. Connecting rod cap is assembled with the main crankshaft journal by bolts and nuts.


Connecting rod connects the piston and the crankshaft, and transmits the force exerted by the piston to the crankshaft, transforming the reciprocating motion of the piston into the rotational motion of the crankshaft. It is one of the main transmission components of automotive engines, which transmits the pressure of the expanding gas of the piston to the crankshaft, transforming the reciprocating linear motion of the piston into the rotational motion of the crankshaft, in order to output power.


Raw Material and Forging.


Connecting rod materials are mostly made of high-strength SAE1045 carbon steel, ASTM5140/40Cr carbon steel, etc., through quenching and tempering treatment to improve cutting performance and impact resistance. The hardness requirements for SAE1045 carbon steel are HB217-293 and ASTM5140/40Cr is HB223-280.


Blank of connecting rods is generally produced by forging, and there are two forms of blank: one is the separate forging of the body and cap; Another method is to forge the body and cap integrated, and then cut apart when machining or use an expansion process to break them during the processing. In addition, to avoid defects of the blank, 100% hardness measurement and flaw detection are required.


What kind of connecting rod is a good connecting rod?

The working temperature of the connecting rod is 90~100 ℃, and the rotational speed is 3000~5000r/min. In order to ensure the smooth entry of connecting rod forgings to automated precision machining production lines and the assembly accuracy of processed finished parts in the engine, and to maintain their ability to withstand extremely high frequency of tensile and compressive alternating stress during high-speed operation, so that the crankshaft is always in a balanced state, it is required that the connecting rod forgings have high strength and fatigue lifetime.

China Metal Parts Forging Co., Ltd. is a leading custom metal parts manufacturer in China, with expertise in steel and alloy forgings. We serve over 15 countries worldwide, offering high-quality products at competitive prices. Learn more: https://www.creatorcomponents.com/

Detail Information
In an automobile, ball joints are spherical bearings that connect the control arms to the steering knuckles, and are used on virtually every automobile made. They bionically resemble the ball-and-socket joints found in most tetrapod animals.

A ball joint consists of a bearing stud and socket enclosed in a casing; all these parts are made of steel.The bearing stud is tapered and threaded, and fits into a tapered hole in the steering knuckle. A protective encasing prevents dirt from getting into the joint assembly. Usually, this is a rubber-like boot that allows movement and expansion of lubricant. Motion-control ball joints tend to be retained with an internal spring, which helps to prevent vibration problems in the linkage.

The "offset" ball joint provides means of movement in systems where thermal expansion and contraction, shock, seismic motion, and torsional motions, and forces are present.

On modern vehicles, joints are the pivot between the wheels and the suspension of an automobile. They are today almost universally used in the front suspension, having replaced the kingpin/link pin or kingpin/trunnion arrangement, but can also be found in the rear suspension of a few higher-performance autos. Ball joints play a critical role in the safe operation of an automobile's steering and suspension.

Many currently manufactured automobiles worldwide use MacPherson strut suspension, which utilises one ball joint per side, between the lower end of the strut and the control arm, with the necessary small amount of articulation at the top of the strut being usually provided by an elastomeric bearing, within which is a ball bearing to allow free rotation about the steering axis. So, there are commonly only two ball joints in the suspension, however there will be at least four (track rod ends and rack ends) in the steering linkage.

China Metal Parts Forging Co., Ltd. is a leading custom metal parts manufacturer in China, specializing in the manufacturing of steel and alloy forgings. We serve customers in more than 15 countries, delivering high-quality products at competitive prices. Learn more: https://www.creatorcomponents.com/

Detail Information
Advantages of Forged crankshaft

1、 High strength

Forged crankshaft is a high-strength component that needs to withstand the high pressure and high speed generated by vehicle engines. This high strength is due to the fact that the forged crankshaft undergoes multiple heat treatments and thermal deformation processes during the manufacturing process, resulting in refined grain size, improved mechanical properties, and better durability.

2、 Fatigue resistance

Forged crankshaft has certain elasticity and crack resistance, and is not easily broken during long-term high-speed rotation. Therefore, forged crankshafts have excellent wear resistance and durability in high frequency and high speed working environments.

3、 Wear resistance

Forged crankshafts are usually made of high-strength alloy steel, and their surfaces are usually processed by heat treatment, hardening treatment, and other processing methods to improve their wear resistance. This wear resistance can effectively reduce crankshaft wear during prolonged high-speed rotation, while also enabling the vehicle to better adapt to various working environments.



Raw Material for forged crankshaft.

1、 Material type of forged crankshaft

Forged crankshaft is an important component of an engine that requires high strength, wear resistance, and durability. Common forged crankshaft materials include carbon steel, alloy steel, and cast steel. Among them, carbon steel has low strength and is prone to fatigue cracks, making it unsuitable for long-term usage under high loads, while alloy steel has high strength but is prone to deformation and cracking, and has a high cost. It is generally used for high-performance vehicle models. Therefore, most engines use cast steel for forged crankshafts.


2、 Common materials for forged crankshaft


2.1. SAE1045 steel: It is carbon structural steel, which has high hardness and strength, cheap, and is widely used in ordinary engines.



2.2. ASTM5140/40Cr steel: It is alloy structural steel, with the addition of Cr element, which can improve hardness and strength, and has good ductility. It is suitable for mid to high level engines.



2.3. ASTM4135/35CrMo steel: It is alloy structural steel, added with Cr and Mo elements, and has excellent mechanical properties and heat treatment performance, suitable for high-performance engines.

China Metal Parts Forging Co., Ltd. is a premier Chinese manufacturer of custom metal parts, with a focus on steel and alloy forgings. We export to more than 15 countries, providing superior quality at competitive rates. Learn more: https://www.creatorcomponents.com/

Detail Information
Shift fork on the car gearbox, connected to the gear lever and located at the lower end of the lever, moves the middle gear wheel to change the input/output speed ratio.

If the shift fork on the machine tool is used for variable speed, it is mainly used in the control mechanism

It is to move the two engaged gears apart and then move one of the gears that can slide on the shaft to the other gear to obtain another speed. Namely, changing the position of the sliding gear on the lathe to achieve variable speed.

Alternatively, it can be applied in mechanisms that control the engagement and disengagement of clutches, thereby controlling lateral or longitudinal feed.

China Metal Parts Forging Co., Ltd. is a top custom metal parts producer in China, specializing in the production of steel and alloy forgings. We export to 15+ countries, offering high-quality products at competitive prices. Learn more: https://www.creatorcomponents.com/

Detail Information
A control arm is a suspension component that connects the frame of a vehicle to the steering knuckle, which holds the wheel and tire. The control arm allows the wheel and tire to move up and down as the vehicle goes over bumps and uneven road surfaces while maintaining the alignment of the wheel.

The control arm typically consists of two main parts: a ball joint and a bushing. The ball joint connects the control arm to the steering knuckle and allows the wheel to move in different directions, such as when turning. The bushing connects the control arm to the frame and helps to absorb vibrations and shocks from the road, reducing the transfer of these vibrations to the rest of the vehicle. This helps to improve the overall ride comfort and reduce noise and harshness inside the vehicle.

Control arms play a crucial role in the suspension system of a vehicle. They help to keep the wheels aligned and maintain proper tire contact with the road, which is essential for safety and stability. They also help to improve the ride comfort and handling of the vehicle by reducing the transmission of vibrations and shocks from the road to the rest of the vehicle.

China Metal Parts Forging Co., Ltd. is a leading custom metal parts manufacturer in China, specializing in the manufacturing of steel and alloy forgings. We serve customers in more than 15 countries, delivering high-quality products at competitive prices. Learn more: https://www.creatorcomponents.com/