Connecting Rod,Con-rod,Engine Part,Forged Connecting rod.

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.
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.

Spindle forging for RV

Detail Information
Forging materials: ASTM1035, ASTM1045, ASTM1021, ASTM1040, ASTM1320/20Mn2, ASTM1340/40Mn2, ASTM5120/20Cr, ASTM5140/40Cr, ASTM4119/20CrMo, ASTM4140/42CrMo, ASTM4135/35CrMo, ASTM4340/40CrNiMo,ST52-3/Q355/16Mn
Forging Method: Closed die forging, Warm forging, oRll ring forging.
OEM No: Customized
Weight: 1-100KGS
Dimension: Customized
Certificates: ISO/TS16949
Heat treatment: Normalizing,Quenching and tempering
Test: Magnetic Powder Defects Test, Hardness Test, Dimension Test

Automobile ball joint, steering knuckles,socket joint,forged joint.

A ball joint is used for allowing free rotation in two planes at the same time while preventing translation in any direction,including rotating in those planes. Combining two such joints with control arms enables motion in all three planes, allowing the front end of an automobile to be steered and a spring and shock (damper) suspension to make the ride comfortable.
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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.

Crankshaft forging

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.
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.

OEM Door Hinges

Forged hinge is a mechanical device used to connect two solids and allow relative rotation between them. The hinge can be composed of movable components or foldable forged items.

Forged hinges have high strength, good toughness, and are less possible breakage when collisions, providing a better connection between the car door and the car body.

The national standard for hinges requires that the door hinge can withstand a longitudinal load of 11.11KN and a transverse load of 8.89KN without detachment.

Gernerally,the raw material for forged hinges should be have good welding properties like Q355B.

Forged hinge production process.

Raw material lab testing Material cutting Medium frequency heating Forging by pneumatic hammer Advance shape forging Final shape forging Trimming forging Hot bending Hot correcting Shot blasting Flash and burr cleansing Shot blasting Logo marking by pneumatic Forging checking Cleansing and antirust Packaging.