So, connecting rods also called a ‘con rod’, form the link, between the crankshaft and the pistons.
Consequently, transferring the inertial forces, to the crankpins on the crankshaft.
Also, the rod pushes and pulls the piston, into and out of the cylinder. And, the small eye, on the piston side of the rod, serves as a mounting for the piston pin.
A connecting rod, also called a ‘con rod’, is the part of the engine, which connects the piston to the crankshaft. Together with the crank, the con rod converts, the reciprocating motion of the piston, into the rotation of the crankshaft. The con rod carries the force, from the piston to the crankshaft. And,, it allows pivoting on the piston end and rotation on the shaft end.
The top of the connecting rod, that is secured to the piston is called, the small end . It won’t always have bearings. From the small end, the rod runs in an I-beam shaped profile down to the big-end.
The connecting rods shank, connects the small end of the rod, to the big end of the rod. The rod shank, normally has a double T cross section.
The big end, is the lower part of the rod.
Firstly, they are given break lines or laser notches and split into two parts. With the point of fracture, ensuring that the connecting rods, fit together precisely. They offer more advantages in terms of strength, cost and production accuracy.
Once assembled, the joint faces are barely visible. They fit together very precisely, thus allowing maximum force transmission.
All rods for automotive use, need to be lightweight. But, strong enough to withstand and transmit, the thrust from the pistons, to an engine’s crankshaft. Finally, connecting rods are available in, a variety of sizes and materials ideal for certain situations.
Common causes of con rod failure are, tensile failure from high engine speeds. Also, the impact force, when the piston hits a valve (due to a valve train problem), rod bearing failure (usually due to a lubrication problem, or incorrect installation of the rod.
So, most late model stock engines, use powder metal connecting rods. Because, they are inexpensive to manufacture, require minimal machining to finish. And, are adequate for, stock power levels and normal driving.
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