Connecting Rod Materials
Commonly used materials for connecting rods are C70 up to 42CrMo4, micro-alloyed steel and sintered metals. In specific ranges, as for example in the sports engine range, one finds special heat-treatable steels, or for weight saving factors even titanium. Sometimes conn-rods are even made of cast iron.
Manufacturing of Connecting Rods
The manufacturing of connecting rods varies, depending on whether they are produced in a large-scale production or a small-scale. With large-scale production, piston rods will be forged, molded by powdered steel or sintered, whereas piston rods in small series will be cut off from solid metal pieces.
Operation of Connecting Rods
Steam-engines, steamships or other steam engines run with piston rods. The piston rods are attached to the power units of steam engines, directly affecting the so-called driving rod by pushing the live axle of the locomotive.
According to the so-called principle of the reciprocating piston engine, the connecting rod transmits the force of the kinetic energy generated by the piston and the crankshaft onto the internal-combustion engine.
In a reciprocating piston compressor, the connecting rod transmits the rotary pushing force components of the crankshaft onto the working piston which moves in straight-line. The result is a compression ratio effect.