The cylinder block is a component of the internal combustion engine. The functions of a cylinder block are many: crankshaft bearing, transmission of mechanical forces, fastening connections with the vehicle, and so on. The engine block is usually made of cast iron, although light metals are also used in some engines.

Especially high demands on surface quality are placed on the connecting surface to the top of the cylinder block. This must be perfectly and absolutely leak-proof. EHWA has been supplying metal-bonded honing tools for machining engine blocks with the highest precision requirements for years.

The piston rod is the connecting piece between the crankshaft and the piston. Nowadays, connecting rods are made of alloyed steel grades or sintered metals. For special applications, they are also made of titanium.