The shaft is one of the key components of a pelletizer, the quality of the piece and of the production process is very important.
The shaft is the central element of the rotor and is the heart of the press, it must be able to withstand the continuous vibrations and shocks generated by the pelleting process.
The shaft is built in hardened and tempered 38NiCrMo3 steel. Its head is protected by a thick chrome coating of about 0.2 mm as protection against abrasion and corrosion.
The quality of the turning and milling processes is important, it must guarantee not only the strict dimensional tolerances and the surface quality, but also the shape tolerances: circularity, concentricity, parallelism and perpendicularity.