The Malossi crankshaft for the 100cc cylinder consists mainly of two half-shafts, forged from special steel, machined using high-precision CNC machines and then subjected to a thermochemical treatment consisting of carbonizing, hardening and cryogenic cooling in nitrogen. This process gives the half-shafts exceptional hardness and strength, essential for supporting the high power output generated by the 100cc cylinder.
The surfaces of the crankshaft are then ground using high-precision equipment, particularly the bearing shells, which have tolerances on the order of a few thousandths of a millimeter (-0.001 mm) and are lapped to achieve exceptionally low surface roughness. This level of precision ensures smooth operation and minimizes friction, extending the life of the motor.
The half-shafts are assembled to the connecting rods using special equipment, ensuring an extremely precise fit. The connecting rods, made from aerospace-grade steel using CNC technology, are thermochemically treated to achieve exceptional hardness and carcass-hardening thickness. The surfaces of the connecting rods' needle bearings are fully lapped to a very low roughness, which improves sliding and minimizes friction; for the same reason, the connecting rods are equipped with specific lubrication channels at the most stressed locations.
The balance of the crankshaft has been studied and implemented to optimize the performance of powerful engines, achieving a dynamic balance up to 16,000 rpm. This level of balancing ensures smooth and regular operation even at extremely high rotational speeds, making the Malossi crankshaft ideal for top-level use.
The needle bearings, mounted on the clutch of the crankshaft, are made with special profiled anti-roll bearings, selected with tolerances of a few thousandths of a millimeter. The cage, made of silver-coated steel, acts as a lubricating and wear-resistant element, ensuring optimum performance even under conditions of reduced lubrication.
