Aichi F507 Mobile Crane (truck Crane) Slew Bearings

Manufactured by zz Slewing Bearing, the F304 slewing ring is engineered to meet the high torque and heavy-load requirements of Aichi cranes. Using advanced design software and finite element analysis, zz ensures each bearing’s load distribution, gear engagement, and raceway geometry are optimized for long-term performance.

Aichi F303 Mobile Crane (truck Crane) Slew Bearing

Each bearing is forged from high-strength 42CrMo or 50Mn steel, followed by precision heat treatment to achieve consistent hardness and durability across all working surfaces. The raceway is finely ground to reduce friction, improving operational smoothness and extending service life. The internal gear teeth are machined using CNC hobbing technology to ensure accurate meshing and low noise during rotation.

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zz’s engineering team optimizes each bearing’s internal design to handle combined loads — including axial, radial, and overturning moments — which are essential for cranes operating in uneven or high-load environments. The slewing ring for Aichi F303 is made from high-quality 42CrMo or 50Mn alloy steel, processed through precision forging, quenching, and surface grinding to achieve maximum hardness and fatigue resistance.

Unlike standard bearings, zz Slewing Bearings for mobile cranes incorporate reinforced raceways and customized gear modules to ensure efficient torque transmission during heavy-duty lifting. The structure design ensures a perfect balance between rotational smoothness and load stability.

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