Forging process

Forging is the initial key to bearing production. FNG bearings are made from high-quality alloy steel, precisely cut into billets, and heated to a specific temperature in a high-temperature furnace to soften the steel. Then, under a large forging press, the billets undergo intense pressure, shaping the bearing ring blanks. This process not only gives the rings their basic shape but also optimizes the internal structure of the steel, enhancing density and streamlining, thereby improving bearing reliability and service life, and reducing internal defects. Large bearings like those manufactured by FNG for wind power equipment can stably withstand enormous pressure and torque after forging.

Heat treatment process

After forging, the ring blank enters the heat treatment process. In a high-temperature furnace, the ring is heated to 800℃ - 900℃ and held for several hours to homogenize the internal microstructure of the steel, enhancing its hardness and wear resistance. Subsequently, rapid quenching is performed to cool and fix the ideal microstructure, followed by tempering to eliminate internal stress and improve toughness. For example, for high-speed and high-friction conditions in textile machinery, specially heat-treated FNG bearings can effectively resist wear and prolong the trouble-free operation time of the equipment.

Grinding process

After heat treatment, the rings require high-precision grinding to meet design accuracy and surface quality requirements. First, the outer diameter is precisely ground on an external grinder to ensure precise dimensions; then, the inner hole is processed on an internal grinder to ensure concentricity. Next, the end face of the ring is ground on a surface grinder to control thickness tolerances. Finally, the ultra-precision grinding process uses a special grinding paste and grinding disc to reduce surface roughness and enhance surface finish, making the bearing operate more smoothly and stably, reducing noise and vibration. In the field of precision machine tools, FNG's ground bearings can achieve micron-level precision operation.