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+86-17692703999
+86-17692703999 No. 6, West Side Auxiliary Road,
Sunshine Street, Linxi County, Xingtai
City, Hebei Province
Sunshine Street, Linxi County, Xingtai
City, Hebei Province
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129-7770
loader bushing.
Material selection: Made of high-quality carburizing steel (such as 20CrMnTi or 20CrMo), with a carbon content controlled at 0.1% -0.25%, and added alloy elements such as Cr, Mn, Mo to enhance hardenability and fatigue resistance. Through carburizing quenching and low-temperature tempering treatment, the surface hardness can reach HRC 58-62, and the core maintains toughness (about HRC 30-35), forming a composite structure of "external hardness and internal toughness", which can withstand heavy impact and alternating loads.
Accurate size control: The specification of 129-7770 usually refers to the inner diameter x outer diameter x length (please refer to the equipment manual for details). Through precision machining processes such as CNC turning and grinding, the tolerance is controlled within * * ± 0.02mm. The clearance should follow the H7/g6 standard * * to ensure proper fit with excavator pins, ear plates, and other components, avoiding abnormal wear or vibration caused by loose installation.
Corrosion resistance treatment: For harsh working conditions such as humidity, salt spray, or chemical substances, the surface of the liner can be coated with Dacromet or plated with hard chromium. The Dacromet coating is composed of zinc, aluminum sheets, and chromate salts, with a salt spray resistance test of over 1000 hours and no risk of hydrogen embrittlement. It is suitable for coastal or high humidity environments; The thickness of the hard chrome plating layer is usually 0.02-0.05mm, which combines corrosion resistance and friction reduction performance.
Wear resistant strengthening: A 0.8-1.2mm hardened layer is formed on the surface of the liner through high-frequency quenching or carburizing processes, significantly increasing hardness, further reducing friction coefficient, and reducing direct metal contact wear between the pin shaft and the liner. Some products adopt Laser Surface Texture (LST) technology, which optimizes the lubrication flow field through micro pits or grooves design to improve wear resistance under boundary lubrication conditions.
loader bushing.
Material selection: Made of high-quality carburizing steel (such as 20CrMnTi or 20CrMo), with a carbon content controlled at 0.1% -0.25%, and added alloy elements such as Cr, Mn, Mo to enhance hardenability and fatigue resistance. Through carburizing quenching and low-temperature tempering treatment, the surface hardness can reach HRC 58-62, and the core maintains toughness (about HRC 30-35), forming a composite structure of "external hardness and internal toughness", which can withstand heavy impact and alternating loads.
Accurate size control: The specification of 129-7770 usually refers to the inner diameter x outer diameter x length (please refer to the equipment manual for details). Through precision machining processes such as CNC turning and grinding, the tolerance is controlled within * * ± 0.02mm. The clearance should follow the H7/g6 standard * * to ensure proper fit with excavator pins, ear plates, and other components, avoiding abnormal wear or vibration caused by loose installation.
Corrosion resistance treatment: For harsh working conditions such as humidity, salt spray, or chemical substances, the surface of the liner can be coated with Dacromet or plated with hard chromium. The Dacromet coating is composed of zinc, aluminum sheets, and chromate salts, with a salt spray resistance test of over 1000 hours and no risk of hydrogen embrittlement. It is suitable for coastal or high humidity environments; The thickness of the hard chrome plating layer is usually 0.02-0.05mm, which combines corrosion resistance and friction reduction performance.
Wear resistant strengthening: A 0.8-1.2mm hardened layer is formed on the surface of the liner through high-frequency quenching or carburizing processes, significantly increasing hardness, further reducing friction coefficient, and reducing direct metal contact wear between the pin shaft and the liner. Some products adopt Laser Surface Texture (LST) technology, which optimizes the lubrication flow field through micro pits or grooves design to improve wear resistance under boundary lubrication conditions.
