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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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YN12B02407P1
for KOBELCO 200/210
Excavator Pin Shaft
1.High strength alloy substrate
Adopting 42CrMoA advanced alloy structural steel (carbon content of 0.38-0.45%, Cr and Mo element content of 1.2-1.5% and 0.15-0.25% respectively), the tensile strength is ≥ 1080 MPa, and the yield strength is ≥ 930 MPa, meeting the deformation resistance requirements of the maximum impact load (about 80-120 kN) of the hinge joint of the Shengang 200/210 excavator under full load.
Compared to ordinary 45 # steel pin shafts, its fatigue resistance performance has been improved by three times, making it suitable for heavy load conditions such as frequent excavation and rotation of Shengang models.
2. Precision heat treatment system
Dual medium quenching process: oil cooling followed by air cooling, with the core hardness controlled at HRC32-36, and the surface quenched to HRC58-62 through medium frequency induction to form a 2-3mm thick hardened layer, achieving an impact resistant structure with "outer hardness and inner toughness".
Low temperature tempering treatment (180-200 ℃ × 12h): eliminates quenching stress, improves dimensional stability, and long-term axial deformation ≤ 0.02mm/m.
3. Customized design of Shengang models
Tolerance matching: Referring to the three-dimensional model design of the KOBELCO hinge point of Shengang, the clearance between the shaft diameter and the hinge hole is controlled at 0.08-0.12mm (the original factory standard of Shengang is 0.15mm) to ensure zero shaking and reduce additional loads on the hydraulic system.
Optimization of oil passage: Axial penetration of oil passage with a diameter of 5mm, with 4 radial oil outlet holes (diameter of 2mm) at the end, combined with the original grease nozzle of Shengang, forming a circular lubricating film, improving lubrication efficiency by 40% and reducing dry friction wear.
Excavator Pin Shaft
1.High strength alloy substrate
Adopting 42CrMoA advanced alloy structural steel (carbon content of 0.38-0.45%, Cr and Mo element content of 1.2-1.5% and 0.15-0.25% respectively), the tensile strength is ≥ 1080 MPa, and the yield strength is ≥ 930 MPa, meeting the deformation resistance requirements of the maximum impact load (about 80-120 kN) of the hinge joint of the Shengang 200/210 excavator under full load.
Compared to ordinary 45 # steel pin shafts, its fatigue resistance performance has been improved by three times, making it suitable for heavy load conditions such as frequent excavation and rotation of Shengang models.
2. Precision heat treatment system
Dual medium quenching process: oil cooling followed by air cooling, with the core hardness controlled at HRC32-36, and the surface quenched to HRC58-62 through medium frequency induction to form a 2-3mm thick hardened layer, achieving an impact resistant structure with "outer hardness and inner toughness".
Low temperature tempering treatment (180-200 ℃ × 12h): eliminates quenching stress, improves dimensional stability, and long-term axial deformation ≤ 0.02mm/m.
3. Customized design of Shengang models
Tolerance matching: Referring to the three-dimensional model design of the KOBELCO hinge point of Shengang, the clearance between the shaft diameter and the hinge hole is controlled at 0.08-0.12mm (the original factory standard of Shengang is 0.15mm) to ensure zero shaking and reduce additional loads on the hydraulic system.
Optimization of oil passage: Axial penetration of oil passage with a diameter of 5mm, with 4 radial oil outlet holes (diameter of 2mm) at the end, combined with the original grease nozzle of Shengang, forming a circular lubricating film, improving lubrication efficiency by 40% and reducing dry friction wear.
