Kato HD820 excavator reinforced and strengthened bucket connecting rod, forged alloy steel H-type connecting rod, special anti-fracture accessory

I. Core Material
The mainstream materials are 40Cr and 42CrMo alloy steels. For some heavy-duty scenarios, NM450 wear-resistant steel or high-strength quenched and tempered steel is used. It is formed through die forging process, followed by quenched and tempered heat treatment (quenching + tempering) to improve the balance between hardness and toughness. Key load-bearing parts will undergo additional surface strengthening treatments, such as nitriding and quenching, to enhance wear resistance and fatigue resistance.
II. Core Features
High-Tensile Strength and Crack Resistance: Tensile strength can reach 800-1000MPa, capable of withstanding the instantaneous impact force during excavation operations.
Wear Resistance and Fatigue Resistance: The material itself has excellent wear resistance, and the structural design conforms to the logic of force application, reducing fatigue loss from long-term operation.
Precise Adaptability: Processed according to the original factory dimensions of the machine model, with high hole precision. After installation, it connects smoothly with the dipper stick and bucket, without affecting the coordination of movements.
Structural Optimization: The reinforced version with ribs increases weld thickness or incorporates internal reinforcing ribs. The dedicated models for heavy-duty scenarios such as mines focus more on deformation resistance.
III. Usage Analysis
1. Suitable Working Conditions
Ordinary Working Conditions (Earthwork Excavation, River and Canal Dredging): Conventional forged alloy steel models can meet the requirements with higher cost-effectiveness.
Heavy-Duty Working Conditions (Mining, Crushing Operations): It is recommended to prioritize reinforced models or NM450 material models to avoid breakage and deformation.
Harsh Working Conditions (Humid, Corrosive Environments): Products with surface rust prevention treatment (galvanization, painting) should be selected to extend service life.
2. Usage Precautions
Overloading is strictly prohibited, such as forcibly excavating hard rock or large obstacles, as this can easily cause the connecting rod to bend or weld seams to crack.
Regularly check the wear condition of the connection pin shafts and bushings, lubricate them in a timely manner to avoid dry friction from exacerbating the wear of the connecting rod hole positions.
After operation, clean the mud and gravel on the surface of the connecting rod, check if there are cracks in the welds, and repair or replace them promptly if any problems are found.
3. Replacement Cycle
Under normal operating conditions, the service life can reach 8,000-12,000 hours with proper use; under heavy-load conditions, the cycle is shortened to 4,000-6,000 hours. If situations such as excessive hole wear, connecting rod bending, or weld cracking occur, replacement must be carried out immediately to prevent safety accidents.
English Version: Excavator Bucket Link - Material, Features & Usage Comparison Table

Category	Core Content
Core Material	Mainstream: 40Cr, 42CrMo alloy steel; Heavy-duty scenarios: NM450 wear-resistant steel/high-strength quenched and tempered steel; Process: Die forging + quenching-tempering heat treatment, surface hardening (nitriding/quenching) for key stress-bearing parts.
Core Features	High strength (tensile strength 800-1000MPa), impact resistance and fracture prevention; Wear-resistant and fatigue-resistant, strong adaptability (high hole position precision); Reinforced versions with ribs/thick welds for deformation resistance.
Applicable Working Conditions	General working conditions (earthmoving/dredging): Regular alloy steel models; Heavy-duty working conditions (mining/crushing): Reinforced models/NM450 material; Harsh working conditions (humid/corrosive): Anti-rust treated models.
Usage Notes	Prohibit overloading (e.g., forced excavation of hard rock/large obstacles); Regularly lubricate pins/bushings and clean surface impurities; Inspect weld cracks and hole wear, handle abnormalities promptly.
Replacement Cycle	General working conditions: 8000-12000 hours; Heavy-duty working conditions: 4000-6000 hours; Replace immediately if bending, cracking or excessive hole wear occurs.

Kato HD820 excavator reinforced and strengthened bucket connecting rod, forged alloy steel H-type connecting rod, special anti-fracture accessory Images