A210204000465 Screw Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210204000465 Screw Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210204000465 is a screw with a special part number from Sany, designed specifically for the heavy-duty connection scenario of the SY1250H mining excavator. This model has a large operating load and violent vibration. The connection parts of the steel structure and hydraulic components need to withstand high pressure and strong impact, and the requirements for the strength, shear resistance and anti-loosening properties of the screw are extremely high. It integrates the core characteristics of high-strength alloy material, precision thread accuracy, anti-vibration and anti-loosening structure, corrosion resistance, oil resistance and wear resistance, and complies with national and industry standards such as GB/T 3098.1-2010 “Mechanical Properties of Fasteners Bolts, Screws and Studs” and GB/T 1228-2006 “High Strength Large Hexagon Head Bolts for Steel Structures” . It is matched with A210491000122 high-strength washers for steel structures, SSY007338266 main pump connection body, A210608000002 O-rings and pump room pipelines. Suitable for open-pit coal mines and metal mines, it can prevent faults such as stripped threads, loose parts, and connection failures. It is a key original part for ensuring continuous and safe operation of the whole machine in the mine.

Core technical parameters

Model: A210204000465
Main body material: 10.9 grade high-strength alloy steel (SCM435, 35CrMo) or 304 stainless steel are available as options. The material undergoes deep tempering and quenching heat treatment (quenching + tempering), resulting in a dense, impurity-free, burr-free, and crack-free material.
Operating temperature: -30℃ to 150℃, suitable for open-pit mines with large temperature differences between day and night and high-temperature working environments of hydraulic systems.
Key operating parameters: Compatible with M14-M32 (fitting SY1250H connection size), length 18-90mm, dimensional tolerance ±0.02mm, thread tolerance 6g/6H fit, conforming to GB/T 3103.1-2012 fastener tolerance standard; 10.9 grade alloy steel with tensile strength ≥1040MPa, yield strength ≥900MPa, hardness 33-39HRC; tightening torque 100-400N·m, anti-loosening performance meets heavy-duty mining requirements; adopts cold heading + thread rolling precision forming process, surface roughness Ra≤0.4μm, service life ≥8000 working hours.
Structural Design: Employs an external hexagonal structure; the thread features a triangular cross-section design; the screw head is chamfered, and the tail uses a tapered guide design for easy and quick screwing into the pre-drilled hole; built-in anti-loosening threads.
Shape and size: It features a standard cylindrical threaded structure, with a regular shape, free of burrs and cracks. The dimensions are precisely matched to the SY1250H steel structure, main pump connector, gaskets, and seals. Specifications and lengths are customized according to the original factory assembly standards.
Surface treatment: The alloy steel version uses a dual protection process of phosphating and Dacromet coating to avoid the risk of hydrogen embrittlement and improve corrosion resistance and lubricity; the stainless steel version uses a dual treatment of mechanical polishing and passivation to enhance corrosion resistance; salt spray resistance ≥1500 hours.

Core functions and roles

As a “high-strength fastening core connector” of SY1250H, its core function is to transmit high-strength fastening force, fasten the core components such as the steel structure of the whole machine, the main pump connector, and the hydraulic pipeline, disperse the pre-tightening force, protect the connection surface, realize vibration-resistant and anti-loosening connection, and avoid connection failure caused by local stress concentration . It can avoid hydraulic system failure and equipment stoppage caused by bolt breakage, stripping or component loosening, extend the service life of core components such as the main pump connector, pipeline, and seals, reduce operation and maintenance costs, and form a whole machine fastening protection system in conjunction with high-strength gaskets, main pump connectors, and hydraulic components. It is a key high-strength fastening component to ensure stable and efficient mining operations.

Applicable Scenarios

Widely used in the steel structure, main pump connection, and hydraulic pipeline connection parts of the SY1250H machine, it is compatible with A210491000122 high-strength washers for steel structures, SSY007338266 main pump connectors, A210608000002 O-rings, and pump room pipelines. It provides high-strength fastening, anti-loosening, vibration resistance, and fixed protection functions. It can also be used with large mining excavators of the same specifications. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthwork projects, it is an essential high-strength fastening accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce downtime costs caused by loose parts and connection failures, and improve the overall structural stability of the machine.

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