A210491000122 High-strength washers for steel structures Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000122 High-strength washers for steel structures Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

A210491000122 is a high-strength gasket for steel structures, exclusively designed for the SY1250H mining excavator steel structure connection scenario. This model has a large operating load and violent vibration. The steel structure connection parts need to withstand high pressure and strong impact, and the requirements for the strength, pressure resistance and anti-loosening of the gasket are extremely high. It integrates the core characteristics of high-strength alloy material, precision dimensional accuracy, corrosion resistance and vibration resistance, and high pressure sealing. It conforms to national standards and industry standards such as GB/T 1230-2006 “High-strength Gaskets for Steel Structures” and GB/T 3098.6-2014 [1][2][7]. It is matched with A210204000206 screws, 150106010111A double plunger pump set, pump room pipeline and whole machine steel structure components. Suitable for open-pit coal mines and metal mines, it can prevent malfunctions such as loose connections, surface wear, and seal failure. It is a key original equipment manufacturer (OEM) part that ensures the stability of the steel structure of the whole machine and continuous operation in the mine.

Core technical parameters

Model: A210491000122
Main body material: 45# high-quality carbon structural steel or 1.4112 stainless steel are both available.
Operating temperature: -30℃ to 150℃
Core working parameters: compatible with inner diameter 12-30mm (compatible with SY1250H steel structure connection specifications, conforming to GB/T 1230 standard size) [1][5], outer diameter 24-50mm, thickness 3-6mm, dimensional tolerance ±0.02mm, conforming to GB/T 3103.3-2020 fastener tolerance standard [2]; hardness 300HV-370HV (compatible with 12.9 grade high strength screws), meeting high pressure bearing requirements [1]; compression permanent deformation ≤12%, sealing pressure up to 40MPa, suitable for high pressure connection scenarios of the whole machine; adopts precision stamping + heat treatment integrated process, surface flatness ≤0.01mm, service life ≥8000 working hours.
Structural design: It adopts a flat ring structure with chamfered edges and a smooth, burr-free surface.
Shape and Size: Standard ring structure, regular shape, no burrs or cracks. Dimensions precisely match the SY1250H steel structure connection interface and high-strength screws. Inner diameter, outer diameter, and thickness are customized according to original factory assembly standards, suitable for steel structure connection parts with an inner diameter of 12-30mm.
Surface treatment: 45# steel version uses a double protection process of phosphating + Dacromet coating; stainless steel version uses a double treatment of mechanical polishing + passivation; salt spray resistance ≥800 hours.

Core functions and roles

As the “high-strength sealing and fastening gasket” of the SY1250H, its core function is to disperse the preload of high-strength screws, protect the steel structure connection surface, fill the connection gap, achieve a seal and prevent loosening, thus preventing loosening of steel structure connections, component wear, and oil leakage. It strictly matches the requirements of high-strength bolt connections, preventing bolts from crushing the gasket or connection failure. It can prevent connection loosening and seal failure caused by vibration, extend the service life of core components such as steel structures, screws, and pump units, reduce operation and maintenance costs, and work in conjunction with high-strength screws, steel structures, and hydraulic components to form a complete machine fastening and protection system. It is a key high-strength sealing component ensuring stable and efficient operation of mining steel structures.

Applicable Scenarios

Widely used in the steel structure connection parts of the SY1250H machine, it is compatible with A210204000206 high-strength screws, 150106010111A double plunger pump sets, and the connection between pump chamber pipelines and steel structures. It provides high-strength sealing, fastening, and pressure dispersion. It can also be used for large-scale mining steel structure connections of the same specifications. Suitable for 24-hour continuous heavy-duty and harsh working conditions in open-pit mines and earthmoving projects, it is an essential high-strength sealing and fastening accessory for equipment manufacturing, overhaul, after-sales maintenance, and bulk procurement. It can reduce downtime costs caused by loose connections and component wear, and improve the overall structural stability of the machine.

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1. Pump chamber piping
2. Return oil pipeline
3 SSY009114936 Cooling Pipeline
4. Traveling Pipeline
5 Valve body installation
6-turn pipeline
7. Boom piping
8. Boom and Bucket Piping
9 SSY008119457 Hydraulic oil tank assembly
10 12921534 Sheath
11 12921535 Sheath

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