329900297 thickened large washer XCMG XE2000 excavator spare parts

XCMG XE2000 Excavator Thickened Large Washer (Part No. 329900297): The Load-Bearing Foundation of Heavy-Duty Connections

In the global heavy-duty construction field of mining engineering, the XCMG XE2000 excavator, with its operating weight of 192 tons, powerful 810kW engine, and ultra-large bucket capacity of 10-14m³, has become a “heavy-duty weapon” in mining operations. From the high-altitude hard rock mining areas of the Democratic Republic of Congo to the open-pit coal mines of Australia, it has consistently conquered extreme working conditions with its stable and efficient performance. In its many critical connection points, the thickened large washer (part no. 329900297), as a “load-bearing buffer pad” in the fastener system, is a core small component ensuring the connection strength and stability of heavy-duty parts.

I. Crucial Responsibility for Heavy-Duty Connections

**Core Role of Load Distribution:** The bolts connecting heavy-duty components of the XE2000, such as the boom, stick, and slewing bearing, must withstand operational loads of up to hundreds of tons. The thickened large washer (329900297) increases the bearing area, evenly distributing the concentrated load of the bolts across the connection surface, effectively reducing pressure per unit area and preventing deformation or crushing of the base material due to excessive localized stress. Under the instantaneous impact conditions of hard rock excavation, it can improve peak load dispersion efficiency by over 40%, protecting the structural integrity of the connection base.
**Auxiliary Guarantee for Loosening and Sealing:** In addition to its core load-bearing function, this thickened large washer, with its precise flatness control, can tightly conform to the connection surface after the bolts are tightened, filling microscopic gaps and forming an auxiliary sealing barrier. In the high-dust, high-humidity environment of mines, it reduces the risk of dust and moisture intruding into the bolt threads through connection gaps. Simultaneously, the continuous surface contact friction helps improve the anti-loosening performance of the bolt connection, reducing the probability of loosening due to vibration.

II. Superior Performance Designed for Heavy-Duty Operations

High-Strength Material and Thickened Structure: To meet the heavy-duty connection requirements of the XE2000, the thickened large washer (329900297) is made of high-strength alloy structural steel, with a tensile strength exceeding 600MPa and a hardness controlled between 22-28HRC, combining high strength with good toughness. The washer thickness is more than 50% greater than that of ordinary standard washers, ensuring no plastic deformation under heavy-duty compression, and the flatness error is controlled within 0.05mm/m, ensuring uniform load distribution. After phosphating and blackening treatment, the surface can withstand salt spray testing for more than 600 hours, providing long-term resistance to corrosion in high-humidity mining environments.

Precisely Fitting Dimensions: XCMG engineers precisely designed the inner diameter, outer diameter, and thickness parameters of the washer based on the bolt specifications and stress characteristics of the XE2000 heavy-duty components. The inner bore features a rounded corner design to prevent scratching the bolt threads during installation; the outer diameter has been optimized to ensure sufficient load-bearing area while avoiding interference with surrounding components. This precise fit allows the washer to perfectly match the bolt and connecting surfaces, fully utilizing its load-bearing and distributing function.

III. Quality and Service Guarantee Under Rigorous Testing

Comprehensive Performance Limit Testing: Every batch of thickened large washers (329900297) undergoes multiple rigorous tests before leaving the factory: static compression test at twice the rated load (no permanent deformation for 30 minutes), dynamic load cycle test of 1 million cycles (simulating 8 years of operating conditions), high and low temperature impact test from -40℃ to 120℃ (500 cycles without cracking), and salt spray corrosion test (600 hours without rust spread). This series of stringent tests ensures the long-term reliability of the product under extreme operating conditions. In mining construction, where “details determine safety,” the XCMG XE2000 excavator’s thickened large washers (part number 329900297) provide reliable protection for heavy-duty connections with their small yet crucial load-bearing distribution function. Choosing these original factory-customized thickened large washers not only reduces the risk of connection component failure but also extends the service life of the equipment’s core structure, continuously creating value for mining production. Let XCMG’s original factory quality be your solid support for heavy-duty construction.

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318301766 pipe clamp assembly XCMG XE2000 excavator spare parts

1 318301771 1 PIPE CLIP
2 329900297 4 THICKENED LARGE WASHER
3 805046622 4 BOLT M10×70 GB/T5782-2000