SSY007450352 Counterweight Assembly Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007450352 Counterweight Assembly Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

SSY007450352 is a counterweight assembly with a unique part number from Sany, compatible with the SY1250H 125-ton mining excavator. It integrates high-density cast iron counterweight blocks, a reinforced mounting base, anti-fall-off fastening components, and a wear-resistant protective coating. It is a core structural component for adjusting the machine’s center of gravity and improving operational stability. Primarily used in large open-pit coal mines and metal mines for excavation and topsoil stripping, it balances the overturning moment generated when the excavator’s working device extends through precise weight distribution and a reasonable installation layout. This prevents the machine from tilting or overturning during heavy-duty excavation and slewing operations, while also mitigating machine vibration and protecting core components such as the slewing device and platform. Suitable for mining conditions characterized by high temperatures, high dust, strong impacts, and large temperature differences, it is a key original equipment manufacturer (OEM) component for ensuring operational safety, improving efficiency, and reducing equipment wear in mines.

Core technical parameters

Model: SSY007450352
Main material: The counterweight is made of high-density cast iron (HT250) integral casting, with dense material, no sand holes, no cracks, compressive strength ≥250MPa, wear-resistant and corrosion-resistant; the mounting base is made of Q355B high-strength steel, which is reinforced by welding, and the weld is tested by UT+MT double non-destructive testing; the fastening components are made of high-strength alloy bolts.
Operating temperature: -30℃ to 55℃; no risk of cracking at low temperatures; stable material properties at high temperatures.
Key operating parameters: The weight of a single counterweight is adapted to the overall center of gravity design of the SY1250H machine. The total counterweight weight can accurately balance the overturning moment generated by the 585kN bucket digging force and the 495kN stick digging force, ensuring the stability of the machine during operation. The installation method is bolt fastening, using 4 M25 high-strength counterweight bolts to precisely connect with the slewing platform. Reinforcing bolts can be added as needed to improve the connection strength and prevent safety hazards caused by bolt breakage. The protection level is suitable for high dust environments in mines, with excellent sealing performance to prevent dust from entering the installation gaps and causing rust and jamming.
Shape and Size: The overall structure is an arc-shaped box; the specific dimensions perfectly match the mounting position at the rear of the rotary platform, with the length, width, and height precisely adapted to the overall machine layout; the mounting hole positions are within ±0.3mm of the preset base position of the rotary platform.
Surface treatment: The counterweight surface is treated with a three-layer protective coating of shot blasting, epoxy primer, and wear-resistant and weather-resistant topcoat, with a coating thickness ≥120μm, adhesion reaching GB/T 9286 Grade 1, and salt spray resistance ≥1000 hours; the mounting base surface is treated with a double protective coating of galvanized steel and anti-rust oil; the lifting lugs and bolts are treated with a blackening process.

Core functions and roles

As the “balancing core” of a 100-ton mining excavator, its core function is to balance the machine’s center of gravity through precise weight distribution and scientific installation layout. This counteracts the overturning moment generated by the working device during excavation and slewing operations, preventing the machine from tilting or tipping over and ensuring operational safety. In scenarios such as large open-pit mines and water conservancy projects, it not only improves the overall stability of the machine but also reduces machine vibration, minimizes the impact on core components such as the slewing device, slewing platform, and traveling body, and extends the machine’s service life. Simultaneously, the precise counterweight design optimizes the force distribution across the machine, improves excavation efficiency, and avoids problems such as operational jamming and equipment damage caused by center of gravity shift. It is a key core component ensuring the SY1250H excavator’s heavy-duty, continuous, and safe operation, working in conjunction with the slewing platform and slewing device to form the core system for stable operation of the entire machine.

Applicable Scenarios

Widely used in ore mining and topsoil stripping operations in large open-pit coal mines and metal mines, it is also suitable for large-scale water conservancy projects, port and wharf construction, and large-scale urban demolition and backfilling projects. It is particularly suitable for 24-hour continuous heavy-duty operations and harsh working conditions (high dust, strong impact, large temperature differences between day and night, and complex terrain), making it a core original equipment manufacturer (OEM) structural component for large-scale mining and the timely progress of large-scale projects. It is also compatible with commercial scenarios such as equipment overhauls, old machine upgrades, and counterweight replacement for accident vehicles. Its precise OEM compatibility and high reliability can significantly reduce modification costs and downtime, avoid safety hazards caused by mismatched counterweights, and improve the return on investment for projects.

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1 SSY008347233 Slewing Platform
2. Platform Supervisor Lu
5 SSY004911131 1250 Cab Assembly
6. Rotary Mechanism
8 SSY007450352 Counterweight Assembly
9 10275621 Adjusting shims
10 10450540 Washer
11 SSY004981300 Counterweight Bolt
18 Body panel assembly

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