In mining and quarry operations, the selection of Heavy-Duty Crawler Excavator directly determines hard rock crushing efficiency, material loading speed, and equipment service life. Choosing the wrong model may lead to inefficiency like "a small horse pulling a large cart" or frequent failures due to "large bucket capacity with small power". Hengwang has launched a series of Heavy-Duty Crawler Excavator targeting the three core needs of mines — hard rock crushing, large material loading, and continuous operation. Its scientific matching logic of "bucket capacity - power - track width" has become a benchmark for large excavator for sale mining.
I. Hard rock crushing: "Structural strength determines success" for Heavy-Duty Crawler Excavator
Mining hard rocks (compressive strength ≥ 150MPa) place extreme demands on the boom and arm strength of Heavy-Duty Crawler Excavator. The welded structure of ordinary models is prone to cracks under high-frequency impact, while Hengwang HW-1300 Heavy-Duty Crawler Excavator adopts an "integral castings + forgings" structure with no welded joints in key supporting parts, increasing the boom's fatigue strength by 40%. Its reinforced boom thickness reaches 80mm (20% thicker than similar models). In a hard rock crushing test at an iron mine in Shanxi, it operated continuously for 300 hours without deformation, while traditional models required shutdown for maintenance on average every 150 hours.
HW-520 Heavy-Duty Crawler Excavator also performs excellently. In its mine-specific chassis design, track rollers are fully protected, and the track uses high-strength double-tooth plates, increasing grip firmness by 30%. In basalt crushing at a quarry in Yunnan, the equipment attendance rate is 12% higher than that of imported models.
II. Large material loading: "Golden ratio of bucket capacity - power" for Heavy-Duty Crawler Excavator
Loading large materials (single piece weight ≥ 5 tons) requires Heavy-Duty Crawler Excavator to have a matching of "large bucket capacity + strong power". Hengwang's matching logic is: for every 1m³ increase in bucket capacity, the engine power needs to be increased by 30-50KW. Taking HW-1300 as an example, its standard bucket capacity is 8m³ (maximum 10m³), equipped with a Cummins QSK23 engine (567KW / approximately 770hp), which just meets the power demand for each cubic meter of material. In loading large raw coal at a coal mine in Inner Mongolia, the hourly loading capacity reaches 320 tons, 18% faster than models with the same bucket capacity but 50KW lower power.
HW-520 Heavy-Duty Crawler Excavator has a bucket capacity of 2.4-2.8m³, paired with a 280KW engine (approximately 380hp), suitable for loading medium-sized materials. In limestone loading at a quarry in Anhui, it achieves "only 4 buckets to fill a truck (30 tons)", with efficiency far exceeding that of small-power models of the same tonnage.
III. Continuous operation: "Hydraulic system reliability is king" for Heavy-Duty Crawler Excavator
Mining Heavy-Duty Crawler Excavator needs to withstand continuous operation for more than 16 hours a day, and the stability of the hydraulic system is crucial. Hengwang HW380-9 adopts electronically controlled positive flow technology, with a main pump displacement of 180*2ml/r. The system pressure loss is 15% lower than that of traditional hydraulic systems. In a continuous operation test at a gold mine in Shandong, the mean time between failures (MTBF) reaches 850 hours, 30% higher than the industry average.
The high-pressure and large-flow electronically controlled hydraulic system of HW-1300 is even known as a "heavy-duty benchmark". Its main pump displacement is adapted to the needs of large bucket capacity, and it adopts a three-stage filtration system. In mine environments with high dust concentration, the hydraulic oil cleanliness is maintained at NAS 8 level, effectively reducing valve group wear and ensuring smooth continuous operation.
IV. Matching logic of "bucket capacity - power - track width": Core formula for Heavy-Duty Crawler Excavator selection
lBasic matching formula:
Bucket capacity (m³) × 1.2 ≤ Engine power (KW) / 10
Example: HW1300 has a bucket capacity of 8m³, 8×1.2=9.6; power 567KW/10=56.7, which is much larger than 9.6, meeting heavy-duty needs.
lTrack width adaptation:
Track width (mm) ≥ Bucket capacity (m³) × 500
Example: HW520 has a bucket capacity of 2.8m³, 2.8×500=1400mm; actual track width is 3340mm, far exceeding the standard, ensuring no sinking during heavy loading.
Want to get a complete comparison table including detailed conversion of "bucket capacity - power - fuel consumption", local quotations, and parts guarantee? Contact us now, and note "mine selection" to receive it for free. Hengwang Heavy-Duty Crawler Excavator has passed ISO and EU CE certifications, and its reliability has been verified at mining sites in over 180 countries worldwide — whether for the cost-effectiveness needs of large excavator for sale mining or the professional considerations of heavy duty excavator selection, Hengwang Heavy-Duty Crawler Excavator can accurately match, increasing your mining operation efficiency by over 30%!
Choosing Heavy-Duty Crawler Excavator is essentially about "not pursuing excessive size, not making do", making every parameter serve mining productivity. Inquire now to enjoy exclusive customized mine plans, with worry-free service from model selection to after-sales support!
