Case Study: Jinan Changhao HWX1650 Silent Box-Type Hydraulic Breaker Tackles Hard Rock in Uruguay
A mining contractor in Uruguay faced severe challenges during quarry expansion: ultra-hard basalt rock. Standard hydraulic breakers could not handle the tough rock, suffering from low efficiency, quick wear and unstable performance, which delayed project progress. To solve these on-site issues for long-hour heavy-duty quarry work, Jinan Changhao Machinery supplied the reliable HWX1650 Silent Box-Type Hydraulic Breaker with strong impact power and durable structure.
1.Product Description & Engineering Architecture
The HWX1650 silent box-type hydraulic breaker is a heavy-duty rock-breaking attachment designed for 33–38 ton excavators, ideal for hard rock quarrying, heavy excavation and demolition. Unlike conventional open-type breakers, its fully enclosed box structure fully shields internal core components from external impacts, rock collision and harsh construction interference.
Its core parts (cylinder, piston, valve assembly) are housed in a thick high-strength steel box with high-density polyurethane buffers. This optimized structure offers three key practical advantages for heavy mining operations:
Acoustic & Vibration Isolation: Absorbs high-frequency impact energy, reducing decibel output at the site perimeter and insulating the excavator boom from recoil stress.
Debris & Dust Shielding: Prevents crushed rock fragments and fine particulate dust from infiltrating the upper seals and tie-rod assemblies.
Structural Rigidity: Enhances overall body stability during deep trenching or high-angle quarry face breaking.
2.Technical Specifications
| Parameter | Specification |
|---|---|
| Weight | 3149 kg |
| Oil Flow | 200‑260 l/min |
| Max Pressure | 250 bar |
| Operating Oil Pressure | 200‑220 bar |
| Frequency | 150‑300 bpm |
| Hose Size | 1 1/4 inch |
| Chisel Dia. | 165 mm |
| Chisel Length | 1600 mm |
| Suitable Carrier | 33‑38 ton excavator |
3.Core Engineering Selling Points
Advanced Metallurgy & Vacuum Heat Treatment: Core kinetic components—including the front head, cylinder, and piston—are forged from premium 20CrMo alloy steel. Precision vacuum heat treatment creates a hardened outer wear layer while retaining a ductile inner core, effectively preventing piston scuffing, internal cylinder scoring, and body cracking under extreme thermal loads.
High-Durability Chisel Design: The standard 165 mm wedge chisel is subjected to multi-stage surface hardening, offering resistance against bending, chipping, and thermal softening during prolonged high-intensity breaking.
Compatible Excavator Models for HWX1650 Box Type Silent Hydraulic Breaker (33-38 Ton):
SANY: SY335H, SY365H, SY375H
CAT: 330GC, 336GC, 336-NG
Doosan: DX340, DX350, DX380
Komatsu: PC350-11, PC360-11, PC390-11
Volvo: EC330, EC350, EC380
Hyundai: R330, R350, R380
Hitachi: ZX330-7, ZX350-7, ZX380-7
Kobelco: SK330-12, SK350-12, SK380-12
Complete Operational Package: Every HWX1650 ships direct from the factory ready for installation, including:
2 × Hardened 165 mm Moil/Wedge Chisels
2 × 1 1/4″ High-Pressure Steel Wire Armored Hydraulic Hoses
1 × Nitrogen Charging Kit
1 × Heavy-Duty Steel Service Toolbox with Complete Maintenance Tools
4.Primary Applications
Mining & Quarrying: Secondary boulder breaking, bench clearing, and direct excavation of high-density granite, basalt, and limestone reserves.
Infrastructure & Civil Engineering: Deep foundation rock trenching, highway mountain cutting, and utility channel excavation.
Demolition & Heavy Civil Works: Concrete deck removal, reinforced building foundation demolition, and bridge pier dismantling.
Noise-Sensitive Construction: Municipal projects, highway expansions near residential zones, and industrial sites requiring strict compliance with regional decibel regulations.
5.Field Performance & On-Site Feedback
Project Case: Basalt Quarrying in Uruguay, South America
In a aggregate extraction project in Uruguay, an HWX1650 unit was mounted on a 36-ton excavator to break hard basalt rock beds.
Thermal & Pressure Stability: Operating in continuous 10-to-12-hour shifts, the breaker’s hydraulic oil temperature remained stable within standard operating limits, eliminating performance fade caused by thermal fluid breakdown.
Wear Resistance: Inspection after extended initial operation showed smooth wear across the piston-to-cylinder interface, validating the effectiveness of the vacuum heat-treatment process in eliminating piston scuffing.
Client Feedback Excerpt:
“The HWX1650 delivered continuous impact power in our basalt quarry without overheating the excavator’s hydraulic system. The silent box housing significantly reduced vibration transmission back to the machine boom, and the components have shown zero signs of piston scuffing despite prolonged daily use.”
6.Contact Jinan Changhao Machinery
Jinan Changhao Machinery Equipment Co., Ltd. supplies high-performance hydraulic breakers, piping kits, quick couplers, and spare parts (pistons, chisels, seal kits) tailored for all major excavator brands.
To request detailed specifications, pricing, or customized mounting options for the HWX1650 hydraulic breaker, contact our engineering sales team directly.