Views: 0 Author: Kun Tang Publish Time: 2026-08-26 Origin: YZH Machinery
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A pedestal rockbreaker boom system is often installed at the point where a crushing plant is most vulnerable: the primary crusher feed opening. When oversized rock bridges across the chamber, hangs above a grizzly, or blocks the feed path, the impact can extend far beyond one short interruption. Production stops, equipment is exposed to unnecessary stress, and personnel may be placed near a hazardous area.
The right boom system helps clear blockages quickly and remotely. However, selecting a system by hydraulic hammer size alone is a common and costly mistake.
A correctly sized pedestal rockbreaker boom system must match the crusher opening, material size, required working envelope, mounting arrangement, hydraulic capacity, and safety requirements of the site. It should reach every critical blockage point without creating interference with the crusher, hopper, grizzly, feed chute, or surrounding steelwork.
At YZH, we have specialized in custom-engineered stationary rockbreaker boom systems for mining and aggregate operations since 2002. This guide explains the practical factors buyers, plant engineers, and EPC teams should evaluate before selecting a boom system for a jaw crusher or gyratory crusher.
Quick answer: Size the boom system around the required working envelope and crusher layout first, then match the hydraulic hammer, pedestal, hydraulic power unit, and control system to the actual duty cycle and rock-breaking requirement.
A boom system that is too small may not reach the far side of the crusher opening or the highest point where bridging occurs. Operators may then be forced to reposition material indirectly, spend more time clearing a blockage, or work outside the intended range of the equipment.
A system that is unnecessarily large can also create problems. It may require a stronger foundation, interfere with access platforms, add excessive load to the supporting structure, or increase the overall capital cost without delivering additional operational value.
The objective is not simply to choose the largest available stationary rockbreaker. The objective is to select a reliable system that provides:
Full coverage of the crusher feed and blockage zone
Sufficient hydraulic hammer energy for the material
Safe operating angles for the tool
Adequate structural strength for the expected duty cycle
Easy maintenance access
Integration with the plant’s existing electrical and hydraulic infrastructure
Remote operation that keeps personnel away from the crusher opening
For a general overview of the equipment and its role in crusher productivity, see our guide: What Is a Rockbreaker Boom System? The Ultimate Guide to Mining Efficiency.
The crusher model is important, but it is not enough information to size a boom. Two plants using the same crusher model may need different boom configurations because their hopper geometry, grizzly arrangement, feed direction, platform elevation, and mounting locations differ.
Start by mapping the complete area where the hydraulic hammer must work. This normally includes:
The full width and depth of the crusher feed opening
The top of the feed hopper where rocks may bridge
The grizzly or scalping screen, if installed before the crusher
The area directly above the crusher chamber
The discharge zone or nearby area where oversize material may hang up
Any location that operators currently approach to clear blockages manually
The required work zone should be reviewed in both side view and plan view. A boom may appear to have enough reach in a two-dimensional drawing but still leave a blind spot when rotation limits, boom articulation, or surrounding structures are considered.
Before requesting a quotation, prepare the following site information:
Required Site Data | Why It Matters |
Crusher make, model, and opening dimensions | Establishes the initial scale of the application |
General arrangement drawing | Shows surrounding steelwork, platforms, hopper, and access routes |
Maximum feed rock size | Helps determine hammer capacity and reach requirement |
Typical rock type and compressive strength, if known | Helps match the hydraulic hammer to the material |
Photos and videos from several angles | Reveals site restrictions not always shown on drawings |
Proposed mounting position | Determines pedestal design and working envelope |
Available electric power | Supports hydraulic power pack selection |
Expected operating hours and blockage frequency | Determines duty-cycle and component requirements |
Required control location | Helps define wired, radio, or advanced remote-control options |
Providing this information early allows YZH engineers to recommend a system based on real site conditions rather than a generic model comparison.
The most important sizing criterion is the working envelope: the complete three-dimensional area the hydraulic hammer must reach safely and effectively.
A well-designed boom system must provide enough:
Horizontal reach to access the far edge of the crusher or grizzly
Vertical reach to break rocks at the top of the feed opening and inside the work zone
Depth reach to work toward the back of the hopper or crusher mouth
Swing coverage to serve the full operating area from the selected pedestal location
Tool angle flexibility to position the chisel correctly against the rock
Do not size the system based on maximum reach only. A quoted maximum reach may be measured at an angle that is not useful for actual breaking work. The hydraulic hammer also needs a stable, practical attack angle. If the tool works at an unsuitable angle, impact efficiency can fall and component wear may increase.
A responsible supplier should provide a boom working range drawing before the order is finalized. This drawing should show:
The boom pedestal location
Maximum and minimum horizontal reach
Maximum and minimum vertical reach
Swing range
Crusher, hopper, grizzly, and platform outlines
Potential interference areas
The recommended working positions of the hydraulic hammer
This engineering check is especially important for tight installations, underground grizzlies, mobile crushers, and large primary crushing stations.
Jaw crushers are common in quarrying, aggregate production, and primary crushing circuits. Their feed openings are usually rectangular, and bridging often occurs when flat, elongated, or oversized rocks span the chamber entrance.
For jaw crusher applications, the boom system must typically reach:
Across the full width of the jaw opening
Into the hopper or feed chute
Down to rocks lodged at the entrance to the crushing chamber
Around grizzly bars or a pre-screen, where applicable
A compact or medium-duty pedestal boom may be suitable for smaller jaw crushers, while large jaw crusher installations often require longer reach and a heavier hammer. The correct selection depends on the entire layout—not only on the jaw opening dimensions.
Gyratory crusher installations typically handle larger throughput and larger rock sizes. The boom system is often required to work over a wide dump pocket, deep crusher opening, or heavy-duty grizzly.
In this application, the equipment may need:
Greater horizontal and vertical reach
High structural strength for demanding duty cycles
A large hydraulic hammer for hard or oversize material
A robust pedestal and foundation arrangement
Advanced remote control to maintain distance from the hazardous area
The boom should be designed to work efficiently around the crusher’s feed geometry without risking contact with the spider, rim, feed chute, or structural steel.
For more background on these systems and their terminology, read: What Is a Boom Breaker? An Expert Guide to Rockbreaker Boom Systems.
The hydraulic hammer performs the rock-breaking work, but it must be matched correctly to both the boom and the material.
Key hydraulic hammer selection factors include:
Rock hardness and abrasiveness
Typical and maximum oversize rock dimensions
Required production response time
Hydraulic oil flow and operating pressure
Hammer operating weight
Tool diameter and tool type
Expected daily duty cycle
Boom lifting capacity and structural design
Very hard materials such as granite, iron ore, basalt, and some copper ores may require a different hammer configuration than softer limestone or weathered material. A larger hammer is not automatically the best choice. It must remain compatible with the boom’s lifting capacity, operating reach, hydraulic circuit, and mounting arrangement.
The hammer, boom, pedestal, power pack, hoses, and control system should be evaluated as one complete system.
The pedestal transfers operating loads from the boom system to the supporting structure. Its design is therefore critical to safety, stability, and long-term reliability.
Common mounting arrangements include:
Concrete foundation beside a primary crusher
Steel structure installation on a crushing platform
Mounting near a grizzly or ore pass
Compact mounting on a mobile crushing plant
Underground installation in a confined station
When reviewing the proposed mounting arrangement, consider:
Foundation size and concrete strength
Anchor bolt design
Static and dynamic loads
Available maintenance space
Clearance from handrails, walls, and conveyors
Hose routing and protection
Access for installation and future component replacement
YZH can support customers with custom boom and pedestal solutions based on site drawings and actual operational requirements. Learn more about our custom pedestal rockbreaker boom solutions.
A boom system needs a stable hydraulic supply to deliver reliable hammer performance. The hydraulic power pack should be selected according to the required oil flow, pressure, cooling demand, ambient conditions, and expected continuous operating time.
Important hydraulic power pack considerations include:
Electric motor power
System pressure and oil flow
Tank capacity
Oil cooling method
Filtration level
Cold-weather or high-temperature operating conditions
Hose length and pressure loss
Ease of maintenance
Control options should also reflect site risks and operating practices. Depending on the application, a system may use:
Fixed wired control station
Portable radio remote control
Cabin-mounted controls
Remote console operation for underground or high-risk areas
Site-specific automation or interlocking with the crushing circuit
Remote operation is particularly valuable when clearing blockages at a crusher, grizzly, or ore pass, where manual intervention can expose workers to falling rock, dust, noise, and unplanned material movement.
Tons per hour is useful context, but it does not define the required boom reach, working angle, or hydraulic hammer energy. Always assess the physical layout and maximum rock size.
A boom may reach a location in theory but not be able to position the hammer effectively there. Review the practical working envelope and tool angle.
Consider whether the mine plan, feed size, rock type, or crusher arrangement may change. A future change should be discussed during the initial engineering stage.
The foundation and pedestal must support dynamic loads generated during breaking. The mounting arrangement should be reviewed by qualified engineering personnel.
The hydraulic hammer, boom, power pack, hoses, and controls are interdependent. Buying them as an uncoordinated package can create performance and service problems.
Use this checklist before contacting a supplier:
Crusher make, model, and opening size confirmed
General arrangement drawing available
Maximum rock size recorded
Rock type and hardness identified where possible
Required breaking zone marked on drawings
Proposed pedestal location selected
Reach and swing coverage reviewed
Hydraulic and electrical supply confirmed
Control location and safety requirements defined
Maintenance access evaluated
Foundation or support structure reviewed
Expected operating hours and blockage frequency shared
The most useful information includes the crusher model, crusher opening dimensions, plant general arrangement drawing, maximum material size, rock type, photos, video, mounting location, available power supply, and desired control method. If you do not have every item, send the information available and our engineering team can help identify the remaining requirements.
In some layouts, yes. The feasibility depends on the distance between the grizzly and crusher, the vertical difference, the required swing range, and the hammer working angle. A working envelope drawing is necessary before confirming this configuration.
Hammer selection depends on rock hardness, oversize dimensions, required breakage speed, hydraulic supply, and boom capacity. A larger hammer should be selected only when it is compatible with the complete boom system and provides a measurable benefit for the application.
Yes. YZH designs stationary rockbreaker boom systems for specific crusher layouts and operating conditions. We can review your drawings, site photos, and operating requirements to recommend a suitable boom, hydraulic hammer, pedestal, power pack, and control configuration.
Remote control is strongly recommended where manual access near the crusher, grizzly, or ore pass creates a safety risk. The most suitable control type depends on operating distance, visibility, dust, underground conditions, and site safety procedures.
Routine maintenance typically includes lubrication, inspection of pins and bushes, checking hydraulic hoses and fittings, monitoring hydraulic oil condition, inspecting hammer tools, tightening fasteners, and examining structural components for wear or damage. A planned maintenance program helps protect uptime and equipment life.
Every crushing circuit is different. The best way to select a pedestal rockbreaker boom system is to evaluate the actual blockage area, crusher layout, material characteristics, and operating requirements together.
YZH provides custom-engineered boom systems, hydraulic hammers, hydraulic power packs, remote-control options, technical support, and spare parts for mining and aggregate applications worldwide.
Send us your crusher drawing, site photos, and application details to receive a tailored recommendation.
Request a Custom Quote from YZH
You can also explore more installation examples, equipment guidance, and mining application articles in the YZH News Center.
