BB600
YZH
Product Description
Jaw crushers work best when they receive a steady stream of rock that fits the feed opening; even a few oversize boulders can cause bridging across the top of the jaws or deep in the chamber. The YZH B Series fixed rock breaker boom system is installed so that the operator can swing the boom over the inlet, strike and fragment large pieces, then rake broken rock into the crushing zone, restoring normal feed without bringing in mobile machines.
Because the boom is fixed to a pedestal and powered by an electric-hydraulic unit, it offers consistent performance and low operating cost compared with using excavators for occasional breaking work.
Bridged and oversize rock at the jaw inlet
Large or slabby blocks can sit across the jaw opening or jam between the fixed and moving jaw, forcing shutdowns and risky manual clearing.
The B Series boom positions the hydraulic hammer directly over these pieces so operators can break them in place and push fragments into the chamber until the crusher is clear.
Uneven feed and choke cycles
When a jaw is starved by hang‑ups and then suddenly flooded when a blockage releases, wear and power draw become inconsistent.
By dealing with problem rocks as soon as they appear at the mouth, the boom system helps maintain a more uniform feed, improving crusher efficiency and product consistency.
Safety risks from manual or excavator-based clearing
Using bars or excavators at the edge of the jaw hopper exposes workers and machines to flyrock and unstable piles.
With the B Series fixed boom, operators manage oversize using joysticks or remotes from a safe position, keeping people away from the open crusher.
Information on fixed and B Series rockbreaker systems shows a common architecture with model ranges sized for jaw applications:
Pedestal and rotating upper frame
The lower frame is bolted or welded to a concrete or steel base next to the jaw crusher, providing a rigid foundation for the boom.
The upper frame (or swivel console) supports the lift boom and arm and typically provides around 170° hydraulic rotation, enough to cover the full width of the jaw inlet and adjacent rockbox.
Lift boom, arm and hydraulic breaker
Heavy-duty booms in the B Series use high-strength steel with reinforced welds and large pins, designed for continuous raking and breaking on hard, abrasive rock.
A hydraulic hammer sized for primary breaking—often in the mid-range weight classes for jaw crushers—is fitted at the arm tip, capable of breaking extremely hard and abrasive large rocks used in jaw applications.
Hydraulic power unit
Electric power packs in the approximate 37–55 kW range supply oil at up to about 20–25 MPa and 90–130 L/min (model dependent), enough to drive both boom functions and the breaker under continuous-duty conditions.
Centralized filtration and cooling help maintain oil quality and temperature, extending component life.
Control and safety system
Proportional joystick controls provide smooth, precise boom and breaker operation; some configurations allow remote operation away from the crusher platform.
Safety features such as emergency stop, pressure relief devices and interlock options support safe integration with the crusher’s control and lockout procedures.
B Series fixed rock breaker boom systems are suited to many jaw crusher roles described for YZH fixed systems:
Primary jaw crushers in aggregates and mining, where frequent oversize and bridging occur at the feed opening.
Stationary and semi‑portable jaw installations in quarries, where a fixed pedestal boom provides more precise breaking than excavators at the hopper.
Jaw crushers in recycling or industrial applications where tramp and large pieces periodically need controlled breaking at the inlet.
Boom reach in this class typically runs from about 3,000 mm on compact models up to around 10,000 mm on larger B Series units, allowing selection for both small and large jaw stations.
Although the product is described as a “B Series fixed rock breaker boom system for jaw crusher,” each station is configured around the actual crusher and plant layout:
Engineers review jaw opening size, hopper design, platform arrangement and rock size distribution to select a B Series boom model, pedestal position and hammer size.
The working envelope and 170° rotation are checked against plant drawings to confirm that all likely hang‑up points at the mouth, on any pre‑screen and in the rockbox are reachable.
Hydraulic, electrical and structural details are specified so the rockbreaker station can be installed with minimal disruption and tied into existing safety systems.
If your jaw crusher is losing production time to oversize and bridged rock, a YZH B Series fixed rock breaker boom system can turn the crusher mouth into a controlled, remote‑operated breaking station.
Share your jaw crusher layout, feed characteristics and capacity targets, and YZH will recommend a B Series configuration—boom, breaker, power unit and controls—tailored to your primary crushing needs.
