US-based manufacturer of screening and crushing products IRock reports that its newly developed Magnum primary crusher, which is a high-performance four-bar impactor with heavy duty components, increases the reliability, efficiency and precision of crushing applications.

IRock says the primary crusher, which comes in three different sizes, is equipped with CAT Acert Tier 3 engines, which allow the crusher to be more flexible and efficient.

The magnum impact crusher is ideal for operators who require a primary crusher or for those who run screening and crushing operations and need the flexibility to perform two separate jobs simultaneously, according to IRock.

The Magnum, which is available in Magnum 15, which can crush 350 t/h, the Magnum 20, which can crush 500 t/h and the Magnum 30, which crushes 650 t/h, is ideally suited for crushing in quarry rock, demolition debris or recyclable material applications. “It is also ideal for operations that require a primary crusher or for companies that run a screening and crushing operation,” the company states.

Each unit includes three auxiliaries for the operation of transfer or stacking conveyors. Additionally, each unit is equipment with a PT Tech clutch, which decreases power loss and increases fuel efficiency. IRock magnum crushers are highly portable and operators can enhance the ease of transport with the optional patented Hydraset Hopper.

The Hydraset Hopper operates from an internal power pack, which allows the hopper to be easily detached and placed on a trailer in a matter of minutes without a lifting device. The hopper is a block, which moves items into and out of containers.

This is crucial with the Magnum 30, which cannot be transported without the removal of the hopper, because of weight limitations. After relocating, the hydraulic outriggers make for fast and easy set-up.

A vibrating feeder with a heavy-duty two-step tapered grizzly removes fines and allows only large materials into the crusher. The feed size ranges from 1.015 mm x 810 mm to 1.420 mm x 1.090 mm.

Hydraulically adjustable aprons, with three-stage crushing on IRock’s impactor crushers, allow better control over sizing. The four bar impactor design offers maximum material reduction that minimizes wear and enhances performance and production.

The mobile crusher also features IRock’s exclusive rock box - an innovative alternative to discharging chutes found on similar units. The rock box uses a shelf system with abrasion-resistance wear bars, which allows crushed material to build up and act as a wear liner, effectively reducing maintenance. It also incorporates specialized AR40 steel plat liners for each material transfer point, which provides better durability compared to rubber liners used by other crusher manufacturers.