What is the typical maintenance schedule for the 1,200 mm rotor impact crusher?

Daily checks include inspecting the blow bars for wear and checking the hydraulic system for leaks. Every 250 hours, grease the rotor bearings and check the drive belt tension. Every 500 hours, inspect the pre-screen mesh and replace if worn beyond 10% of original thickness. Blow bars typically last 600–800 hours in limestone and 300–400 hours in hard rock; rotate them when the wear edge reaches 30 mm. The hydraulic oil should be changed every 2,000 hours or annually, and the filter every 500 hours. Following this schedule ensures the crusher maintains 95% availability and avoids unplanned downtime.

Can this crusher handle reinforced concrete with rebar?

Yes, the Tracked Mobile Impact Crusher is designed to process reinforced concrete. The 800 mm feed opening and 1,200 mm rotor can accept concrete lumps with rebar up to 32 mm diameter. The blow bars and liners are made of high-chrome alloy to resist abrasion from rebar, and the crusher's hydraulic gap adjustment allows the operator to set a product size that liberates the rebar for magnetic separation. However, it is recommended to use a pre-screen to remove excessive fines and to operate at a slightly reduced throughput (around 400 t/h) when processing heavily reinforced concrete to avoid peak loads on the rotor.

What is the required transport configuration and weight for road transport?

The crusher transports as a single unit on a low-loader, with dimensions of 15.5 m length, 3.2 m width, and 3.8 m height. The operating weight is 52,000 kg, which is within standard heavy-haulage limits in most regions. For transport, the feed hopper is folded hydraulically, and the discharge conveyor is retracted, reducing the length to 14.2 m. The tracks are not removed. A 3-axle low-loader with a 60-tonne payload capacity is required. The machine can be ready for operation within 30 minutes of arrival on site, with no crane required for assembly.

How does the pre-screen increase throughput in recycling applications?

The pre-screen, measuring 1,200 mm × 2,400 mm, removes fines (typically 0–30 mm) from the feed before it enters the crusher. In demolition recycling, this can bypass up to 30% of the total feed as fines, which would otherwise pass through the crusher without size reduction. By diverting these fines, the crusher's throughput is effectively increased by 15–20% because the crusher only processes material that requires crushing. Additionally, this reduces wear on the blow bars and lowers fuel consumption per tonne by approximately 10%. The pre-screen mesh can be changed to suit different cut points, such as 20 mm or 40 mm, depending on the desired product mix.

Tracked Mobile Impact Crusher

500 t/h Tracked Mobile Impact Crusher with 1,200 mm Rotor

The tracked mobile impact crusher is a self-propelled, heavy-duty crushing unit built for quarrying, construction demolition recycling, and mining applications. Its core is a 1,200 mm diameter rotor driven by a 450 kW diesel engine, delivering a throughput of up to 500 t/h with a maximum feed size of 800 mm.

Rotor Diameter

1,200 mm

Max Feed Size

800 mm

Throughput Capacity

500 t/h

Engine Power

450 kW

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How Does the 1,200 mm Rotor Impact Crusher Handle 500 t/h?

The tracked mobile impact crusher is defined by its 1,200 mm rotor and 450 kW engine, which together produce a throughput of up to 500 t/h. The crusher accepts feed material up to 800 mm, reducing it to a typical product size of 0–80 mm (adjustable via hydraulic gap setting). The unit weighs 52,000 kg and is mounted on a tracked undercarriage with a travel speed of 1.2 km/h, allowing it to move between stockpiles or quarry faces without a low-loader. The vibrating feeder with a 5 m³ hopper includes a pre-screen that removes fines before they enter the crusher, boosting net throughput by 15–20% in recycling applications. This specification is engineered for continuous duty in abrasive environments, with wear-resistant blow bars and liners rated for 600–800 hours between changes in hard rock.

Typical applications include primary and secondary crushing in limestone and demolition waste recycling, where the 800 mm feed opening handles large concrete lumps and asphalt slabs. In urban demolition, the tracked chassis and compact transport dimensions (15.5 m × 3.2 m × 3.8 m) allow access to confined sites, while the 450 kW engine provides enough power to maintain 500 t/h even when crushing reinforced concrete with rebar. The impact crusher's reduction ratio of up to 10:1 means fewer passes and lower operating costs compared to jaw crushers in recycling. For quarry operators, the 1,200 mm rotor delivers a cubical product shape with minimal oversize, reducing recirculation loads and screening costs.

Compared to smaller models in the range (e.g., 1,000 mm rotor, 350 t/h), this 1,200 mm version offers 43% higher throughput and a 20% larger feed opening, making it suitable for medium-to-large quarries and high-volume recycling yards. The 450 kW engine provides a 28% power reserve over the 350 kW unit, ensuring stable operation under peak loads. The track system features a 500 mm shoe width and a 3.2 m track gauge, giving a ground pressure of 0.85 kg/cm², which allows operation on softer ground without mats. This model is the preferred choice for contractors processing 200,000–500,000 tonnes per year, where uptime and fuel efficiency directly impact project margins.

Hydraulic gap adjustment allows product size changes from 20 mm to 80 mm in under 5 minutes, reducing downtime by 90% compared to shim-based systems.
Pre-screen with 1,200 mm × 2,400 mm mesh bypasses up to 30% of feed as fines, increasing crusher throughput by 15–20% in recycling.
Heavy-duty undercarriage with 500 mm track shoes and 0.85 kg/cm² ground pressure enables operation on uneven terrain and soft ground without site preparation.

Core Technical Features and Quantified Advantages

STEP 1

1,200 mm Rotor with 450 kW Drive

The 1,200 mm diameter rotor is fitted with four blow bars made of high-chrome alloy (HRC 58–62), each weighing 180 kg. Driven by a 450 kW diesel engine via a fluid coupling, the rotor achieves a tip speed of 38 m/s, delivering a reduction ratio of up to 10:1. This configuration produces 500 t/h of cubical product with a flakiness index below 15%, meeting EN 12620 standards for aggregates. The heavy-duty rotor bearings are rated for 100,000 hours L10 life, ensuring long-term reliability in abrasive applications.

STEP 2

Hydraulic Gap Adjustment System

The hydraulic gap adjustment system allows the operator to change the crusher's product size from 20 mm to 80 mm in under 5 minutes, without the need for manual shims. A dedicated hydraulic power pack with a 15 kW motor and 200 bar operating pressure provides precise control, with a digital display showing the gap in millimeters. This feature reduces downtime by 90% compared to traditional shim-based systems and enables quick adaptation to changing product specifications, such as switching from 0–40 mm base course to 0–20 mm asphalt aggregate.

STEP 3

Pre-Screen with 5 m³ Hopper

The integrated pre-screen measures 1,200 mm × 2,400 mm and uses a double-deck mesh to remove fines before they enter the crusher. In recycling applications, this bypasses up to 30% of the feed as fines, increasing net crusher throughput by 15–20% and reducing wear on blow bars. The 5 m³ hopper is lined with 10 mm wear-resistant steel plates (HB 400) and is fed by a vibrating feeder with a 1,000 mm wide belt, ensuring a continuous feed rate of up to 500 t/h even with cohesive materials.

STEP 4

Tracked Undercarriage with 0.85 kg/cm² Ground Pressure

The tracked undercarriage features 500 mm wide shoes and a 3.2 m track gauge, resulting in a ground pressure of 0.85 kg/cm², which allows operation on soft ground and uneven terrain without the need for mats or site preparation. Each track is driven by a 45 kW hydraulic motor with a two-speed gearbox, providing a travel speed of 1.2 km/h and a gradeability of 25°. The track frames are built from 20 mm thick steel and are designed to withstand the rigors of quarry and demolition sites, with sealed-for-life rollers and idlers reducing maintenance to greasing every 500 hours.