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Programmatic Comparison · Engineering Brief
Side-by-side comparison of the ARJES Impaktor 1250 D twin-shaft shredder and Metso LT120 mobile jaw crusher — drive power, torque, throughput on concrete and asphalt, feedstock flexibility, and shaft-vs-jaw economics.
| Spec | ARJES Impaktor 1250 D | Metso LT120 |
|---|---|---|
| Drive concept | Dual-shaft low-speed hydrostatic shredder | Single-toggle high-speed jaw crusher |
| Engine | CAT C13 (Stage V) | CAT C9.3 (Stage V) |
| Drive power (kW) | 400 | 90 |
| Drive power (HP) | 544 | 122 |
| Operating weight (kg) | 37 000 | 25 500 |
| Cutting / crushing torque (Nm) | 240 000 (shaft) | ~30 000 (jaw compressive, published nominal) |
| Shaft / jaw speed (rpm) | 15–45 (variable) | 230 (fixed eccentric) |
| Drive service interval (hrs) | 500 | 500 |
| Wear-part swap time (hrs) | 2 (quick-change shaft cassette) | 8 (jaw plate change, weld-in cheek plates) |
| Setup time (hrs) | 0.5 (SCU auto-calibration) | 0.5 (hydraulic legs deploy) |
| Material | ARJES Impaktor 1250 D | Metso LT120 |
|---|---|---|
| Reinforced concrete (with rebar) | 60 – 120 t/h (rebar-tolerant) | 80 – 150 t/h (rebar must be removed) |
| Asphalt millings / pavement | 60 – 100 t/h | 100 – 180 t/h |
| Mixed C&D waste | 120 – 180 t/h | Not recommended (jaw damage risk) |
| Waste wood / biomass | 100 – 150 t/h | Not compatible (jaw crusher) |
| Car bodies / mixed scrap | 25 – 30 t/h | Not compatible (jaw crusher) |
The Impaktor 1250 D is rated for mixed C&D waste, waste wood, biomass, car bodies, and mixed scrap in addition to clean concrete and asphalt. The Metso LT120 jaw crusher is engineered for clean mineral aggregate only — introducing wood, steel, or mixed debris risks catastrophic jaw failure and warranty voidance.
The Impaktor 1250 D shreds reinforced concrete with embedded rebar directly — the hydrostatic drive stalls-and-recovers automatically on tramp metal. The Metso LT120 requires labor-intensive pre-stripping of rebar; running rebar through the jaw causes blockage, jaw-plate cracking, and expensive downtime.
ARJES quick-change shaft cassette completes a swap in ~2 hours. The Metso LT120 requires ~8 hours for jaw plate replacement including weld-in cheek plate service — a 4× difference that compounds across high-throughput operations running mixed feedstock with elevated wear rates.
The Impaktor 1250 D delivers 240 000 Nm of low-speed shaft torque against the Metso LT120’s ~30 000 Nm nominal jaw compressive force. This 8× torque advantage is what allows ARJES to recover from contamination events (rebar, brackets, engine blocks) without halting production.
For quarries and demolition contractors processing 100% clean concrete and asphalt with rebar pre-stripped, the Metso LT120’s high-speed jaw delivers 25–80% more throughput per hour. ARJES compensates with multi-feedstock flexibility that eliminates pre-sorting labor on mixed C&D yards.
They are both mobile primary reduction machines but use different reduction principles: the Impaktor 1250 D is a low-speed twin-shaft hydrostatic shredder (400 kW, 240 000 Nm), the Metso LT120 is a high-speed single-toggle jaw crusher (90 kW). They are commonly shortlisted together for high-volume C&D recycling yards where feedstock flexibility matters.
The ARJES Impaktor 1250 D. Its 240 000 Nm low-speed twin-shaft geometry tolerates embedded rebar and recovers automatically from tramp-metal stalls. The Metso LT120 jaw crusher requires labor-intensive rebar pre-stripping; running rebar through the jaw causes blockage, jaw-plate cracking, and warranty-voiding damage.
For quarries and contractors processing 100% clean concrete and asphalt with rebar pre-stripped, the Metso LT120 delivers 25–80% more throughput per hour at lower CAPEX. For mixed C&D yards handling wood, steel, and debris alongside concrete, the ARJES Impaktor 1250 D eliminates pre-sorting labor and unlocks 5 material families from a single machine.
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