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Programmatic Comparison · Engineering Brief
ARJES Impaktor 350 EVO II vs Terex Ecotec TDS 820 — 2-hour cassette swap vs 24–48h hardfacing, hooklift mobility, monolithic shaft downtime penalty.
| Spec | ARJES Impaktor 350 EVO II | Terex Ecotec TDS 820 |
|---|---|---|
| Drive concept | Twin-shaft asynchronous low-speed hydrostatic, independent reverse | Twin-shaft slow-speed independent hydrostatic, bi-directional |
| Engine | Volvo Penta TAD 551 VE (Stage V) | Scania DC13 (Stage V) |
| Drive power (kW) | 200 | 331 |
| Drive power (HP) | 272 | 440 |
| Operating weight (kg) | 18 000 (hook-lift legal) | 27 500 (borderline heavy-haul) |
| Fuel consumption (l/h, avg) | 18 – 25 | 25 – 35 |
| Cutting torque per shaft (Nm) | 170 000 (asynchronous absorption) | 100 000 (hydrostatic, bi-directional) |
| Shaft / rotor type | Quick-change cassette (shafts + bearings + gears) | Monolithic fully welded twin shafts (2 m long) |
| Shaft maintenance downtime | 2 hours (cassette swap) | 24 – 48 hours (field hardfacing) |
| EU 40t GVW transport compliance | Standard (hook-lift truck) | Borderline (wide-load permit likely) |
| Tramp metal protection | Asynchronous anti-wrap with independent reversal | Independent hydrostatic bi-directional reversal |
| Hydraulic thermal limit (°C ambient) | +42 (CLEANFIX reversible cooling) | Standard (hydrostatic cooling adequate at 444 HP) |
| Setup time (hrs) | 0.5 (SCU auto-calibration, hook-lift) | 1.5+ (lowboy unload + setup) |
| Material | ARJES Impaktor 350 EVO II | Terex Ecotec TDS 820 |
|---|---|---|
| C&D waste / reinforced concrete | 44-66 ST/h | 33-55 ST/h |
| Waste wood / biomass | 17-28 ST/h | 17-28 ST/h |
| Commercial / industrial waste | 28-44 ST/h | 22-39 ST/h |
| Reinforced concrete (rebar ≥ 16 mm) | On-demand shred (asynchronous anti-wrap) | Bi-directional reversal ejects tramp metal |
Gate fees, landfill taxes, and electricity prices swing the verdict by ±30%. Run the live TCO model for your region to see real payback.
Both are slow-speed twin-shaft shredders, making this a direct class comparison. The Terex TDS 820 weighs 27.5 t with a 331 kW Scania DC13 engine, while the ARJES Impaktor 350 EVO II is ~18 t with a 200 kW engine. They are commonly shortlisted together for C&D and scrap processing where shaft maintenance logistics and transport compliance are decisive factors.
When the teeth on a monolithic shaft degrade from processing concrete and steel, the entire machine must be removed from production for 24–48 hours for specialized field hardfacing. Over a 10,000-hour lifecycle, with hardfacing required every few hundred hours, this compounds into hundreds of hours of lost production revenue. The HAZ from field welding also accelerates structural fatigue on shaft journals and bearings, leading to premature failure and costly replacement of the entire shaft assembly.
The ARJES Impaktor 350 EVO II delivers substantially lower TCO through its 2-hour quick-change cassette (eliminating 24–48h hardfacing downtime), hooklift transport compliance (zero permit costs per relocation), and lower specific fuel consumption. The Terex TDS 820's monolithic shaft penalty alone can consume 200-400+ hours of production downtime over a 10,000-hour lifecycle, representing a massive hidden cost that frequently exceeds initial fuel savings estimates.
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