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Programmatic Comparison · Engineering Brief
Side-by-side technical comparison: 500 kW electric VFD vs 400 kW Cummins diesel, 480k EUR vs 675k EUR energy cost over 10,000 h, and single-shaft rebar wrapping / gear shear failure mode vs ARJES asynchronous twin-shaft self-cleaning.
| Spec | ARJES Impaktor 1250 E | TANA Shark 4400 |
|---|---|---|
| Drive concept | Twin-shaft asynchronous, independent hydrostatic / electric VFD per shaft | Single-shaft + stationary counter-knife, mechanical planetary |
| Prime mover | Dual 250 kW asynchronous electric motors with VFD | Cummins QSM11 diesel (Stage V) — also Komptech CAT C9.3 440 kW |
| Drive power (kW) | 500 | 400 |
| Operating weight (kg) | 35 000 – 40 000 | 32 000 (TANA) / 28 000 (Komptech) |
| Transport width (m) | 2.55 (standard lowboy) | 2.90 – 3.00 (oversize permit) |
| Energy cost over 10,000 h (EUR) | 480 000 (320 kW·h avg × 10,000 h × 0.15 EUR/kW·h) | 675 000 (45 l/h × 10,000 h × 1.50 EUR/l diesel) |
| Energy cost delta (EUR) | – 195 000 | + 195 000 (≈ 30% more expensive) |
| Rebar / wire wrapping behaviour | Asynchronous dual-shaft — shears wire, self-cleans, no wrapping | Single-shaft acts as spool — wire wraps, side seals extruded, bearing invasion |
| Tramp metal (rail / I-beam) response | Independent reverse per shaft, hydraulic damping absorbs peak | Rotors jam between shaft and counter-knife — planetary gear shear / hydraulic motor burst |
| Output fraction control | Cassette swap (sync ↔ async mode via gearbox on Impaktor 1000) | Adjustable counter-screen (TANA strength for RDF, but deforms on reinforced concrete) |
| Cutting unit service (hrs) | 4 – 6 (quick-change cassette) | 24 – 72 (bolted knife change or hardfacing) |
| Material | ARJES Impaktor 1250 E | TANA Shark 4400 |
|---|---|---|
| C&D waste / reinforced concrete | 80 – 120 t/h | 60 – 90 t/h (counter-screen deforms on rebar) |
| RDF / SRF fuel output | 20 – 30 t/h (coarse primary) | 25 – 40 t/h (precise fraction — TANA strength) |
| Waste wood / biomass | 40 – 60 t/h | 40 – 60 t/h |
| OTR / truck tires | 15 – 25 t/h (steel cord liberated, no wrapping) | 8 – 15 t/h (wire wraps shaft, manual torch cleanup) |
| Reinforced concrete (rebar ≥ 25 mm) | On-demand shred (async anti-wrap, independent reverse) | Not recommended (counter-knife fracture, planetary gear shear risk) |
The ARJES Impaktor 1250 E ships with dual 250 kW asynchronous electric motors driven by VFDs. Under load the machine draws an average 320 kW·h per operating hour — over 10,000 hours at 0.15 EUR/kW·h industrial tariff that is 480,000 EUR. The TANA Shark 4400 with a 400 kW Cummins diesel burns ~45 l/h, costing 675,000 EUR at 1.50 EUR/litre over the same horizon. The 195,000 EUR energy delta is compounded by zero DPF/SCR service, zero oil filters, zero injector maintenance, and zero AdBlue consumption on the electric machine.
The TANA Shark 4400 and Komptech Terminator 6000 use a single-shaft rotor with stationary counter-knives. On C&D waste with rebar mesh, wire, and sheet steel, the rotor acts as a spool — wire wraps around the shaft body, extrudes the Hardox side seals, and invades the bearing journals. The ARJES Impaktor 1250 E uses two asynchronous shafts rotating at different speeds and directions: the differential shears the wire, the counter-rotation strips it off the shaft body, and the machine self-cleans without operator intervention.
When a TANA or Komptech single-shaft rotor ingests a rail section, tank track, or I-beam, the tramp metal jams between the rotor and the stationary counter-knife. The entire kinetic load transmits through the planetary gear train into the flywheel and engine — bursting hydraulic motors or shearing planetary teeth. The ARJES Impaktor 1250 E uses independent hydraulic drive per shaft with high-resolution pressure sensors: the SCU detects the pressure spike in milliseconds, halts the blocked shaft, and reverses it while the second shaft continues to push the obstruction out. No mechanical shear, no gear damage.
The Impaktor 1250 E uses Variable Frequency Drives to ramp motor speed on a programmable torque curve, eliminating the inrush current spike that would otherwise sag an aging 20 kV industrial substation. This is decisive for CEE demolition sites fed from Soviet-era substations — a direct-on-line start of a 500 kW motor would trip the substation breaker and shut down the entire site. The TANA Shark 4400 diesel has no grid dependency, but pays for it in 675,000 EUR of fuel over 10,000 hours.
For dedicated RDF / SRF fuel production lines where a tight, adjustable output fraction (e.g. 50–80 mm) is the primary deliverable, the TANA Shark 4400 with its adjustable counter-screen is the better tool. ARJES positions the Impaktor 1250 E as a primary shredder for dirty, mixed, and contaminated streams — not as a precision fractioner. For RDF lines, ARJES pairs the 1250 E with a downstream AXE ARM-TR 4500 drum screen to achieve the same fraction precision without sacrificing primary-shred survivability.
Both are heavy-class shredders, but in fundamentally different drive and shaft architectures. The Impaktor 1250 E is a 500 kW twin-shaft asynchronous electric flagship with VFD soft-start; the TANA Shark 4400 is a 400 kW single-shaft diesel with adjustable counter-screen for RDF fraction control. They are commonly shortlisted together for C&D, RDF, and waste-wood lines where energy cost and rebar tolerance are deciding factors.
At 0.15 EUR/kW·h industrial electricity and 1.50 EUR/litre diesel: the Impaktor 1250 E draws 320 kW·h avg, costing 480,000 EUR over 10,000 h. The TANA Shark 4400 burns 45 l/h, costing 675,000 EUR. The 195,000 EUR energy delta (≈30%) is compounded by zero DPF/SCR, oil, filter, and AdBlue service on the electric machine.
A single-shaft rotor with a stationary counter-knife acts as a spool for wire and rebar mesh — the material wraps around the shaft, extrudes Hardox side seals, and invades bearing journals. On a tramp metal drop (rail, I-beam) the rotor jams against the counter-knife and the full kinetic load shears planetary gear teeth or bursts the hydraulic motor. The ARJES asynchronous twin-shaft geometry shears the wire via differential speed and self-cleans via counter-rotation, with independent per-shaft reverse preventing gear overload.
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