Zephir specializes in railcar movers built for depots, workshops, factories and industrial railways. The product range covers electric and diesel road-rail movement across very different duties.
In practice: use a compact dedicated shunter to move trains around the depot instead of using a mainline locomotive.
Italy · Railcar shunters
Road-rail and rail shunting solutions with electric and diesel architectures for depot and industrial movement.
CRAB EZ, LOK E and LOK D cover different combinations of zero-emission operation, heavy-duty movement and site flexibility.
Compact electric road-rail shunter for depot and urban fleet movement.
Best for: metros, EMUs and lower-emission depot operations
Electric LOK family for heavier zero-emission shunting.
Best for: heavy depots and facilities prioritizing electric operation
Diesel LOK family for robust heavy shunting.
Best for: yards, production plants and demanding outdoor duty
Dedicated rail configurations where road mobility is not required.
Best for: fixed railway facilities
Configure the operator interface around the local depot workflow.
Best for: safe repetitive positioning
Maintain batteries, engines, rail wheels, brakes, couplers and controls.
Best for: long-lived installed shunter fleets
Mass, gradient, curves, frequency and distance.
Coupler, train brake, gauge and access route.
Electric, diesel, road-rail or rail-only.
Fuel/charging, operators, spares and service.
Dedicated shunters are designed around frequent short moves and precise depot positioning.
Before: routine moves consume locomotives or improvised towing resources.
After: vehicle positioning becomes a dedicated depot capability.
CBP sizes the real shunting duty, coordinates Zephir engineering and can structure commissioning, operator training, spares and long-term availability support.
Start with just two numbers for an immediate gradient-load insight. Add a few optional details to explore the technology route, or use the advanced calculator for train resistance along a route.
Only train mass and maximum gradient are needed for the first result. Enter 0‰ for a level route. This is not total towing resistance.
Gradient uses per mille (‰), not percent: 10‰ = 1%. The displayed gradient load excludes other movement resistance.
Gradient resistance is calculated directly. Rolling, starting and curve resistance are not guessed; they remain open until engineering inputs are sufficient.
For a deeper screen: gauge, power and road–rail mobility. Other fields can wait.
Enter your own starting and running coefficients in kgf/t. The calculation uses uniformly distributed train mass over its stated length and route-section data. It is train-only; shunter weight, acceleration, adhesion, power and braking are excluded. No OEM capacity is inferred.
Gradient is entered in ‰ (10‰ = 1%). Use a signed negative value for downhill. Blank curve radius means straight track. If a curve exists, enter its customer/OEM-supported curve resistance coefficient in kgf/t for that section; none is assumed.
For this screening method, the supplied sections must cover at least the entire train length. Results apply only when the full train occupies the defined route; entry/exit transitions and shunter resistance are not evaluated.