AUTECH Rail Grinder - AT VM 8000
The AUTECH AT VM 8000 is a versatile, compact road-rail vehicle (RRV) designed specifically for grinding and re-profiling rails in urban, metro, and suburban environments. It is a flagship model from the Swiss company Autech AG.
Key Specifications & Capabilities
- Grinding Configuration: Typically available in two versions:
- VM 8000-8: 8 grinding stones (2 pairs per side).
- VM 8000-12E: 12 grinding stones (3 pairs per side).
- Versatility: The machine is “two-way,” meaning it can travel at up to 45 km/h on roads to reach a site and then transition to rail wheels in approximately 1.5 to 5 minutes.
- Tight Radius Performance: It is uniquely capable of handling extremely tight curves, with a minimum grinding radius of 20 meters, making it ideal for tram and light-rail networks.
- Power Unit: Built on a Viktor Meili public utility vehicle chassis, powered by a Mercedes-Benz OM 926LA 6-cylinder engine (approx. 322 HP).
- Precision Control: Equipped with the RML 9000 grinding process controller and automated stone positioning, allowing for precise re-profiling of both Vignole (flat-bottom) and grooved rails.
Operational Advantages
Feature | Benefit |
Four-Wheel Steering | High maneuverability in narrow city streets and easy alignment at road crossings. |
Dust & Fire Safety | Integrated dust extraction, spark protection, and optional water curtains for tunnel or dry-area work. |
Hydraulic Drive | Stepless control of grinding stone angles (typically 72° inside to 55° outside). |
High Efficiency | Capable of removing up to 0.2 mm of metal in a single pass at a speed of roughly 250 track meters per hour. |
Common Applications
The AT VM 8000 is primarily used for:
- Corrugation removal to reduce noise and vibration.
- Head Check (RCF) removal and preventive maintenance.
- Switch and turnout grinding (specifically the VM 8000-12 model).
- New rail de-scaling and joint finishing.