TBM Front Shield Guidance Cylinders

It’s 2:00 AM, and you are deep under the city. The laser target on the guidance screen shows the TBM is drifting 15mm to the right. You try to correct it by extending the left bank of articulation cylinders, but nothing happens—or worse, the pressure holds for a...

TBM Cutterhead Locking Cylinders

There is a specific kind of silence that happens inside the cutterhead chamber of a Tunnel Boring Machine (TBM) when the main drive is shut down. It’s heavy. You are standing in front of a 400-ton steel face that wants nothing more than to rotate due to gravity and...

TBM Synchronous Grouting Cylinders

You are three kilometers deep into a tunnel drive, the humidity is near 100%, and the air smells like wet cement and hydraulic fluid. The TBM is pushing forward, and the most critical operation happening at the tail skin isn’t just the cutting—it’s the...