A rock drilling machine is not designed for speed. Its purpose is to be powerful and stable.
However, it needs to move around a large worksite (like a quarry or mine) under its own power.
10 km/h (about 6 mph) is a very realistic and common top speed for these large, tracked or wheeled vehicles when moving from one drilling location to another. They are not built for road travel and are transported on low-loaders for long distances.
