Diesel waterjet machines are vehicles that use high-pressure water. These machines operate using diesel fuel in their engines. Due to this feature, diesel waterjet machines are ideal for long-term cutting operations and are often used in outdoor work.

Diesel waterjet machines are ideal for outdoor work and provide mobility. The use of high-pressure water for cutting operations produces less chips and dust, creating a cleaner work environment. However, compared to other waterjet machines, they are more disadvantageous due to their noise levels and harmful emissions to the environment.