The single disc machine is technically more simple. It was created before the scrubbing machine, with the aim of mechanising cleaning operations - especially the washing and treatment of very different types of flooring (marble, terraces, wood, terracotta, klinker, linoleum, etc.). The cleaning operation therefore requires two alternate phases (washing - drying), mechanising a task that would otherwise be performed manually by two operators, taking more time. The scrubbing machine is the evolution of the single disc machine, equipped with a system for collecting the water/detergent solution and dirt removed from the floor. So the single disc machine is still the best for deep-down cleaning operations and special treatment, but the scrubbing machine is more suitable for maintenance cleaning, where adherent dirt needs to be removed without intervening on the surface and the floor must be ready for use again as quickly as possible.

There are models that can work at two different speeds (usually 150-300 rpm), so they can be used for both washing and polishing. Please remember that these are compromise solutions however; they can't be compared with the use of two specific machines (a classic 150-160 and a high speed machine of 400 rpm), and they are only suitable for surfaces of limited size.

With low speeds there are no real differences for the operator but, as the speed increases, the belt offers a lower noise level and smoother functioning. The single disc machine CM1500 with 1500 rpm avoids this problem however, as it has direct drive.

No, there are also high speed battery-operated models (24 or 36V) for polishing large surfaces. These are special models for specific cases of course, where the machine is purposely designed for the polishing or dry maintenance of surfaces that are suitable in terms of material and treatment.

They're professional machines. This means that, to use them, some training is needed with regards both manoeuvring and - especially - treatments (using the specific products and pads). Machine manoeuvring varies for high and low speeds. Low speeds require an alternated right-left movement and, for specific needs, you can work in a limited area; high speeds need continuous, straight line movements.