The total volume of the working drum of the cement mixer. The amount of solution that can be prepared in the device at a time directly depends on this parameter. Accordingly, it is worth choosing a model according to the volume of the drum depending on the scale of the proposed work — the more concrete is needed and the more people are involved in the process, the larger the cement mixer should be. At the same time, it does not always make sense to chase the maximum capacity — after all, such models are not only rather bulky and high consumption, but also expensive.
Also note that you should not confuse the total volume with the amount of mixture prepared at a time: since the drum is never completely filled, its working volume, by definition, will be lower than the total (for more details, see "Volume of the finished mixture"). However, when choosing a model, depending on the scale of work, it is customary to focus on the total volume of the drum. So, the best option for a team of 4 – 5 workers is most often called 150 – 180 liters, and for small construction by one person —
about 50 – 70 liters. More detailed recommendations can be found in specialized manuals.