CTS - 3 | Twin Shaft Concrete Mixer

CTS-3 Twin Shaft Mixer is the high-output model that moves the CONSTMACH CTS range from mid-capacity into serious production volume. It accepts a charging volume of 4,500 lt, produces 3,750 lt of fresh concrete and discharges 3,000 lt of compacted concrete in each batch. With three cubic metres per cycle it is built for stationary ready-mix plants running at high hourly rates and for precast factories that need to keep multiple casting lines fed without waiting on the mixer.

Power is delivered by two 55 kW motors, a step up from the twin 37 kW drives of the CTS-2, giving each shaft the torque to mix a full 4,500 lt charge of dense or low-slump concrete and to start under load batch after batch through a continuous shift. The two horizontal shafts counter-rotate, throwing material from each side toward the centre where the streams collide; jetted water is absorbed rapidly and the cement slurry coats every aggregate particle uniformly, producing a homogeneous 3 m³ batch in the short cycle that twin-shaft mixing is known for. At this size the speed and completeness of mixing directly govern the plant's achievable throughput.

Wear protection is reinforced for the higher volume and the larger mass of aggregate passing through the trough. The side body steps up to 20 mm Hardox liners, the main body uses 20 mm wearing plates, and the mixing arms carry 30 mm wearing plates at the heaviest abrasion points. Thicker side liners than the CTS-2 extend the service interval under the increased material flow, and all liners remain individually replaceable so the abrasion zones can be renewed without retiring the trough body.

The automatic lubrication system meters grease to the four shaft bearings and seals on a set schedule, which is essential on a high-duty machine that may run continuously through long shifts; reliable bearing lubrication is the main defence against unplanned downtime at this throughput. A hydraulic discharge door empties the 3 m³ batch quickly and cleanly, and rapid discharge matters here because any delay in emptying the trough lengthens the cycle and caps the plant's hourly output.

A maintenance door safety switch interlocks the inspection door with both drives, stopping both shafts whenever the door is opened so cleaning and liner inspection can be carried out safely. On a high-output unit that is cleaned and inspected frequently, a dependable interlock is an operational as well as a safety requirement.

In service, the CTS-3 suits high-capacity central ready-mix plants supplying large urban and infrastructure projects, busy precast factories producing beams, panels and pipes, and paver plants running at volume. Its 3 m³ batch and twin 55 kW drives place it above the CTS-1 and CTS-2 and below the central-mix CTS-4 and CTS-5, making it the practical choice for plants that need genuine high throughput without moving to the largest frames. Integrated with CONSTMACH aggregate, cement and water dosing systems, the CTS-3 anchors a high-output concrete production line.