Twin-Shaft Mixers

Bozdağ Engineering Twin-Shaft Mixers are powerful mixing systems designed to deliver high performance and superior homogeneity in concrete production.

In the weighing units, the measured aggregates, cement, water, and additives are transferred into the mixer, where the synchronized twin-shaft mixing system ensures complete homogeneity in a short time.
This system provides reliability, speed, and consistency during the most critical stage of concrete production.
In Twin-Shaft Mixers, regardless of the water-cement ratio — whether low or high — the cement fully interacts with the aggregates, ensuring a perfect mix.
This allows for the production of concrete in various consistencies, from zero slump to high slump.

hanks to the angled design of the mixing paddles, the materials move both horizontally and vertically, creating a three-dimensional mixing motion that ensures maximum homogeneity in a short time.

BTS Series Twin-Shaft Mixer Models

Bozdağ Engineering manufactures five different twin-shaft mixer models to meet various production capacity requirements:

Model	Mixing Volume (Liters)	Compacted Concrete Capacity (Liters)	Application Area
BTS 3000-2000	3000	2000	Medium-scale ready-mix concrete plants
BTS 4500-3000	4500	3000	High-capacity concrete batching plants
BTS 6000-4000	6000	4000	Large-scale infrastructure projects
BTS 6750-4500	6750	4500	Precast and tunnel segment production
BTS 9000-6000	9000	6000	Heavy-duty industrial concrete facilities

All models are designed and manufactured with the same principles of high mixing quality, durability, and maintenance efficiency.

BTS 3000 - 2000 Twin Shaft (2 m³) Technical Specifications

Dry Capacity	3000 lt
Compressed Concrete	2000 lt
Mixing Motor Power	2 x 37 kW
Hydraulic Motor Unit	1.5 kW
Gearbox	TRANSMITAL BONFIGLIOLI
Maximum Aggregate Size	90 mm
Yan Yüzey / Wearing Plates – Side Surface	12 mm
Wearing Plates – Bottom Surface	10 mm

BTS 4500 - 3000 Twin Shaft (3 m³) Technical Specifications

Dry Capacity	4.500 lt
Compressed Concrete	3.000 lt
Mixing Motor Power	2 x 55 kW
Hydraulic Motor Unit	1.5 kW
Gearbox	BONFIGLIOLI
Maximum Aggregate Size	90 mm
Wearing Plates – Side Surface	15 mm
Wearing Plates – Bottom Surface	12 mm

BTS 6000 - 4000 Twin Shaft (4 m³) Technical Specifications

Dry Capacity	6.000 lt
Compressed Concrete	4.000 lt
Mixing Motor Power	2 x 75 kW
Hydraulic Motor Unit	1.5 kW
Gearbox	BONFIGLIOLI
Maximum Aggregate Size	90 mm
Wearing Plates – Side Surface	15 mm
Wearing Plates – Bottom Surface	12 mm

BTS 6750-4500 Twin Shaft (4.5 m³) Technical Specifications

Dry Capacity	6.750 lt
Compressed Concrete	4.500 lt
Mixing Motor Power	2 x 90 kW
Hydraulic Motor Unit	1.5 kW
Gearbox	BONFIGLIOLI
Maximum Aggregate Size	90 mm
Wearing Plates – Side Surface	15 mm
Wearing Plates – Bottom Surface	12 mm

BTS 9000 - 6000 Twin Shaft (6 m³) Technical Specifications

Dry Capacity	9.000 lt
Compressed Concrete	6.000 lt
Mixing Motor Power	4 x 55 kW
Hydraulic Motor Unit	2 x 1.5 kW
Gearbox	BONFIGLIOLI
Maximum Aggregate Size	90 mm
Wearing Plates – Side Surface	15 mm
Wearing Plates – Bottom Surface	12 mm

Sealing Components

The sealing components are connected to the mixer body with an additional flange system, ensuring both easy maintenance and an extended service life for the mixer.
All sealing elements are continuously lubricated by an automatic lubrication system, minimizing friction and wear.
This system is one of the key features that enhances the overall efficiency and reliability of the mixer.

Mixing Components

The inner surfaces of the mixer are lined with Hardox 450–500 wear-resistant plates.
The mixing arms are made of special alloy cast steel, while the blades and scrapers are produced from Ni-hard material for maximum durability.
Thanks to the bolted connection system, the blades, scrapers, and arms can be easily replaced when needed.
The special angle and synchronized motion of the blades ensure a complete three-dimensional mix, achieving maximum homogeneity in a short time.

Observation Platform

The observation platform with ladder is designed to allow safe visual inspection and maintenance of the mixer’s interior.
Thanks to its modular structure, it can be easily mounted onto the mixer without the need for cranes or lifting equipment.

Reducers

The mixer reducers feature a planetary gear design. Driven by the electric motor through a belt–pulley system, the reducers rotate in opposite directions at the same speed via a universal joint connection.
Thanks to their high thermal capacity, they operate efficiently without the need for an additional cooling unit.
The connection to the main shafts is made through a flexible gear coupling, which completely eliminates axis misalignment and mechanical imbalance.

Hydraulic Unit

The hydraulic drive system is used to operate the discharge gate.
In case of a power outage or emergency, the gate can be opened and closed manually using a hand pump.
This feature provides a significant advantage in terms of production safety and operational continuity.

Automatic Lubrication System

The sealing components are continuously lubricated by an automatic lubrication unit, ensuring consistent performance and extended component life.
Oil level sensors monitor the system and issue a warning when the level drops below the minimum threshold.
Additionally, all lubrication points are equipped with manual grease fittings, allowing for both automatic and manual maintenance when needed.

Mixer Top Cover

The top cover is designed to allow inspection and cleaning of the mixer interior.
When the cover is opened, an automatic safety switch immediately stops the mixer’s operation.
In addition, an emergency stop switch is installed for the operator to use in critical situations, ensuring maximum safety during maintenance and operation.

Discharge Gate

The discharge gate, located at the bottom of the mixer for releasing the completed mixture, is equipped with Hardox wear plates and heavy-duty bearing housings.
Its robust and reliable construction ensures long service life and durability.
Depending on production requirements, the system can be configured with single or double discharge gates.