The Transformation of the Sugar Industry
The sugar industry is shifting from “growth in scale” — driven by land area and raw output — toward “growth in depth,” driven by technology, energy efficiency, and sustainable development. In this transformation, drive systems play a critical role, directly influencing the efficiency, reliability, and overall productivity of sugarcane production processes.
For existing sugar mills, the need to upgrade or replace drive systems often arises from practical operational challenges:
- Declining drive efficiency: Aging gearboxes, couplings, and drive equipment may experience vibration, overheating, and wear, increasing energy losses and affecting operational efficiency.
- Increasing difficulty in sourcing equipment and spare parts: Some older equipment may have been discontinued or have limited availability of compatible spare parts, resulting in longer repair and recovery times.
- Higher risk of unplanned downtime: Unexpected failures in drive systems can disrupt the entire production line, which is particularly critical during peak crushing season.
For new sugar mill projects, drive solutions need to be selected from the design stage to meet capacity requirements, optimize efficiency, and ensure long-term operation. Key requirements include:
- Ensuring continuous operation: Drive systems need to provide high reliability to minimize failures and unplanned downtime.
- Optimizing overall system efficiency: Properly selected and integrated equipment enables the mill to maximize production capacity while controlling energy consumption.
- Ready for monitoring and maintenance: Drive systems should support early detection of abnormalities and enable proactive maintenance planning.
In particular, given the seasonal nature of sugar production, any unplanned downtime can directly affect the Commercial Cane Sugar (CCS) content of sugarcane, production output, schedule, and the mill’s economic efficiency.
Flender’s mechanical drive solutions address the needs of both existing sugar mills and new mill projects. With a long-standing history dating back to 1899, Flender focuses on three core pillars: Productivity, Efficiency, and Reliability. From high-power gear units to a wide range of coupling solutions, Flender’s drive technologies help enhance reliability, minimize downtime, and optimize operational efficiency throughout the crushing season.
Specific Applications in Sugar Production
1. Cane preparation
Continuous and reliable handling of incoming raw materials is essential to ensure smooth production and extraction processes. Powerful and durable drive equipment is key to maintaining and enhancing sugar mill productivity.
Solution:
Flender One Next-Generation Gear Unit: Flexible, Efficient, and Smart
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Picture 1: Flender One Gear Unit
Features:
- Torque range from 1,900 Nm to 245,000 Nm.
- Featuring the proprietary METAPERFORM® core gear technology, designed to optimize efficiency and reduce energy consumption, with an average 20% improvement in heat dissipation performance compared to the previous generation.
- A wide range of gear ratios, with up to 130 gear ratios per size, meeting the requirements of most applications with demanding speed requirements.
- Integrated smart diagnostic devices enable continuous condition monitoring and remote equipment management.
Applications:
- Cane levelers
- Cane shredders
- Hammer-type cane fibrizers
- Cane conveyors
2. Extraction house
Continuous plant operation is a key factor determining the economic efficiency of a sugar mill. Throughout the crushing season, unplanned downtime is unacceptable.
Solution:
The PLANUREX 3 series gear units, featuring a compact design and high-quality standards, are ideal for applications where space is limited but extremely high power is required.

Picture 2: PLANUREX 3 series
Features:
- Torque range of up to 5,450,000 Nm.
- Gear ratios of up to 1:300.
- Suitable for both horizontal and vertical installation configurations.
- High overload capacity: capable of handling torque loads of up to 2 times the rated torque.
- Modular design for flexible configuration.
Applications:
- Independently driven sugarcane mills
- Centrally driven sugarcane mills
- Diffusers
3.Process house
The refining and crystallization processes are critical stages that have a significant impact on the quality of raw sugar. Maximum output capacity can only be achieved by using optimized drive technology.
Solution:
FLENDER SIP® planetary gear units, featuring high material fatigue resistance, high reliability, and a high gear ratio density.
Features:
- Torque range: from 10,000 Nm to 80,000 Nm.
- Gear ratios ranging from 1:25 to 1:15,000.
- Suitable for both horizontal and vertical installation configurations.
- Combined with geared motors, offering a wide range of options and flexible installation configurations for the system.

Picture 3: FLENDER SIP
Applications:
- Vacuum filters
- Clarifier agitators
- Vertical crystallizers
- Sugar centrifuges
4. Sugar warehouse
A smooth production process depends on a reliable logistics system. In the finished goods warehouse, the stable operation of conveyor systems and bucket elevators is key to maintaining an uninterrupted supply chain.
Solution:
- Flender provides fully assembled, ready-to-operate conveyor drive systems. The self-aligning conveyor system helps reduce alignment and installation work.
- Features:
- Torque range of up to 1,400,000 Nm.
- Gear ratios of up to 1:450.
- Modular system with a comprehensive range of accessories, including oil pumps, various output shaft configurations, holding devices, brakes, fans, and more.
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Picture 4: Conveyor Drive System
Applications:
- Screw conveyors
- Bucket elevators
- Conveyor systems
5. Couplings
- Couplings play a vital role in protecting the entire drive system and production process.
- A wide range of couplings, specifically designed for different applications.
- To ensure maximum safety and reliability, coupling characteristics are continuously and rigorously tested using dedicated test systems.
- Flender offers a wide range of coupling designs, sizes, and assemblies with a high degree of standardization, supporting torque ranges of up to 10,000,000 Nm.
- Key Product Lines:
- N-BIPEX®, FLUDEX®, N-EUPEX®, ELPEX®, ZAPEX-ZW®, RUPEX®, N-ARPEX®.

Picture 5: Flender Coupling Series
ESTEC not only provides high-quality and reliable products and solutions but also places strong emphasis on after-sales service and customer support.
Our team of highly experienced and qualified engineers is always ready to support customers throughout the product warranty period in accordance with the manufacturer’s policies, helping ensure stable and reliable plant operations.
As an Authorized Distributor of Flender and the only Authorized Service Partner of Flender in Vietnam, ESTEC is proud to provide high-quality gear unit and coupling solutions that meet the technical requirements of businesses.

Picture 6: ESTEC Implementing a Project for a Customer

Picture 7: Work at ESTEC’s Gearbox Repair Workshop
6. Frequently Asked Questions About Flender Drive Solutions for the Sugar Industry
1. Which equipment in a sugar mill are Flender gear units suitable for?
Flender gear units can be used in most stages of sugarcane processing, including cane shredders, fibrizers, conveyors, sugarcane mills, diffusers, agitators, centrifuges, and many other drive applications.
2. What applications is PLANUREX 3 suitable for in sugar mills?
PLANUREX 3 is suitable for high-torque main applications, such as independently driven sugarcane mills, centrally driven sugarcane mills, and diffusers.
3. At which stage is FLENDER SIP used?
FLENDER SIP is a compact, highly configurable gear unit series suitable for applications with limited installation space or specific configuration requirements, such as vacuum filters, clarifier agitators, vertical crystallizers, and sugar centrifuges.
4. How do you select the right gear unit for a sugar mill?
For each specific application, we offer dedicated gear units with a wide range of options and accessories to meet demanding operating requirements. Businesses simply need to provide the technical specifications and specific equipment requirements, and our engineering team will provide consultation to help select the appropriate solution.
5. What role do Flender couplings play in a drive system?
Couplings transmit torque between shafts, help dampen vibrations and shocks, and protect drive equipment by isolating it from certain loads and disturbances when unexpected events occur.
6. Does ESTEC provide maintenance and technical support for Flender equipment?
Yes. ESTEC provides technical support and after-sales services within its authorized service scope, helping customers maintain the reliability and availability of their drive systems.
7. Can ESTEC provide drive solution consulting for existing sugar mills?
Yes. ESTEC can work with customers to survey and assess applications, operating parameters, and technical requirements in order to propose suitable drive solutions for new systems, replacements, or upgrades.
Contact ESTEC for detailed consultation.
Tel: (+84) 28 6684 1999
Hotline: (+84) 28 8886 8799
Email: info@biendongco.vn







