SURPRICE. SMALL COUPLING. SMALL PRICE.

• Double-jointed gear coupling N-ZAPEX XW – The new standard for efficiency, compactness, and cost-effectiveness in very large and demanding industrial applications
• Rated torque range: TKN = 9,800 Nm to 10,000,000 Nm across 24 sizes
• Temperature range: –30 °C to +80 °C

The N-ZAPEX XW GEAR COUPLING, developed by Flender, is a high-performance double-jointed gear coupling engineered for large sizes and demanding industrial applications[1

Constructed with high-grade steel components, the coupling features a compact, lightweight design that simplifies installation, servicing, and spare parts management[

A core advantage is its exceptional misalignment compensation capacity—30% higher than Flender’s previous gear coupling series—effectively accommodating axial, radial, and angular shaft misalignments[1][4

The N-ZAPEX XW GEAR COUPLING delivers the highest torque density on the market, combined with reusable components and standardized modular parts that simplify inventory management[1][4]. It is built for durability, capable of withstanding the harsh conditions of heavy-duty industries, including extreme loads and continuous operation[2][4]. Its design also ensures optimal serviceability, with features that reduce lifecycle costs from commissioning to the end of its service life[1][4].

Common applications include steel, cement, mining, and oil and gas industries, as well as heavy-duty equipment like large mills, crushers, and industrial drives operating under harsh conditions[1

N-ZAPEX XW – A new benchmark for advanced customer requirements

The N-ZAPEX XW sets new standards for gear couplings up to the high-performance range and for engineered solutions. Its innovative, patented Hollow-O-Ring sealing concept ensures maximum serviceability and cost advantages. With maximum modularity, the widest range of variants on the market, and maximum torques of up to 10 million Nm, the XW is the perfect solution for joint-critical applications across major industrial sectors.

Your benefits at a glance with N-ZAPEX XW

We have achieved cost advantages with the N-ZAPEX XW through the following technological innovations.

• Largest bore sizes, compact design: Thanks to maximum bore capacities and very high torques, the N-ZAPEX XW often allows for the selection of a smaller coupling size for the same application. This saves costs and installation space while also reducing the load on machines and bearings.
• Maximum power density: Top performance figures in the smallest installation space—making the N-ZAPEX XW the most compact gear coupling on the market and ensuring a more efficient machine layout.
• Innovative Hollow O-Ring Sealing Concept: This novel and service-friendly sealing concept ensures fast and cost-effective maintenance, minimizes downtime, and delivers cost advantages. The seal can optionally be replaced without cutting and subsequent sealing by gluing, thereby significantly reducing the effort involved.
• Maximum overload capacity: The XW offers up to 30% more overload capacity than the previous series, ensuring maximum system availability and process reliability, even under the most demanding operating conditions.
• Service advantage: The optimized and compact design of the N-ZAPEX XW significantly simplifies service and handling. Its patented sealing concept enables quick and cost-effective replacement and minimizes downtime. The reduced complexity of parts ensures easy spare parts inventory management and enables leaner processes during service.
• Maximum modularity and variety of variants: The highest level of modularity and widest range of modular options on the market offer tailor-made solutions for every industrial application and requirement. Engineered solutions are just as possible as standard catalog solutions.
• Outstanding performance range: With torques of up to 10 million Nm, the XW combines maximum power transmission with low weight, a compact footprint, and optimal machine design.
• Highest Flender quality: Flender stands for the highest manufacturing and product quality and is among the most sustainable and investment-secure companies worldwide.

Applications

The N-ZAPEX XW is used in rolling mills, roll drives, reel drives, mills, rotary kilns, pumps, mixers, and all demanding applications in the steel and cement industries, mining, energy, and many other industries where—often under harsh conditions—maximum performance, flexibility, and fast service processes are required.

Did you know?

With the N-ZAPEX XW, you save twice: both on the initial investment and on service. You’re relying on a platform that not only sets technical standards compared to the market—but also offers uncompromising cost and service efficiency. The reduction in size and weight minimizes machine wear, simplifies installation, service, and spare parts management, and ensures that you protect your investment optimally.

N-ZAPEX XW – Compactness, cost-effectiveness, and technical excellence: The new generation of gear couplings for the highest industrial standards