Flender’s “Backlash-free applications – easy solutions” refers to a specialized series of backlash-free couplings, designed as a modular interface between motors and industrial machinery to deliver reliable, play-free power transmission[9]. This product line focuses on solving positioning and servo drive challenges, integrating user-friendly design with high precision, making it widely applicable in diverse industrial scenarios worldwide. Manufactured in Germany with strict quality control, these couplings balance performance, flexibility and ease of use, becoming a trusted choice for industries requiring accurate torque transmission[3][6].

The series mainly includes two core models: BIPEX-S and SIPEX, each tailored to different application needs[2][5]. BIPEX-S is a vibration-damping, electrically insulating claw coupling, composed of aluminum or steel hubs and a polyurethane cam ring[6]. It offers 10 sizes, with a nominal torque range of 0.5 Nm to 655 Nm and an operating temperature range of -50 °C to +120 °C, supporting a maximum rotational speed of 47,500 rpm[6][9]. SIPEX is a torsion-resistant metal bellow coupling, featuring aluminum hubs and stainless steel bellows, available in 20 sizes with a nominal torque range of 0.1 Nm to 5,000 Nm and operating temperature of -30 °C to +120 °C, suitable for high-precision angle-preserving transmission[3][9].

A key advantage of this series is its easy installation and maintenance-free operation[3][6]. Most variants adopt a plug-in design that requires no special tools, and their wear-free components eliminate the need for regular part replacement. Both models have compact structures with low moment of inertia, making them suitable for highly dynamic applications[3][6]. They can effectively compensate for axial, radial and angular shaft misalignments with low restoring forces, ensuring stable operation[1][7].

These couplings comply with strict industrial standards, with some variants certified to ATEX directive (2014/34/EU) for use in explosive environments and meeting the requirements of API 610 and API 671 standards[1][7]. Their modular design offers diverse hub options, simplifying inventory management and improving compatibility with different equipment layouts[3][7].

Common applications include machine tools (feed axes, spindles), packaging and textile machinery, as well as chemical, pharmaceutical and food and beverage industries[3][6]. Overall, Flender’s “Backlash-free applications – easy solutions” series is a user-centric, high-performance product line that integrates precision, simplicity and reliability, providing hassle-free, play-free power transmission solutions for modern industrial servo and positioning drives[3][6].