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FEATURE BEARINGS & LINEAR MOTION


SUSTAINABILITY IN THE SKIES


Chris Johnson, managing director at SMB Bearings, examines why industrial bearings will


play an integral role in supporting the aerospace and defence industry’s pursuit of sustainability


rapid technological evolution in the aerospace and defence (A&D) industry’. At the forefront of this evolution are innovative designs and sustainable propulsion technologies. Sustainable aviation fuel could contribute 62% of the carbon mitigation required by 2050, predicts the International Air Transport Association (IATA). Furthermore, the demand for reduced and zero-emission aviation is propelling the growth of electric, hybrid, hydrogen and solar-powered propulsion technologies. Bearings will play a pivotal role in supporting


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new product introductions and sustainability initiatives in the A&D industry, contributing significantly to efficient propulsion systems, advanced manufacturing processes and the digital transformation through predictive maintenance.


ENHANCED ENERGY EFFICIENCY Industrial bearings – integral in machinery used for manufacturing processes ranging from the production of aircraft structural components to intricate parts of propulsion systems – facilitate motion and reduce friction. In the context of environmentally friendly aircraft components, precision becomes even more critical. By incorporating high-performance bearings,


A&D companies can effectively mitigate frictional losses, contributing to enhanced energy efficiency. This reduction in friction translates to more streamlined and efficient engine operations. An example is variable pitch propellers, which support improved aerodynamics and fuel efficiency. Precision-engineered bearings support their optimal functioning, enhancing aircraft performance, reducing environmental impact through decreased fuel consumption and emissions, and promoting sustainability. Companies are also exploring advanced


materials and manufacturing methods to create lightweight, energy-efficient, and sustainable components. Bearings contribute to the precision of these manufacturing processes by ensuring accurate alignment and movement of machinery, which is vital for creating components that meet stringent quality standards. Another crucial area is digital transformation


and predictive maintenance. Smart bearings with embedded sensors enable real-time monitoring of engine performance, facilitating predictive maintenance and preventing failures. This helps reduce downtime, increases reliability, and


40 DESIGN SOLUTIONS SEPTEMBER 2024


ccording to Deloitte, ‘the demand for sustainability, product innovations, and wartime defence is expected to result in


minimises resource consumption, making aircraft propulsion systems more sustainable, efficient and economically viable in the long run.


BEARINGS TO WITHSTAND HARSH CONDITIONS The choice of industrial bearings is crucial for aerospace design, where specifications demand lightweight, low-friction and long- lasting components. While durable and reliable, metal bearings may not be the most suitable for weight-sensitive aerospace components. A plastic bearing, however, is five times lighter than its steel counterpart. Reinforced composite bearings can deliver enhanced technical performance while using less material, making them ideal for various aerospace applications. Some plastic composites used in bearings are


resistant to heat, UV exposure, and harsh conditions. This resistance is crucial, especially when aircraft must navigate through extreme turbulent winds. Modern reinforced composite bearings stay intact, avoiding moisture absorption and outperforming metal counterparts in harsh environments. This significantly increases the lifespan of the aircraft and mitigates the need for costly repairs caused by corrosion. For smaller and space-limited aerospace


projects, such as those found in the reclining elements of seats, EZO thin section bearings


manufactured by Sapporo Precision in Japan are recommended. These bearings are known for their consistent quality.


AEROSPACE BEARINGS Bearings are used across the entire aircraft, including aircraft wing systems, flight controls, cockpit controls and aircraft interiors, to name just a few. Design engineers are working with very ambitious specifications, which rely heavily on ultra-low friction, lightweight, compact, and long-lasting bearings. Even the miniature bearings in the aircraft


interior – from the seats, bins, latches, and hinge points – require careful consideration, as every gram counts. Bearing material and lubrication are two of the most important factors in the selection process, impacting bearing speed, load capabilities, and long- term maintenance requirements. It’s clear that industrial bearings will play an integral role in supporting the A&D industry’s pursuit of sustainability – from enhancing propulsion efficiency to facilitating precision manufacturing. Manufacturers mustn’t overlook their importance in achieving Net Zero CO2 emissions by 2050.


SMB Bearings T: 01993 842555 www.smbbearings.com


HIGH FORCE ELECTRIC LINEAR ACTUATORS FOR A WIDE RANGE OF APPLICATIONS


Tolomatic has expanded and enhanced its RSX High Force Electric Linear Actuator range, including updated model numbering and the introduction of new products, making them suitable for a range of applications – from general industrial use to specific sectors like food processing, where cleanliness and precision are paramount. The expanded RSX range includes five new sizes, capable of producing forces up to 294 kN (66,000 lbf). To


reflect this, the model numbers have been changed to denote the thrust each actuator offers, with the RSX096 now being named RSX15 and the RSX128 renamed RSX25. The actuators are designed to replace traditional hydraulic systems


and are built to withstand harsh environments. Special versions are available for extreme cold or marine applications. This durability is achieved thanks to Tolomatic’s high-precision planetary roller screws. The enhanced RSX actuators are available with Ball and Planetary


roller screw driven designs, and their Type III hard coat anodised aluminium housing protects the actuators in harsh environments. An IP67 option offers resistance against dust and water ingress. Food grade options are also available.


INMOCO T: 01327 307600 www.inmoco.co.uk


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