Editor's Choice


Gear business driven by sustainability

Technews Industry Guide: Sustainable Manufacturing 2023 Editor's Choice Motion Control & Drives

SEW-EURODRIVE has for many years pursued a sustainability agenda that is applied across every aspect of its business. According to SEW-EURODRIVE managing partner Jürgen Blickle points out that sustainability is nothing new for SEW-EURODRIVE, which has long since seen recycling as an essential step in achieving a sustainable circular economy. The company has also championed renewable and efficient energy sources, and maximised the energy efficiency of its drives.

Living up to responsibilities

Through a long-term sustainability initiative called sustainability@SEW, the company is gradually and consistently safeguarding resources, lowering CO2 emissions and optimising its entire value chain. This cradle to cradle approach – established back in 1990 as an end-to-end system for a circular economy – is now a benchmark for the environmentally-friendly development of products and associated processes. It means that all the products, materials and substances used to manufacture a product can be fully returned to, or reused in, biological or technical loops.

Eco-design

This holistic approach is the basis for planning the roll-out of SEW-EURODRIVE’s in-house eco-design guidelines. An example of how this is applied can be found in the way the company is developing and documenting two projects already underway on the recycling of brake components and magnets.

Another project will take these findings further and incorporate more product families. With its depth of expertise built from its sustained commitment to quality, SEW-EURODRIVE is opening a completely new chapter in product design with this sustainable product concept development. Its design guidelines will be distilled it into practical recommendations, such as avoiding the use of certain adhesives or casting resin.

Reuse and recycling

The company will also produce an extended product qualification system as a benchmark for product development. Among the focus areas are reuse and recycling, which give many components a second lease on life. The scope of recycling is to be maximised, while leveraging a reuse system that puts as many products as possible back into service.

This means inspecting and cleaning reusable parts to possibly be fed back directly into the production process. This saves on the energy required to recycle copper, steel, and die-cast aluminium parts – including the transport, separation and melting down of used parts.

Gear lubricant from sustainable biomass

In another sustainability innovation, SEW-EURODRIVE has developed a CO2-reduced lubricant for its gear units. With 90 years of experience in developing and building gear units, the company has considerable expertise in tribology – the study of friction, lubrication and wear. Last year, it launched GearFluid Poly 220 E1, the first CO2-reduced gear unit lubricant made from sustainable biomass, rather than from petroleum or another fossil raw material.

This improves the carbon footprint of GearFluid by 84% compared to petroleum-based polyglycol base oils. The biomass does not even need to be specially produced, and it takes up no additional agricultural land. Instead, the biomass comes from green cuttings and food waste, which is readily available, and can now be very easily recycled.

This biowaste undergoes a complex synthesis process that transforms it into a high-quality base oil. The packaging has also been designed with sustainability in mind, so there is 25% recycled plastic in the cannisters for the oil.

Sustainable service

SEW-EURODRIVE’s holistic sustainability focus extends to the service end of its business, demanding that its products should always be designed to be as maintenance- and repair-friendly as possible. An example of this is how gear units and gearmotors can be disassembled non-destructively and then reassembled again once faulty or worn parts have been replaced. Extending the service life of existing products also means having all individual components available worldwide for decades, to avoid unnecessarily using up resources on new equipment.

The company’s Life Cycle Services are the next logical step in this approach. These services are based on the concept of a holistic, closed loop that covers a product’s entire service lifespan while in use with the customer.

Provided by a dedicated contact, customers receive the best possible expertise and advice for their drive technology. An illustration of how this supports sustainability is the maintenance-friendly connection between SEW-EURODRIVE’s gear units and motors. This connection is made with a pinion shaft that has a key, and a mounted pinion with a corresponding slot. Unlike on crimped pinions, this connection can be disassembled without destroying the parts. Any necessary repairs can be carried out at the customer’s premises or in one of SEW-EURODRIVE’s service centres.

“Maintaining and protecting the very basis of our existence – that is exactly what sustainability means and that is what drives us at SEW-EURODRIVE,” concludes Blickle.

For further information contact SEW-EURODRIVE, +27 11 248 7000, bfutter@sew.co.za, www.sew-eurodrive.co.za


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