Work

Stannah 158 Stairlift

A new kind of stairlift

JMDA was engaged by Stannah as a mechanical design resource partner for the 158 stairlift development, launched in 2025. Our remit centred on the seat unit, where we were tasked with engineering the backrest, armrests, seatbelt system and sitting area from a specific external design intent. This required a detailed understanding of both user interaction and the constraints imposed by the stairlift’s complex mechanical architecture, ensuring that comfort, safety and usability were fully aligned with the overarching product intent.

158 offers a reimagined user experience, with a new forward-facing seat fold to create a neater folded profile, a deep seat with inclined backrest for enhanced user comfort and gentle audio responses to provide reassurance in use.

Client

Making A Concept A Reality

A key focus of the project was the development of production-ready, Design for Manufacture (DFM) solutions that maintained the integrity of the original design intent while integrating seamlessly with the stairlift’s mechanical functionality. JMDA evaluated multiple construction methods, mechanisms and material strategies to balance performance, manufacturability, robustness and cost. As an external design partner, JMDA helped Stannah explore the unknowns and new ideas, unrestricted from the preconceptions that come in a corporate environment.

Working in close collaboration with Stannah’s internal engineering team, we helped rationalise and refine the seat unit architecture, resolving technical challenges and supporting the transition from concept to viable production solution—ultimately enabling a high-quality, design-led product to be successfully realised for manufacture.

“JMDA‘s experience in restraint design and technology contributed to this flagship new chair enabling Stannah to maintain and reinforce it as the leading brand in the stairlift market.”

Engineering Manager, Stannah

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