3D Printing Revolutionizes the Rail Industry: Case Studies & Benefits

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Over the past year, major rail operators such as Deutsche Bahn, Bombardier and Angel Trains have significantly expanded their 3D‑printing capabilities.

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According to a recent EY study, 16 % of logistics and transportation firms now use additive manufacturing to produce spare parts.

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What is driving this rapid adoption?

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In this Application Spotlight, we examine the forces propelling the railway sector toward additive manufacturing and showcase the most compelling use cases.

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Explore other applications in our series:

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• 3D Printing for Heat Exchangers
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• 3D Printing for Bearings
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• 3D Printing for Bike Manufacturing
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• 3D Printing for Digital Dentistry & Clear Aligner Manufacturing
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• 3D Printing for Medical Implants
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• 3D‑Printed Rockets and the Future of Spacecraft Manufacturing
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• 3D Printing for Footwear Manufacturing
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• 3D Printing for Electronic Components
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• 3D‑Printed Eyewear
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• 3D Printing for End‑Part Production
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• 3D Printing for Brackets
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• 3D Printing for Turbine Parts
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• How 3D Printing Enables Better‑Performing Hydraulic Components
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• How 3D Printing Supports Innovation in the Nuclear Power Industry
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Why are railway companies embracing industrial 3D printing?

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Constructing a train demands components that endure decades of operation. When a part fails—especially one that was produced 20–30 years ago—finding a replacement can be daunting.

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Many rail operators confront discontinued production lines or defunct suppliers. Producing the part anew with conventional high‑volume methods is often uneconomical, particularly when the required quantity is small.

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Moreover, each day a train sits idle incurs substantial costs. Rail companies therefore seek rapid, cost‑effective solutions for obsolete parts.

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3D printing— a digital manufacturing technology that eliminates the need for moulds—fits this need perfectly. Tool‑less production can cut lead times by up to 95 % and, when combined with reverse engineering, allows quick recreation of lost designs.

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Early adopters like Deutsche Bahn have identified a growing list of parts suitable for additive manufacturing, ranging from coffee machine components to Braille signposts for visually impaired passengers. The potential to 3D‑print manufacturing aids—jigs, fixtures, and even lightweight, ergonomically designed tools—adds further incentive.

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3D printing technologies used for railway parts

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Polymers dominate the rail sector’s 3D‑printed inventory, with Fused Filament Fabrication (FFF) and Selective Laser Sintering (SLS) the most common. These processes use high‑performance thermoplastics such as nylon and ULTEM, which must meet stringent fire‑safety standards (e.g., Rail Standard EN 45545‑2).

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Stratasys offers a flame‑retardant nylon that complies with EN 45545‑2, while Markforged recently launched a flame‑retardant nylon‑based composite aimed at rail, aerospace, automotive and defence applications.

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Metal 3D printing is also gaining traction. Selective Laser Melting (SLM) and Metal Binder Jetting enable production of aluminium, steel and titanium parts.

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3D printing applications in the railway industry

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Deutsche Bahn 3D‑prints a metal replacement part

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Deutsche Bahn has explored over 100 use cases for additive manufacturing, focusing on parts whose unavailability can cause up to a month of downtime.

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A notable example is a wheelset bearing cover for the Class 294 locomotive, introduced in the 1960s. Traditional casting would require large batch sizes and months of lead time.

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Using Wire Arc Additive Manufacturing (WAAM), a service bureau produced the 13 kg part in just seven hours, dramatically reducing both delivery time and cost.

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Siemens Mobility: 3D‑printed tooling

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At its RRX Rail Service Centre, Siemens Mobility uses 3D printing to create complex maintenance tools and spare parts.

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One key tool—a connector for train bogie maintenance—was fabricated with Stratasys FDM and ULTEM 9085. The result was a robust, custom‑shaped component that replaces a costly, outsourced solution.

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The company reports reduced reliance on external suppliers and lower per‑unit costs.

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Angel Trains’ exploration of 3D printing

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Angel Trains partners with Stratasys to 3D‑print interior components—armrests, grab handles, and seat‑back tables—on demand.

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Production of a single armrest now takes one week, a 94 % reduction from conventional methods.

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Using ULTEM 9085, which meets Rail Standard EN 45545‑2, the company also manufactures replacement grab handles. What would have cost £15 000 and taken two and a half months now completes in three weeks at a fraction of the price.

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Looking ahead, Angel Trains is prototyping Braille seat‑back tables to guide passengers to toilets, illustrating how 3D printing can enhance passenger experience.

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CAF’s achievements in 3D printing

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Since September 2016, Spanish manufacturer CAF has produced roughly 2 400 3D‑printed parts for its rolling stock—ranging from cup holders to door supports.

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CAF also leverages large‑scale 3D printing to fabricate external components up to several metres, such as a front‑end part for the Urbos tram, produced with a Super Discovery FFF printer from CNC Bárcenas.

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“The ability to create parts with complex geometries without moulds drastically shortens time‑to‑market,” says CAF’s engineering lead.

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Other examples

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Other rail giants are following suit. Bombardier is installing a Stratasys printer to accelerate production of interior and exterior components, while Wabtec has invested in GE Additive’s H2 binder‑jet system, targeting up to 250 components for AM.

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3D printing in the railway industry: A transformative impact

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The advantages of additive manufacturing are clear: rapid turnaround for obsolete parts, lower costs, and the ability to design complex, lightweight components.

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While many companies are still in the early stages, the long‑term payoff promises to reshape rail supply chains and maintenance operations, delivering tangible benefits for operators and passengers alike.