{"id":4098,"date":"2025-07-09T15:35:48","date_gmt":"2025-07-09T15:35:48","guid":{"rendered":""},"modified":"2025-07-09T15:48:00","modified_gmt":"2025-07-09T15:48:00","slug":"3d-printed-robot","status":"publish","type":"post","link":"https:\/\/wp.unionfab.com\/ja\/3d-printed-robot\/","title":{"rendered":"Guide to 3D Printing Robot Parts [+Cost Calculator]"},"content":{"rendered":"

Discover how 3D printing accelerates robot manufacturing with the right materials, design tips, and cost-saving strategies. Learn what parts to print and why.<\/p>\n

Introduction<\/h2>\n

Robotics is evolving rapidly\u2014from service bots and industrial arms to humanoid assistants and automated warehouses. Greater complexity brings tighter timelines, lower tooling budgets, and a need for flexible design. 3D printing meets these demands by delivering quick prototypes, low-volume runs, and intricate custom parts.<\/p>\n

In this article, we\u2019ll cover the top technologies and materials used for 3D printed robot parts, highlight which components are best suited for additive manufacturing, and provide practical design and cost-reduction tips based on real-world applications.<\/p>\n

Real-world Cases of 3D Printing in Robot Manufacturing<\/h2>\n

As 3D printing becomes more accessible and industrial-grade materials continue to improve, many leading institutions and companies are applying additive manufacturing to push the boundaries of robot design, functionality, and cost-efficiency.<\/p>\n

Below are several real-world examples that illustrate how 3D printing is transforming robot manufacturing:<\/p>\n

\"Real-world
<\/figcaption><\/figure>\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n
\n

Dimension<\/p>\n<\/th>\n

\n

MIT \u2013 Mini Cheetah Robot<\/p>\n<\/th>\n

\n

Festo \u2013 BionicSoftHand & BionicSoftArm<\/p>\n<\/th>\n

\n

Open Bionics \u2013 Hero Arm<\/p>\n<\/th>\n<\/tr>\n

\n

Application Focus<\/strong><\/p>\n<\/td>\n

\n

Structural lightweighting and rapid prototyping<\/p>\n<\/td>\n

\n

Soft robotics and biomimetic actuation<\/p>\n<\/td>\n

\n

Mass customization and low-cost wearable robotics<\/p>\n<\/td>\n<\/tr>\n

\n

3D Printing Technology<\/strong><\/p>\n<\/td>\n

\n

SLS (Selective Laser Sintering)<\/p>\n<\/td>\n

\n

FDM with flexible TPU<\/p>\n<\/td>\n

\n

SLA (Stereolithography)<\/p>\n<\/td>\n<\/tr>\n

\n

Parts 3D Printed<\/strong><\/p>\n<\/td>\n

\n

Mechanical legs, connecting joints, outer shell<\/p>\n<\/td>\n

\n

Soft joints, pneumatic fingers, integrated shells and air channels<\/p>\n<\/td>\n

\n

Customized outer shells, fingers, internal mechanical components<\/p>\n<\/td>\n<\/tr>\n

\n

Benefits and Outcomes<\/strong><\/p>\n<\/td>\n

\n

\u2022 Weight: only 9 kg, speed up to 3 m\/s
\u2022 Complex but strong structure
\u2022 Iteration time reduced to 2\u20133 days<\/p>\n<\/td>\n

\n

\u2022 Safe for human-robot interaction
\u2022 Biomimetic, flexible motion
\u2022 Ideal for handling soft or delicate objects<\/p>\n<\/td>\n

\n

\u2022 1\/10 the cost of traditional prosthetics
\u2022 Lightweight and kid-friendly
\u2022 Delivered in just a few days<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

In summary,<\/strong><\/p>\n

MIT \u2013 Mini Cheetah Robot<\/strong><\/p>\n

This case highlights how 3D printing enables complex geometry and topological optimization that would be difficult or impossible with traditional methods. It also dramatically shortened the development cycle from weeks to just a few days, making it a model example of academic and engineering agility in mobile robotics.<\/p>\n

Festo \u2013 BionicSoftHand<\/strong><\/p>\n

Traditional manufacturing struggles to produce complex, flexible structures. This case shows how 3D printing makes it possible to build safe, lightweight, biomimetic systems that can collaborate with humans. Festo\u2019s work is a global benchmark in soft robotics innovation.<\/p>\n

Open Bionics \u2013 Hero Arm<\/strong><\/p>\n

This project demonstrates how 3D printing can unlock affordable, scalable, and highly personalized robot products. The Hero Arm reduced production costs by up to 90% and enabled delivery within days\u2014turning high-tech prosthetics into an accessible consumer product.<\/p>\n

What 3D Printing Enables in Robotics<\/h2>\n

Drawing from the previous case studies, it’s clear that 3D printing is not just a tool for making parts\u2014it’s a strategic enabler of faster, more flexible, and more innovative robot development.<\/p>\n

The following points highlight how additive manufacturing empowers robotics teams by combining technical capabilities with practical advantages:<\/p>\n

Faster Development<\/strong><\/p>\n

    \n
  • \n

    Turn digital designs into physical parts in days. Quickly test fit, function, and form without waiting for tooling.<\/p>\n<\/li>\n<\/ul>\n

    Greater Design Freedom <\/strong><\/p>\n

      \n
    • \n

      Print complex shapes, internal channels, and lightweight structures that are hard or impossible to machine.<\/p>\n<\/li>\n<\/ul>\n

      No Tooling Required<\/strong><\/p>\n

        \n
      • \n

        Skip molds and jigs. Ideal for low-volume production and custom builds with minimal upfront cost.<\/p>\n<\/li>\n<\/ul>\n

        Lightweight, Strong Parts <\/strong><\/p>\n

          \n
        • \n

          Create optimized structures that reduce weight without sacrificing strength\u2014key for mobile and wearable robots.<\/p>\n<\/li>\n<\/ul>\n

          Easy Customization<\/strong><\/p>\n

            \n
          • \n

            Adapt robots to different users, tasks, or environments with quick design changes and no added tooling cost.<\/p>\n<\/li>\n<\/ul>\n

            Integrated Functions<\/strong><\/p>\n

              \n
            • \n

              Combine multiple parts\u2014like frames, cable paths, or actuators\u2014into single, printable components to simplify assembly.<\/p>\n<\/li>\n<\/ul>\n

              Robot Components Ideal for 3D Printing<\/h2>\n

              The following four categories highlight common parts produced and the benefits of using additive manufacturing for each.<\/p>\n

              1. Structural Components<\/h3>\n

              Common Parts 3D Printed:<\/strong><\/p>\n

                \n
              • \n

                Robot frames and skeletons<\/p>\n<\/li>\n

              • \n

                Outer housings and covers<\/p>\n<\/li>\n

              • \n

                Mechanical arms and support brackets<\/p>\n<\/li>\n<\/ul>\n

                Benefits of 3D Printing:<\/strong><\/p>\n

                  \n
                • \n

                  Enables lightweight structural design<\/strong> through topology optimization and hollow features<\/p>\n<\/li>\n

                • \n

                  Allows complex shapes<\/strong> that are difficult or impossible with traditional machining<\/p>\n<\/li>\n

                • \n

                  Shortens prototyping and iteration cycles<\/strong> for structural layouts<\/p>\n<\/li>\n

                • \n

                  Reduces material waste and improves design freedom<\/p>\n<\/li>\n<\/ul>\n

                  2. Customized End Effectors \/ Grippers<\/h3>\n

                  Common Parts 3D Printed:<\/strong><\/p>\n

                    \n
                  • \n

                    Suction cups, clamps, and soft grippers<\/p>\n<\/li>\n

                  • \n

                    Tool holders and robot wrist adapters<\/p>\n<\/li>\n

                  • \n

                    End-of-arm tooling for special objects<\/p>\n<\/li>\n<\/ul>\n

                    Benefits of 3D Printing:<\/strong><\/p>\n

                      \n
                    • \n

                      Enables fast and low-cost customization<\/strong> for non-standard or fragile objects<\/p>\n<\/li>\n

                    • \n

                      Supports frequent task changes<\/strong> with minimal delay<\/p>\n<\/li>\n

                    • \n

                      Avoids the need for tooling or machining<\/p>\n<\/li>\n

                    • \n

                      Ideal for small-batch, task-specific applications<\/strong><\/p>\n<\/li>\n<\/ul>\n

                      3. Soft Robotics & Bionic Components<\/h3>\n

                      Common Parts 3D Printed:<\/strong><\/p>\n

                        \n
                      • \n

                        Pneumatic actuators and soft fingers<\/p>\n<\/li>\n

                      • \n

                        Bionic joints and flexible linkages<\/p>\n<\/li>\n

                      • \n

                        Soft muscle structures and air channels<\/p>\n<\/li>\n<\/ul>\n

                        Benefits of 3D Printing:<\/strong><\/p>\n

                          \n
                        • \n

                          Facilitates biomimetic movement<\/strong> and high flexibility<\/p>\n<\/li>\n

                        • \n

                          Enables safe interaction<\/strong> with humans and sensitive environments<\/p>\n<\/li>\n

                        • \n

                          Combines function and form in a single printed part<\/strong>, reducing assembly<\/p>\n<\/li>\n

                        • \n

                          Expands design space for wearable and assistive robotics<\/p>\n<\/li>\n<\/ul>\n

                          4. Integrated Functional Parts<\/h3>\n

                          Common Parts 3D Printed:<\/strong><\/p>\n

                            \n
                          • \n

                            Structural components with built-in cable channels or cooling ducts<\/p>\n<\/li>\n

                          • \n

                            Mounting brackets with embedded threads<\/p>\n<\/li>\n

                          • \n

                            Panels with vibration dampening or snap-fit joints<\/p>\n<\/li>\n<\/ul>\n

                            Benefits of 3D Printing:<\/strong><\/p>\n

                              \n
                            • \n

                              Reduces part count by combining multiple functions into one component<\/strong><\/p>\n<\/li>\n

                            • \n

                              Simplifies assembly and maintenance<\/strong><\/p>\n<\/li>\n

                            • \n

                              Improves system reliability and compactness<\/strong><\/p>\n<\/li>\n

                            • \n

                              Supports design of modular or mobile platforms<\/strong> with fewer constraints<\/p>\n<\/li>\n<\/ul>\n

                              Comparison of 3D Printing Technologies Suitable for Robot Manufacturing<\/h2>\n

                              Here, we have compared common 3d printing technologies used in robot manufacturing to help you choose the most suitable one for your project.<\/p>\n

                              \"Comparison
                              <\/figcaption><\/figure>\n\n\n\n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n
                              \n

                              Technology<\/p>\n<\/th>\n

                              		\n

                              Materials<\/p>\n<\/th>\n

                              		\n

                              Strength & Durability<\/p>\n<\/th>\n

                              		\n

                              Surface Finish<\/p>\n<\/th>\n

                              		\n

                              Printing Precision<\/p>\n<\/th>\n

                              		\n

                              Cost<\/p>\n<\/th>\n

                              		\n

                              Typical Applications<\/p>\n<\/th>\n<\/tr>\n

                              \n

                              FDM (Fused Deposition Modeling)<\/a><\/p>\n<\/td>\n

                              		\n

                              Thermoplastics (e.g. PLA, ABS, PETG, TPU)<\/p>\n<\/td>\n

                              		\n

                              Moderate (can be reinforced with CF)<\/p>\n<\/td>\n

                              		\n

                              Moderate (visible layer lines)<\/p>\n<\/td>\n

                              		\n

                              \u00b10.2\u20130.5 mm<\/p>\n<\/td>\n

                              		\n

                              Low<\/p>\n<\/td>\n

                              		\n

                              Structural frames, brackets, tooling fixtures, soft grippers (TPU)<\/p>\n<\/td>\n<\/tr>\n

                              \n

                              SLA (Stereolithography)<\/a><\/p>\n<\/td>\n

                              		\n

                              Photopolymer resin<\/p>\n<\/td>\n

                              		\n

                              Moderate (brittle in some cases)<\/p>\n<\/td>\n

                              		\n

                              High (very smooth)<\/p>\n<\/td>\n

                              		\n

                              \u00b10.05\u20130.1 mm<\/p>\n<\/td>\n

                              		\n

                              Medium<\/p>\n<\/td>\n

                              		\n

                              Bionic parts, detailed mechanical components, prosthetics shells<\/p>\n<\/td>\n<\/tr>\n

                              \n

                              SLS (Selective Laser Sintering)<\/a><\/p>\n<\/td>\n

                              		\n

                              Nylon (PA12, PA11), composites<\/p>\n<\/td>\n

                              		\n

                              High (strong, tough, functional)<\/p>\n<\/td>\n

                              		\n

                              Matte & uniform<\/p>\n<\/td>\n

                              		\n

                              \u00b10.1\u20130.2 mm<\/p>\n<\/td>\n

                              		\n

                              High<\/p>\n<\/td>\n

                              		\n

                              Load-bearing parts, housings, functional end-use parts<\/p>\n<\/td>\n<\/tr>\n

                              \n

                              MJF
                              (Multi Jet Fusion)<\/a><\/p>\n<\/td>\n

                              		\n

                              Nylon (PA12), TPU<\/p>\n<\/td>\n

                              		\n

                              High (better isotropic strength than SLS)<\/p>\n<\/td>\n

                              		\n

                              Smooth & uniform (gray tone)<\/p>\n<\/td>\n

                              		\n

                              \u00b10.1 mm<\/p>\n<\/td>\n

                              		\n

                              High<\/p>\n<\/td>\n

                              		\n

                              Functional prototypes, integrated parts with internal channels<\/p>\n<\/td>\n<\/tr>\n

                              \n

                              DLP (Digital Light Processing)<\/p>\n<\/td>\n

                              		\n

                              Engineering-grade resins<\/p>\n<\/td>\n

                              		\n

                              Moderate to high (depending on resin)<\/p>\n<\/td>\n

                              		\n

                              High (smooth surface)<\/p>\n<\/td>\n

                              		\n

                              \u00b10.05 mm<\/p>\n<\/td>\n

                              		\n

                              Medium\u2013High<\/p>\n<\/td>\n

                              		\n

                              Small functional parts, connectors, detailed custom grippers<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                              Selection Tips (Quick Summary):<\/strong><\/p>\n

                                \n
                              • \n

                                Choose FDM<\/strong> when budget is limited, part size is large, high precision is not required, or flexible materials like TPU are needed.<\/p>\n<\/li>\n

                              • \n

                                Choose SLA\/DLP<\/strong> when high resolution, smooth surface finish, or fine details are critical\u2014ideal for small, aesthetic, or bionic components.<\/p>\n<\/li>\n

                              • \n

                                Choose SLS\/MJF<\/strong> for strong, functional parts with complex geometries and no need for support structures\u2014suitable for end-use or load-bearing components in robots.<\/p>\n<\/li>\n<\/ul>\n

                                Still unsure which tech to choose? Talk to Unionfab experts.<\/p>\n