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About us

Express is a professional engine model manufacturer committed to bringing mechanical wonders within reach

We believe that through building, tinkering, and bringing things to life, people of all ages can connect with the joy of creation — and discover the engineer within.

Currently operating four  miniature engine model brands: RETROL, HOWIN, SMETO, and ENJOMOR,we believe that through building, tinkering, and bringing things to life, people of all ages can connect with the joy of creation — and discover the engineer within.With a growing presence across North America, Europe, and Asia, Express is proud to share the art of mechanics with a global audience.

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Our vision is to become the world’s most trusted engine model brand — where education meets innovation, and play becomes a path to possibility.We want to help shape a generation of thinkers, makers, and future engineers.

Our mission is to ignite curiosity and creativity through the power of mechanical building.We believe that building something real — something that runs — is the most engaging way to learn, grow, and think like an engineer.

SMETO ENGINE

SEMTO ENGINE is a brand deeply rooted and dedicated to the field of science and education, specializing in engine models. The name SEMTO is derived from the abbreviation of “Science Education Model to Everyone,” reflecting our commitment to making mechanical engineering science education models accessible to DIY enthusiasts like yourself.

Through in-depth communication with STEAM experts from different regions and long-term collaboration with designers in the field of engine engineering education, we have introduced a variety of educational models, accumulating rich experience.

Every educational model in our collection undergoes meticulous scrutiny and research by our development and design team. We provide clear assembly instructions, and our powerful factory produces high-quality components for various models, ensuring a positive assembly and usage experience for every user. Building with your own hands, spreading knowledge, and understanding the mysteries of the mechanical engineering world.

We consistently uphold a spirit of scientific rigor in manufacturing various engine model educational tools. Our goal is to popularize mechanical engineering knowledge to a broader audience in an enjoyable and engaging manner. We aim to pass down the wisdom crystallized in the achievements of the world’s industrial civilization from generation to generation, ensuring its perpetuity.

Product

01

SEMTO ST-NF2 Red

Bold and dynamic, the red version exudes racing spirit.  Its high-simulation design and sporty accents capture thunderbolt speed.  CNC-machined aluminum ensures a refined, lightweight build.  Perfect for hands-on enthusiasts and collectors alike.

02

SEMTO ST-NF2 Sliver

Sleek and modern, the silver version highlights mechanical precision. With a compact CNC-machined structure, it’s both elegant and powerful. The realistic look brings the engine's core to life. Ideal for display, study, or DIY exploration.

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See why they love our engine model

As a retired engineer, assembling the SMETO dual-cylinder four-stroke engine brought back memories of my early career. Every component is precisely machined, with smooth edges and no burrs. The instructions are clear and detailed. I spent an afternoon slowly putting it together, and every step was a pleasure. It’s a hands-on experience I genuinely enjoyed.
Michael
I purchased this engine to demonstrate thermal engine principles to my college students. The SMETO engine’s transparent and detailed structure is perfect for showing how a four-stroke engine works. Students can clearly observe the pistons, crankshaft, and valve system in motion, which significantly enhances their understanding. It’s far more persuasive than textbook illustrations.
Edwards
The SMETO engine is an excellent entry-level product for beginners. It’s affordable, compactly designed, and comes with user-friendly documentation. As someone building a miniature engine for the first time, I finished the assembly in under two hours. The sense of achievement when it started up was indescribable
Miguel
This engine starts up effortlessly and runs with a deep, satisfying sound, just like a real gasoline engine. I hooked it up to the ignition system and added a bit of fuel—it fired right up. It runs smoothly on my desk, and the sound is actually quite soothing.
Lawrence M
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