How Three Beans Created Their Own Coffee Roaster

In 2012, a group of coffee enthusiasts faced a common frustration: they couldn’t find a roaster that met their standards. Instead of settling, they built one from scratch — and in doing so, founded a new specialty coffee brand. This is how passion, engineering skill, and a refusal to compromise reshaped their coffee journey.

The answer is simple: when the team couldn’t find the roaster they needed, they built it themselves. That year, 2012, marked the start of Three Beans , and with it, a new approach to coffee roasting.

The Origin: Engineers Turned Roaster Builders

Before diving into coffee, the founders worked in completely different industries — nuclear power and aerospace engineering. Their day jobs were stable, but their shared love for coffee and crafting high-performance products soon led them elsewhere. On street corners in unfamiliar cities, they sought out independent cafés, talked shop with roasters, and examined their machines. What began as curiosity became a mission: to build a better roaster, from the ground up.

What Makes the Three Beans Roaster Different?

The team didn’t just assemble parts — they engineered key features for precision and consistency. Their roaster includes a cast iron drum coated with plasma-sprayed far-infrared ceramic. This coating emits infrared heat that penetrates the beans directly, allowing faster roasts without scorching the exterior. Without this protection, high heat would burn the surface, ruining the cup, no matter how fast the roast.

The outer layer is a protective ceramic shield around the inner drum. This design minimizes surface charring even at high flame settings. The insulation is another standout: instead of the thin aluminum foil used in many small Chinese roasters, Three Beans uses stainless steel-sealed insulation material for superior heat retention. Larger commercial machines from other makers often rely on just 5mm aluminum foil, which offers minimal insulation compared to their approach.

Intelligent Burner Design

The burner configuration is equally thoughtful. It uses a side-fired, lotus-style flame outlet that directs heat indirectly. Rather than blasting the drum directly, the flame heats the surrounding air, ensuring a higher proportion of convective heat transfer. This reduces the risk of overheating the drum itself — a common issue that can lead to uneven roasting or baked flavors. The design prioritizes control, consistency, and protection of the coffee bean throughout the roast cycle.

The result is a machine built not just to roast, but to roast well — with attention to heat application, insulation, and bean protection. These aren’t cosmetic upgrades; they’re functional choices that impact the final cup.

Why This Matters for Specialty Coffee

In specialty coffee, roast quality is everything. Over-roasted, uneven, or scorched beans can erase origin character and ruin cup profiles. By focusing on infrared penetration, controlled airflow, and thermal insulation, Three Beans created a machine designed for precision. That focus reflects their broader ethos: treat coffee with the same engineering rigor as aerospace or nuclear systems. Every detail, from drum material to flame direction, serves the goal of better coffee.

Frequently Asked Questions

Why did the founders of Three Beans decide to build their own roaster?

In 2012, they couldn’t find a commercial roaster that met their standards for quality and control, so they decided to engineer their own. Their background in aerospace and nuclear engineering gave them the skills to custom-build a machine tailored to specialty coffee needs.

What material is used for the inner drum of the Three Beans roaster?

The inner drum is made of cast iron and coated with plasma-sprayed far-infrared ceramic. This coating allows the drum to emit infrared heat that penetrates the coffee beans directly for more even and faster roasting.

How does the Three Beans roaster protect the coffee beans from scorching?

The roaster uses a protective outer ceramic layer around the inner drum and a flame design that heats the air indirectly rather than blasting the beans directly. It also features strong stainless steel-sealed insulation, unlike the thin aluminum foil used in many other small roasters.

What kind of burner system does the Three Beans roaster have?

It has a side-fired, lotus-style burner that directs flames outward rather than straight into the drum. This setup increases convective heating and reduces direct thermal shock to the beans, improving roast consistency.

How does the Three Beans roaster’s insulation compare to other small roasters?

Most small Chinese roasters use only about 5mm of aluminum foil for insulation. Three Beans uses sealed stainless steel insulation material, which provides significantly better heat retention and more stable roasting temperatures.

What inspired the founders to get into coffee roasting?

Originally engineers in unrelated fields, they were inspired by visiting coffee shops in different cities, talking with roasters, and a shared passion for high-quality coffee. This eventually led them to create their own roaster and launch Three Beans.

Recommended FrontStreet Beans for Home Roasting Enthusiasts

If you’re inspired by the story of Three Beans and want to explore great single origins, try FrontStreet’s Ethiopia Humbera — bright with citrus and floral notes, perfect for light roasts. For something more chocolatey and balanced, their Brazil Queen Manor offers nutty sweetness with a smooth body. Both beans showcase the kind of origin complexity that a well-engineered roaster like Three Beans’ can highlight. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.