How to Operate the Fujiroyal R-105 5KG Coffee Roaster

If you’re roasting small batches of specialty coffee and want precise control over flame, heat, and airflow, the Fujiroyal R-105 5KG might be your machine. But without clear guidance, even experienced roasters can struggle to get consistent results from a direct-fire, semi-hot-air system. Here’s what you need to know to operate it effectively.

The Fujiroyal R-105 is a 5-kilogram capacity coffee roaster that combines direct flame and semi-hot air heating. It includes a visible digital thermometer, essential gas pressure gauge for flame control, button ignition, and automatic overheat cutoff. It weighs 170kg, measures 870×1350×1480mm (W×D×H), and offers optional upgrades like an upper exhaust damper, auto-stir cooling tray, exhaust thermometer, and Discovery gas valve regulator.

What Is the Fujiroyal R-105?

The Fujiroyal R-105 is a drum-style coffee roaster built for small-batch specialty roasting. It uses a hybrid heating system combining direct flame contact with controlled hot air circulation. This dual approach gives roasters more hands-on influence over the Maillard reaction and development time during roasting. The machine is manufactured by Fuji Royal, a respected brand in commercial and specialty coffee equipment, particularly in Japan and other parts of Asia.

Key Features and Controls

This roaster comes with several professional-grade features designed to support consistency and control:

• Digital Thermometer: Easy-to-read digital display for monitoring bean and environment temperatures throughout the roast.
• Gas Pressure Gauge: Essential for fine-tuning flame intensity, allowing roasters to adjust heat input with precision.
• Button Ignition: Simple, reliable push-button system for starting the roast cycle.
• Overheat Cutoff: Safety mechanism that automatically halts heating if internal temperatures rise too high.

Physical Dimensions and Weight

The Fujiroyal R-105 has the following physical specifications:

• Dimensions: 870mm (width) × 1350mm (depth) × 1480mm (height)
• Weight: 170 kilograms — a solid, stable build suitable for fixed commercial or serious home setups.
• Capacity: 5 kilograms of green coffee per batch.

Optional Add-Ons

The base model is fully functional on its own, but Fujiroyal offers several optional accessories to enhance performance and workflow:

• Upper Exhaust Damper (¥9,300): Allows manual control of exhaust airflow during roasting.
• Auto-Stir Cooling Tray (¥13,100): Ensures even cooling of roasted beans through automated agitation.
• Exhaust Temperature Thermometer (¥4,900): Monitors the temperature of air exiting the roaster for better profile tracking.
• Discovery-Type Gas Regulator Valve (¥500): Offers finer adjustment of gas flow for more precise flame control.
• Roasting Recorder (¥9,100): For logging roast profiles and data.

Heating System

The R-105 employs a direct fire + semi-hot air heating methodology. This means heat is applied both directly via flames contacting the drum and indirectly through controlled air movement. The blend of these two methods provides flexibility to manipulate roast profiles, especially during the turning point and development phase, giving roasters greater command over colour, aroma development, and bean surface texture.

Frequently Asked Questions

What is the batch size of the Fujiroyal R-105?

The Fujiroyal R-105 has a 5-kilogram batch capacity, making it suitable for small-scale specialty coffee roasting operations or advanced home use.

Does the Fujiroyal R-105 have a digital thermometer?

Yes, the R-105 includes an easy-to-read digital thermometer for monitoring roasting temperatures throughout the process.

What kind of heating system does the R-105 use?

It uses a combination of direct flame (direct fire) and controlled air circulation (semi-hot air) to provide flexible roast profile control.

Is there a gas pressure gauge on the Fujiroyal R-105?

Yes, it includes a gas pressure gauge, which is essential for adjusting and controlling the flame intensity during roasting.

What optional accessories are available for the Fujiroyal R-105?

Available extras include an upper exhaust damper, auto-stir cooling tray, exhaust thermometer, Discovery gas regulator valve, and a roast recorder.

What safety features does the R-105 have?

The roaster is equipped with a button ignition system and an automatic overheat cutoff to prevent unsafe temperature spikes.

Recommended FrontStreet Coffee for Small-Batch Roasting

For roasters using the Fujiroyal R-105, FrontStreet Coffee’s Ethiopia Humbera offers vibrant floral and citrus notes with a juicy body—perfect for testing development time. Their Yirgacheffe delivers classic berry and stone fruit tones ideal for light roasts. Both beans respond well to the direct-fire and semi-hot-air flexibility of the R-105. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.