Introduction
The KoMo Fidibus 21 is a compact yet powerful grain mill designed for home use. It features a robust 250 W industrial motor and durable corundum/ceramic grinding stones, capable of milling 100 grams of fine flour per minute. Its elegant beech multiplex casing and solid wood hopper make it a functional and attractive addition to any kitchen. This manual provides essential information for the safe and efficient operation, maintenance, and care of your KoMo Fidibus 21 grain mill.

Image: Front view of the KoMo Fidibus 21 Grain Mill, showcasing its wooden casing and hopper.
Important Safety Instructions
- Always ensure the mill is placed on a stable, level surface before operation.
- Do not immerse the appliance in water or other liquids.
- Keep hands and foreign objects away from the grinding mechanism during operation.
- Unplug the mill from the power outlet before cleaning or maintenance.
- This appliance is designed for grinding dry grains and spices only. Do not grind oily seeds, coffee beans, or wet ingredients, as this can damage the grinding stones.
- Ensure the power cord is not damaged and is kept away from hot surfaces.
- This device has TÜV GS certification for tested safety.
Setup
- Unpacking: Carefully remove the grain mill from its packaging. Retain packaging for future transport or storage.
- Placement: Place the mill on a clean, dry, and stable countertop or table. Ensure there is adequate space around the unit for ventilation and operation.
- Power Connection: Plug the power cord into a suitable electrical outlet. Ensure the voltage matches the specifications of the appliance.

Image: Side view of the KoMo Fidibus 21 Grain Mill, showing the power switch located on the lower right side of the unit.
Operating Instructions
- Prepare Grains: Ensure grains are clean and dry. The hopper capacity is 850g for wheat.
- Place Collection Bowl: Position a bowl or container under the flour chute to collect the milled flour.
- Adjust Fineness: The fineness of the grind is adjusted by rotating the hopper. Turn the hopper clockwise for a finer grind and counter-clockwise for a coarser grind. The adjustment scale is located on the front of the mill, marked from "Fein" (fine) to "Grob" (coarse).
- Start Milling: Turn on the mill using the power switch.
- Add Grains: Slowly pour the grains into the hopper. The mill will begin grinding immediately.
- Milling Tip: For very fine flour, especially with harder grains, it is recommended to perform a coarser grind first, then pass the flour through the mill a second or third time at a finer setting. This helps prevent the flour from overheating and preserves its quality.
- Stop Milling: Once all grains have been milled, turn off the mill using the power switch.

Image: Close-up view of freshly milled flour being dispensed from the KoMo Fidibus 21 into a red bowl.
Maintenance and Cleaning
Regular cleaning ensures optimal performance and longevity of your grain mill.
- Unplug: Always unplug the mill from the power outlet before cleaning.
- Empty Hopper: Ensure the hopper is empty of grains.
- Clean Grinding Chamber: The grinding mechanism can be easily opened without tools. Rotate the hopper counter-clockwise until it can be lifted off. Use a small brush to clean any flour residue from the grinding stones and chamber.
- Cleaning After Oily Grains (if applicable): If you have milled any slightly oily grains (though generally not recommended for this mill), it is advisable to grind a small amount of rice afterwards. This helps to clean and dry the grinding stones.
- Exterior Cleaning: Wipe the exterior of the mill with a dry or slightly damp cloth. Do not use abrasive cleaners or immerse the unit in water.
- Reassembly: Place the hopper back onto the unit and rotate it clockwise until it locks into place.
- Interchangeable Mechanism: The grinding mechanism (grinding chamber and stones) of the Fidibus 21 is interchangeable. A removable grinding stone is available as an accessory to convert this product into a spice mill.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mill does not start. | Not plugged in; power switch off; power outage. | Check power connection; ensure switch is on; check household power. |
| No flour or very little flour is dispensed. | Hopper empty; grinding stones clogged; fineness set too fine for grain type. | Add more grain; clean grinding chamber; adjust to a coarser setting. |
| Flour is too coarse/fine. | Fineness setting incorrect. | Adjust the hopper rotation to achieve desired fineness. |
| Unusual noise during operation. | Foreign object in grinding chamber; grinding stones misaligned. | Immediately turn off and unplug. Open the grinding chamber and inspect for foreign objects. If problem persists, contact customer support. |
| Mill overheats. | Continuous operation for too long; grinding very hard grains at a very fine setting. | Turn off the mill and allow it to cool down. Consider grinding in stages (coarse then fine) for large quantities or hard grains. |
Technical Specifications
- Model: Fidibus 21
- Brand: KoMo
- Motor Power: 250 W
- Grinding Capacity: 100 g of fine flour per minute
- Hopper Capacity: 850 g (wheat)
- Grinding Mechanism: Corundum/Ceramic stones, continuously adjustable
- Housing Material: Solid Beech Multiplex wood
- Dimensions (L x W x H): 15.5 cm x 16 cm x 33 cm (6.1 x 6.3 x 13 inches)
- Weight: 6.2 kg (13.67 lbs)
- Recommended Use: Grinding soft grains (e.g., wheat, spelt, rye, einkorn) and spices.
- Certifications: TÜV GS tested safety
- Manufacturer Part Number: Fi-21
- UPC: 793573282163

Image: The KoMo Fidibus 21 Grain Mill with its dimensions (height 33cm, width 16cm, depth 15.5cm) clearly indicated.
Warranty and Support
KoMo products are known for their quality and durability. For specific warranty details, please refer to the warranty card included with your product or visit the official KoMo website. In case of technical issues or questions regarding your KoMo Fidibus 21 grain mill, please contact KoMo customer support through their official channels.
It is recommended to register your product upon purchase to facilitate any warranty claims or support requests.