1. Introduction
Thank you for choosing the CAFELFFE MK-303 Electric Coffee Grinder. This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your new coffee grinder. Please read these instructions carefully before first use and keep them for future reference.
2. Safety Instructions
To ensure safe operation and prevent damage, please observe the following safety precautions:
- Always connect the grinder to a grounded power outlet with the correct voltage (220V).
- Do not immerse the motor base in water or any other liquid.
- Keep hands and utensils away from the grinding burrs during operation.
- Unplug the grinder from the power outlet before cleaning, assembling, or disassembling parts.
- This appliance is not intended for use by persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
- Do not operate the grinder with a damaged cord or plug, or after the appliance malfunctions or has been damaged in any manner.
- Use only CAFELFFE recommended attachments.
- Do not use outdoors.
3. Product Overview
The CAFELFFE MK-303 is an advanced electric coffee grinder featuring 35 precise grind settings, a professional conical burr system, and anti-static technology for a superior coffee experience.
Key Features:
- 35 Precise Grind Settings: Accommodates various brewing methods from Turkish coffee to French press.
- Professional Grinding System: Equipped with high-hardness 420 stainless steel conical burrs and a 55-degree cutting angle, operating at a low speed of 400 RPM to minimize heat buildup and preserve flavor.
- Anti-Static Plasma Technology: Built-in plasma generator effectively eliminates static electricity, reducing mess and ensuring minimal residual grounds (<0.3g).
- Smart Touch Screen & Programmable Operation: Intuitive interface for selecting grind duration (0.5-36 seconds) and cup quantity (2-12 cups for Americano mode).
- Versatile Portafilter Holder: Detachable holder compatible with both 51mm and 58mm portafilters for hands-free grinding.
- Detachable & Washable Bean Hopper: Transparent 250-gram capacity bean hopper for easy monitoring, removal, and cleaning.
- Durable & Compact Design: Premium stainless steel body with compact dimensions (23 x 33.6 x 14.3 cm) and a weight of 2.2 kg, suitable for any kitchen.
Included Components:
- 1 x CAFELFFE MK-303 Coffee Grinder Body
- 1 x Cleaning Brush
- 1 x User Manual

Image: The CAFELFFE MK-303 Coffee Grinder, cleaning brush, and instruction manual.
4. Setup
- Unpack: Carefully remove all components from the packaging.
- Placement: Place the grinder on a stable, flat, and dry surface.
- Install Bean Hopper: Ensure the transparent bean hopper is securely placed on top of the grinder.
- Connect Power: Plug the power cord into a suitable 220V grounded electrical outlet.

Image: The CAFELFFE MK-303 Coffee Grinder with its bean hopper and portafilter bracket in place.
5. Operating Instructions
5.1. Filling the Bean Hopper
Open the lid of the bean hopper and pour fresh, whole coffee beans into it. The hopper has a capacity of 250 grams. Close the lid securely after filling.
5.2. Adjusting Grind Settings
The grinder offers 35 precise grind settings. Rotate the grind adjustment dial located below the bean hopper to select your desired fineness. Refer to the guide below for common brewing methods:
- Fine Grinding (Settings 0-10): Ideal for Espresso and Turkish coffee. (Consistency similar to salt)
- Medium Grinding (Settings 11-25): Suitable for Drip Coffee, Pour Over, and Aeropress. (Consistency similar to sugar)
- Coarse Grinding (Settings 26-35): Best for French Press and Cold Brew. (Consistency similar to sea salt)

Image: Visual guide to the 35 grind adjustment levels, showing fine, medium, and coarse settings with corresponding coffee types.
5.3. Using the Touch Screen Interface
The intuitive touch screen allows for precise control over your grinding process:
- Power Button: Press to turn the grinder on/off.
- Grind Duration Adjustment: Use the '+' and '-' buttons to set the grinding time from 0.5 to 36 seconds.
- Americano Mode: Select the Americano icon to choose between 2-12 cups, which automatically adjusts the grind duration for standard Americano servings.
5.4. Grinding Process
You can grind directly into a portafilter or use the included powder box.
- For Portafilter: Attach the appropriate portafilter (51mm or 58mm) to the detachable holder. Ensure it is securely in place for hands-free operation.
- For Powder Box: Place the included powder box directly under the grinding chute.
- Start Grinding: Press the start button on the touch screen. The grinder will operate for the programmed duration.
- Stop Grinding: The grinder will stop automatically after the set time. You can also press the start button again to stop it manually.

Image: The CAFELFFE MK-303 Coffee Grinder actively grinding coffee into a portafilter.

Image: Close-up of the detachable support bracket for hands-free grinding into a portafilter.
6. Maintenance and Cleaning
Regular cleaning ensures optimal performance and extends the lifespan of your grinder.
- Unplug: Always unplug the grinder before cleaning.
- Empty Hopper: Remove any remaining coffee beans from the hopper.
- Remove Components: Detach the bean hopper, portafilter holder, and powder box. These components are washable with warm soapy water. Rinse thoroughly and dry completely before reassembling.
- Clean Burrs: Use the included cleaning brush to remove coffee grounds from the conical burrs and grinding chute. Do not use water on the burrs or inside the grinding chamber.
- Wipe Exterior: Wipe the exterior of the grinder body with a damp cloth. Do not use abrasive cleaners or immerse the main unit in water.
- Anti-Static Feature: The built-in plasma generator helps keep the grinding area clean by reducing static, minimizing mess.

Image: The CAFELFFE MK-303 Coffee Grinder with its detachable bean hopper and the included cleaning brush, illustrating ease of maintenance.

Image: An illustration demonstrating the anti-static technology of the CAFELFFE MK-303, showing how the built-in plasma generator reduces static and powder splashing.
7. Troubleshooting
If you encounter any issues with your CAFELFFE MK-303, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Grinder does not turn on. | Not plugged in; power switch off; power outage. | Ensure the grinder is properly plugged in. Check the power switch. Verify power supply. |
| Grinder stops during operation. | Overheating; jammed burrs; bean hopper empty. | Unplug and let cool down. Unplug and carefully clear any obstructions from burrs. Refill bean hopper. |
| Inconsistent grind. | Burrs are dirty or worn; incorrect grind setting. | Clean the burrs thoroughly. Adjust to a finer or coarser setting as needed. |
| Excessive static/messy grounds. | Anti-static feature not working optimally; very dry beans. | Ensure the grinder is clean. Try misting beans lightly with water before grinding to reduce static. |
| Beans not feeding into burrs. | Hopper empty; beans stuck. | Refill hopper. Gently shake the grinder to dislodge beans (ensure power is off). |
8. Specifications
| Feature | Detail |
|---|---|
| Brand Name | CAFELFFE |
| Model Number | MK-303 |
| Color | Stainless Steel Silver |
| Material | Stainless Steel |
| Style | Modern |
| Item Weight | 2.2 kg |
| Product Dimensions (LxWxH) | 33.6 x 14.3 x 23 cm |
| Power | 150 W |
| Capacity (Bean Hopper) | 250 grams |
| Recommended Uses | Home, Office, Hotel |
| Specific Product Uses | Grinding |
| Manufacturer | Cafelffe |
| Voltage | 220 Volts |
| ASIN | B0G43DFQSN |

Image: Diagram showing the dimensions of the CAFELFFE MK-303 Coffee Grinder.
9. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your purchase documentation or visit the official CAFELFFE website. Keep your proof of purchase for warranty claims.





