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» » The 4D single disc machine: an essential tool for craftsmen

4D single brush sander

The 4D single brush: an essential tool for professionals


The 4D single brush is a professional-grade tool designed for high-quality work. This guide is your indispensable companion for understanding the intricacies of this machine and ensuring both your safety and that of your equipment. We highlight the potentially hazardous conditions for both the operator and the machine, emphasizing the crucial importance of familiarizing yourself with the equipment before getting started. By carefully following these best practices, you can maximize the efficiency of your 4D single brush while minimizing the risks associated with its use. You can never be too cautious.


For optimal use of the 4D dingle brush


This device is intended for professional use. The information in this manual highlights conditions that could be hazardous to the operator and/or the single brush machine. It is crucial to read this manual carefully and become familiar with the machine to understand the situations where these conditions might arise. Take all necessary steps to train the personnel who will be operating the machine. Report any damage to the machine or malfunctions immediately.


1. Hand and Clothing Safety: Keep hands and clothing away from rotating parts.

2. Hand Position: Keep hands on the machine handles while the motor is running.

3. Supervision: Do not leave the machine unattended while the motor is running.

4. Essential Equipment: Do not operate the machine without the dust skirts and/or abrasive discs.

5. Vacuum System: Always use the machine with a connected and operational vacuum system.

6. Removing the Vacuum System: Do not remove the vacuum system while the motor is running.

7. Disconnect Before Maintenance: Always unplug the power cable before performing maintenance on the machine.

8. Transport: Transport the machine carefully using both wheels.

9. Handling: Carry the single brush only by the two handles.

10. Ventilation: Always use the machine in well-ventilated areas.

11. Handling Sanding Dust: Never handle sanding dust.

12. Abrasive Discs: Use the abrasive discs provided with the device or those specified in the instruction manual.


By following these guidelines, you will ensure safe and effective use of your machine while protecting both the operator and the equipment.


Prevention warnings


When using the 4D single brush, several precautions are essential to ensure your safety. Sanding dust can become airborne and be inhaled, so it is crucial to wear an FFP3 NR D protective mask. Additionally, there is a risk of serious injury to the eyes and/or body if proper protective clothing or devices are not worn. Always wear safety glasses, protective clothing, and a dust mask. Finally, the noise levels generated during sanding can cause hearing damage if exposure is prolonged. To avoid this, always wear hearing protection. By adhering to these warnings, you effectively protect yourself from potential hazards associated with using the single brush. Better safe than sorry!


Potential hazards to be aware of


Using the 4D single brush involves several potential dangers that are crucial to know and prevent. Never use the machine if it is not fully assembled, as this can lead to personal injury and equipment damage. Ensure that all fastening components are closed and that settings are according to specifications. Using the brush without properly mounted and locked guards and covers can cause serious injuries or equipment damage. Guards and covers must always be in place and securely fastened.


Sanding floors can create an explosive environment. It is imperative to keep any sources of fire, such as cigarettes, lighters, and flames, away from the work area to avoid explosion risks. Poorly ventilated work areas can also become explosive in the presence of combustible materials. Ensure that the work area is always well-ventilated. For varnishes, read the manufacturer's instructions for the chemicals used to understand their flammability.


Nails encountered during sanding can spark. It is essential to remove all nails before beginning sanding. If the power circuit repeatedly trips or is undersized, there is a risk of death by electrocution. Have fuses, protection circuits, or the power line checked by a licensed electrician or REPEX FLOOR’s service department. Always unplug the machine before performing any maintenance or repair to avoid the risk of electrocution.


Using the machine on an ungrounded circuit can result in fatal electrocution. Never disconnect or disable the power cord's ground. If you are unsure about grounding, contact an electrician. Never use the machine if its power cord is damaged to avoid electric shocks, and do not pull on the cord to move the machine. Keep the power cord away from the bottom of the machine to prevent damage from abrasives, which could lead to electrocution.


Moving parts of the machine can cause severe injuries. Keep your hands, feet, and clothing away from all moving parts. Unplug the machine before performing any maintenance or replacing the plastic bag or filter pocket to avoid injuring the operator or nearby people. By following these warnings and taking necessary precautions, you can use the sander safely and minimize the risk of serious injuries and equipment damage.


Starting the 4D single brush


Before starting your 4D single brush, ensure that the vacuum system is properly positioned on the machine. It is also important to start the vacuum system before turning on the single brush to ensure effective dust extraction.


To start the machine, follow these steps:


1. Plug the machine into the electrical outlet.

2. Firmly hold the machine by the two handles and position the casing against your hip.

3. Press the safety button with your thumb.

4. Pull the lever towards you to start the machine.

5. Release the safety button.

6. To turn off the machine, simply release the lever.


By following these precautions and steps, you will ensure safe and effective operation of your 4D single brush.


Necessary periodic maintenance


To ensure optimal performance and extend the life of your machines, rigorous periodic maintenance of your 4D single brush is essential.


- Wheels: Regularly remove accumulated dirt from the machine body and wheels. Dirt accumulation can cause irregularities, such as "wave effects" on the sanded surface, compromising work quality.

- Bearings: Bearings should be periodically checked for wear or damage.

- Disc: Perform a check after the first 1,500 hours of operation.

- Motor: A check is necessary after the first 5,000 hours of operation.

- Spare Parts: Always use genuine REPEX FLOOR spare parts, available directly from the counter or online. Using non-original parts or repairs by unauthorized persons will void the warranty and associated responsibilities.

- After-Sales Service: For technical questions, additional product information, or to order spare parts, please contact our after-sales service. We are fully available to assist you.


By following these recommendations, you will ensure the reliability and longevity of your machines while maintaining high performance levels.


Signs that maintenance is needed


When working with your machines, encountering occasional breakdowns is inevitable. To avoid prolonged interruptions, it is crucial to recognize the signs of these breakdowns and know the initial troubleshooting steps.


If the machine refuses to start, the first thing to check is the power outlet. It may simply be unplugged. If that is not the case, the cause might be the thermal safety switch that has stopped the motor. In this case, let the machine cool down for 5 to 10 minutes before restarting. If the machine still does not work, the motor may be faulty, or the power cable may be damaged. For these issues, it is recommended to contact the manufacturer for assistance.


If the machine runs unevenly, the issue is often with the sanding accessory. A defective accessory should be replaced immediately. Sometimes, it’s enough to check if the accessory is properly centered on the drive disc. Improper centering can cause vibrations and uneven performance. Ensure everything is in place and adjusted.


Poor dust extraction can also be problematic. Often, this is due to a misaligned dust skirt. Check that it is properly positioned. If this does not solve the issue, the vacuum system itself might be poorly positioned or inadequately sized. Ensure that everything is correctly aligned and functional for effective dust extraction.


Finally, if the machine wobbles, it generally means the sanding accessory is improperly mounted. In this case, disassemble the accessory and reassemble it carefully, ensuring it is securely fixed.


By following these simple tips, you can often resolve common issues quickly and minimize work interruptions. However, for more complex problems or if you have doubts, it is always best to contact us for professional assistance.


The essential 4D single brush


In conclusion, this guide has provided you with essential information for the safe and effective use of your single brush. By following these guidelines, you not only ensure your safety and that of your equipment but also maximize the performance of your machine. It is important to note that the principles outlined here generally apply to all single brush machines on the market. Regardless of the brand or model you use, these guidelines remain relevant to ensure optimal and safe use. By adopting a proactive approach to safety, you can fully enjoy the benefits of your single brush while minimizing potential risks.

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