1. Introducció
Thank you for choosing the DEKO Professional 5-inch Angle Grinder, Model DKAG125G120S. This powerful and versatile tool is designed for demanding cutting and grinding applications on various materials such as metal, concrete, and stone. Featuring a 1200W motor and variable speed control from 3000 to 12000 RPM, it offers precision and efficiency for both professional and advanced users. Please read this manual carefully before operating the tool to ensure safe and optimal performance.

Figura 1: Mésview of the DEKO Professional 5-inch Angle Grinder.
2. Instruccions generals de seguretat
Seguiu sempre les precaucions de seguretat bàsiques per reduir el risc d'incendi, descàrrega elèctrica i lesions personals. Conserveu aquest manual per a futures consultes.
- Seguretat de l'àrea de treball: Mantingueu la zona de treball neta i ben il·luminada. No feu servir eines elèctriques en atmosferes explosives, com ara en presència de líquids, gasos o pols inflamables.
- Seguretat elèctrica: Els endolls de les eines elèctriques han de coincidir amb la presa de corrent. No modifiqueu mai l'endoll. Eviteu el contacte corporal amb superfícies connectades a terra. No exposeu les eines elèctriques a la pluja o a condicions humides.
- Seguretat personal: Always wear eye protection (safety glasses or goggles) and hearing protection. Use a dust mask if operations create dust. Wear appropriate work gloves. Dress properly; avoid loose clothing or jewelry.
- Ús i cura de l'eina: No forceu l'eina elèctrica. Feu servir l'eina elèctrica adequada per a la vostra aplicació. Desconnecteu l'endoll de la font d'alimentació abans de fer qualsevol ajust, canviar accessoris o guardar eines elèctriques.
- Retrocés i advertències relacionades: Kickback is a sudden reaction to a pinched or snagged rotating wheel. Always maintain a firm grip on the tool and position your body and arm to allow you to resist kickback forces.
3. Configuració
3.1 Desembalatge
Carefully remove the angle grinder and all accessories from the packaging. Inspect for any damage that may have occurred during shipping. Ensure all components listed in the package contents are present.
3.2 Fixació de la nansa auxiliar
The auxiliary handle can be screwed into one of the three threaded holes on the gear housing, depending on the application and your working preference. Always operate the angle grinder with the auxiliary handle securely attached for better control and safety.

Figure 2: Auxiliary handle properly installed on the angle grinder.
3.3 Installing/Changing Grinding Disc
- Assegureu-vos que l'eina estigui desconnectada de la font d'alimentació.
- Manteniu premut el botó de bloqueig de l'eix.
- Col·loqueu la brida interior al cargol.
- Position the grinding or cutting disc onto the inner flange, ensuring it is centered.
- Screw the outer flange (nut) onto the spindle.
- Use the provided spanner wrench to tighten the outer flange securely. Release the spindle lock.

Figure 3: Using the spanner wrench to secure the grinding disc.
3.4 Connexió a l'alimentació
Ensure the angle grinder's voltage (220V) matches your power supply. Plug the tool into a grounded electrical outlet. Always check the power cord for damage before each use.
4. Instruccions de funcionament
4.1 Inici i aturada de l'eina
To start the angle grinder, slide the ON/OFF switch forward. To stop, slide the switch backward to the OFF position. For continuous operation, some models may have a lock-on button; refer to the specific switch mechanism on your tool.

Figure 4: Location of the power switch for starting and stopping the tool.
4.2 Ajust de la velocitat
This model features variable speed control, allowing adjustment between 3000 and 12000 RPM. Use lower speeds for more delicate tasks or when working with heat-sensitive materials, and higher speeds for aggressive cutting and grinding. Adjust the speed using the dial or switch located on the tool body.
4.3 Proper Use for Cutting and Grinding
Always allow the disc to reach full operating speed before contacting the workpiece. Apply moderate, consistent pressure. Avoid excessive force, which can cause kickback or damage the disc and tool. Maintain a firm grip with both hands on the main handle and the auxiliary handle.

Figure 5: Demonstrating proper technique for cutting metal with the angle grinder.

Figure 6: Demonstrating grinding with a flap disc on the angle grinder.
5. Manteniment
Regular maintenance ensures the longevity and safe operation of your angle grinder. Always unplug the tool before performing any maintenance.
5.1 Neteja
Keep the ventilation openings clean and free from obstructions to prevent overheating. Use a soft brush or compressed air to remove dust and debris from the tool housing. Do not use water or chemical cleaners.
5.2 Inspecció de components
Regularly inspect the power cord for cuts, fraying, or damage. Check the auxiliary handle and disc guard for secure attachment and any signs of damage. Replace worn or damaged discs immediately.
5.3 Substitució de les escombretes de carbó
The carbon brushes are wear parts and should be checked periodically. When they are worn down, the motor performance may decrease, or the tool may stop working. Replace both carbon brushes simultaneously with genuine DEKO replacement parts. Consult a qualified service technician if you are unsure how to perform this task.
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| L'eina no s'inicia | No power supply; Damaged power cord; Worn carbon brushes; Faulty switch | Check power outlet and cord; Replace power cord; Replace carbon brushes; Contact service center |
| Vibració excessiva | Damaged or unbalanced disc; Loose flanges; Bent spindle | Replace disc; Tighten flanges; Contact service center |
| Sobreescalfament | Ranures de ventilació bloquejades; Sobrecarregar l'eina | Netegeu les ranures de ventilació; Reduïu la càrrega i deixeu que l'eina es refredi |
| Potència/velocitat reduïdes | Worn carbon brushes; Motor issue | Replace carbon brushes; Contact service center |
7. Especificacions
| Característica | Especificació |
|---|---|
| Número de model | DKAG125G120S |
| Voltage | 220 V |
| Freqüència | 60 Hz |
| Poder | 1200W |
| Velocitat sense càrrega | 3000-12000 RPM (variable) |
| Max Disc Diameter | 125 mm (5 polzades) |
| Fil de cargol | M14 |
| Material | Metall |
| Dimensions (L x A x A) | 41 x 13 x 11 cm |
| Components inclosos | Auxiliary Handle, 125mm Disc Guard, Adjustment Wrench |
8. Garantia i Suport
The DEKO Professional 5-inch Angle Grinder (Model DKAG125G120S) comes with a 1 any de garantia from the date of purchase, covering manufacturing defects. This warranty does not cover damage caused by misuse, abuse, normal wear and tear, or unauthorized repairs.
For warranty claims, technical support, or spare parts, please contact your authorized DEKO dealer or customer service. Keep your proof of purchase for warranty validation.