1. Introducció
This manual provides essential information for the safe and effective operation, setup, and maintenance of your Bosch GBH 2-28 DV Professional Rotary Hammer. Please read these instructions carefully before using the tool and keep them for future reference. The Bosch GBH 2-28 DV is a powerful 850W rotary hammer designed for drilling in concrete, masonry, wood, and metal, as well as for light chiseling applications.
Figura 1: Bosch GBH 2-28 DV Professional Rotary Hammer. This image shows the complete tool with its main body, handle, and chuck.
2. Instruccions generals de seguretat
Observeu sempre les següents precaucions de seguretat per evitar descàrregues elèctriques, incendis i lesions greus.
- Seguretat de l'àrea de treball: Mantingueu la vostra 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 de cap manera. Eviteu el contacte corporal amb superfícies connectades a terra. No exposeu les eines elèctriques a la pluja ni a condicions humides.
- Seguretat personal: Always wear eye protection. Use hearing protection when operating the tool for extended periods. Wear a dust mask when working in dusty conditions. Dress properly; avoid loose clothing or jewelry.
- Ús i cura de les eines elèctriques: 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.
- Servei: Feu que una persona de reparació qualificada faci reparar la vostra eina elèctrica que utilitzi només peces de recanvi idèntiques.
- Embragatge de sobrecàrrega: The tool is equipped with an overload clutch for user and tool protection in case of a jammed drill bit. If the drill bit jams, the drive to the drill spindle is interrupted. Due to the forces that occur, always hold the power tool firmly with both hands and assume a secure stance.
3. Components mésview
Familiarize yourself with the main components of your Bosch GBH 2-28 DV Rotary Hammer.
- SDS-plus Tool Holder
- Parada de profunditat
- Mànec auxiliar
- Mode Selector Switch (Drilling, Hammer Drilling, Chiseling)
- Rotation Stop Button (for chiseling)
- Activador de velocitat variable
- Lock-on Button for Continuous Operation
- Cable d'alimentació
- Active Vibration Control System
Figura 2: Auxiliary Handle and Depth Stop. This image highlights the ergonomic auxiliary handle and the depth stop mechanism, crucial for controlled drilling.
4. Configuració
4.1 Fixació de la nansa auxiliar
The auxiliary handle (3) allows for secure two-handed operation and can be rotated to any position for optimal working posture.
- Afloixeu la maneta auxiliar girant-la en sentit antihorari.
- Slide the handle over the chuck and position it as desired.
- Tighten the auxiliary handle by turning it clockwise until secure.
4.2 Installing the Depth Stop
The depth stop (2) is used to set a precise drilling depth.
- Insert the depth stop into the opening on the auxiliary handle.
- Adjust the depth stop to the desired drilling depth. The distance from the tip of the drill bit to the end of the depth stop indicates the drilling depth.
- Ensure the auxiliary handle is securely tightened to hold the depth stop in place.
5. Instruccions de funcionament
5.1 Connexió d'alimentació
Ensure the power tool's voltage rating matches your local power supply before plugging it in. The tool operates on a standard corded electric power source.
5.2 Inserting and Removing SDS-plus Drill Bits
The SDS-plus tool holder (1) allows for quick and tool-free accessory changes.
- S'està inserint: Clean the shank of the drill bit and apply a thin layer of grease. Insert the drill bit into the tool holder with a rotating motion until it locks. Pull on the drill bit to check if it is securely locked.
- Eliminació: Pull back the locking sleeve of the SDS-plus tool holder and remove the drill bit.
5.3 Selecció del mode de funcionament
Use the mode selector switch (4) to choose the desired operating mode:
- Perforació (només rotació): For drilling in wood, metal, ceramics, and plastic. Set the switch to the drill symbol.
- Hammer Drilling (Rotation with Hammer Action): For drilling in concrete and masonry. Set the switch to the hammer drill symbol.
- Chiseling (Hammer Action Only with Rotation Stop): For light chiseling work. Set the switch to the chisel symbol. Press the rotation stop button (5) to lock the chisel in the desired position.
Nota: Change the operating mode only when the tool is switched off to prevent damage.
5.4 Control de velocitat variable
The variable speed trigger (6) allows for infinitely variable speed adjustment. The harder you press the trigger, the higher the rotational speed. This feature is useful for starting holes precisely and adapting to different materials.
5.5 Continuous Operation (Lock-on Button)
For continuous operation, press the variable speed trigger (6) and then press the lock-on button (7). To switch off, press the variable speed trigger again.
6. Manteniment
Regular maintenance ensures the longevity and optimal performance of your rotary hammer.
- Neteja: Keep the ventilation openings of the power tool clean to prevent overheating. Regularly clean the SDS-plus tool holder to remove dust and debris.
- Lubricació: Apply a thin layer of grease to the shank of SDS-plus accessories before insertion to ensure smooth operation and reduce wear.
- Escombretes de carbó: If the tool shows excessive sparking or reduced performance, the carbon brushes may need inspection or replacement. This should be done by a qualified service technician.
- Emmagatzematge: Guardeu l'eina en un lloc sec i segur, fora de l'abast dels nens.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| L'eina no s'inicia. | No power supply; faulty power cord/plug; defective switch. | Check power connection. Inspect power cord/plug for damage. If switch is defective, contact service. |
| Rendiment de perforació reduït. | Worn drill bit; incorrect operating mode; carbon brushes worn. | Replace drill bit. Select correct operating mode. Have carbon brushes checked by service. |
| Hammer action not engaging. | Incorrect operating mode; tool holder dirty. | Ensure hammer drilling mode is selected. Clean SDS-plus tool holder. |
| Tool stops during operation (overload clutch). | Broca enganxada a la peça de treball. | Release the trigger, remove the tool from the workpiece, and clear the obstruction. Resume operation carefully. |
8. Especificacions tècniques
| Model | GBH 2-28 DV |
| Número de model de l'article | 0 611 267 1K0 |
| Marca | Bosch |
| Entrada de potència | 850 watts |
| Font d'alimentació | Elèctric amb cable |
| Velocitat de rotació màxima | 850 RPM |
| Ampedat | 14 Amps |
| Portaeines | SDS-plus |
| Drilling Capacity (Concrete, Hammer Drill Bits) | 4 - 28 mm |
| Drilling Capacity (Masonry, Core Cutters) | Fins a 68 mm |
| Capacitat de perforació (fusta) | Fins a 30 mm |
| Capacitat de perforació (metall) | Fins a 13 mm |
| Pes de l'article | 4.9 kg |
| Dimensions del producte (LxWxH) | 36 x 45 x 11.5 cm |
| Components inclosos | Auxiliary handle, carrying case, depth stop 210 mm |
9. Garantia i Suport
Bosch power tools are manufactured to the highest quality standards and undergo rigorous testing. This product comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Bosch weblloc.
For technical assistance, spare parts, or service, please contact Bosch customer support:
- Número d'atenció al client: 18004258665 (as per manufacturer info)
- Fabricant: Bosch Power Tools (Xina) Ltd.
- Importador/Empacador: Bosch Ltd., Apartat de correus núm.: 3000, Hosur Road, Adugodi, Bangalore - 560030, Índia.
Always provide the model number (GBH 2-28 DV) and item model number (0 611 267 1K0) when contacting support for efficient service.
