1. Uvod
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.
Slika 1: Bosch GBH 2-28 DV Professional Rotary Hammer. This image shows the complete tool with its main body, handle, and chuck.
2. Opća sigurnosna uputstva
Uvijek se pridržavajte sljedećih sigurnosnih mjera opreza kako biste spriječili strujni udar, požar i ozbiljne ozljede.
- Sigurnost radnog područja: Održavajte svoje radno mjesto čistim i dobro osvijetljenim. Ne koristite električne alate u eksplozivnim atmosferama, kao što je prisustvo zapaljivih tekućina, plinova ili prašine.
- električna sigurnost: Utikači električnih alata moraju odgovarati utičnici. Nikada ne modificirajte utikač ni na koji način. Izbjegavajte kontakt tijela sa uzemljenim površinama. Ne izlažite električne alate kiši ili vlazi.
- Lična sigurnost: 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.
- Upotreba i održavanje električnog alata: Ne forsirajte električni alat. Koristite odgovarajući električni alat za vašu primjenu. Isključite utikač iz izvora napajanja prije bilo kakvih podešavanja, promjene pribora ili skladištenja električnog alata.
- Usluga: Neka Vaš električni alat servisira kvalifikovana osoba za popravku koristeći samo identične zamjenske dijelove.
- Overload Clutch: 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 Overview
Familiarize yourself with the main components of your Bosch GBH 2-28 DV Rotary Hammer.
- SDS-plus Tool Holder
- Dubina Stop
- Auxiliary Handle
- Prekidač za odabir načina rada (bušenje, udarno bušenje, dlijeto)
- Rotation Stop Button (for chiseling)
- Okidač promjenjive brzine
- Lock-on Button for Continuous Operation
- Kabl za napajanje
- Active Vibration Control System
Slika 2: Auxiliary Handle and Depth Stop. This image highlights the ergonomic auxiliary handle and the depth stop mechanism, crucial for controlled drilling.
4. Podešavanje
4.1 Pričvršćivanje pomoćne ručke
The auxiliary handle (3) allows for secure two-handed operation and can be rotated to any position for optimal working posture.
- Loosen the auxiliary handle by turning it counter-clockwise.
- Slide the handle over the chuck and position it as desired.
- Tighten the auxiliary handle by turning it clockwise until secure.
4.2 Ugradnja graničnika dubine
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. Uputstvo za upotrebu
5.1 Priključak za napajanje
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.
- umetanje: 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.
- Uklanjanje: Pull back the locking sleeve of the SDS-plus tool holder and remove the drill bit.
5.3 Odabir načina rada
Use the mode selector switch (4) to choose the desired operating mode:
- Bušenje (samo rotacija): For drilling in wood, metal, ceramics, and plastic. Set the switch to the drill symbol.
- Udarno bušenje (rotacija s djelovanjem čekića): 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.
Napomena: Change the operating mode only when the tool is switched off to prevent damage.
5.4 Regulacija promjenjive brzine
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. Održavanje
Regular maintenance ensures the longevity and optimal performance of your rotary hammer.
- čišćenje: Keep the ventilation openings of the power tool clean to prevent overheating. Regularly clean the SDS-plus tool holder to remove dust and debris.
- podmazivanje: Apply a thin layer of grease to the shank of SDS-plus accessories before insertion to ensure smooth operation and reduce wear.
- Karbonske četke: 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.
- Skladištenje: Alat čuvajte na suhom, sigurnom mjestu, van dohvata djece.
7. Otkrivanje problema
| Problem | Mogući uzrok | Rješenje |
|---|---|---|
| Alat se ne pokreće. | No power supply; faulty power cord/plug; defective switch. | Check power connection. Inspect power cord/plug for damage. If switch is defective, contact service. |
| Smanjene performanse bušenja. | 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). | Drill bit jammed in workpiece. | Release the trigger, remove the tool from the workpiece, and clear the obstruction. Resume operation carefully. |
8. Tehničke specifikacije
| Model | GBH 2-28 DV |
| Broj modela stavke | 0 611 267 1K0 |
| Brand | Bosch |
| Power Input | 850 Watts |
| Izvor napajanja | Corded Electric |
| Maksimalna brzina rotacije | 850 RPM |
| AmpDob | 14 Amps |
| Alat Holder | SDS-plus |
| Drilling Capacity (Concrete, Hammer Drill Bits) | 4 - 28 mm |
| Drilling Capacity (Masonry, Core Cutters) | Do 68 mm |
| Kapacitet bušenja (drvo) | Do 30 mm |
| Kapacitet bušenja (metal) | Do 13 mm |
| Težina artikla | 4.9 kg |
| Dimenzije proizvoda (DxŠxV) | 36 x 45 x 11.5 cm |
| Uključene komponente | Auxiliary handle, carrying case, depth stop 210 mm |
9. Garancija i podrška
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 website.
For technical assistance, spare parts, or service, please contact Bosch customer support:
- Služba za korisničku podršku br: 18004258665 (as per manufacturer info)
- Proizvođač: Bosch Power Tools (China) Ltd.
- Uvoznik/Paker: Bosch Ltd., Poštanski pretinac br.: 3000, Hosur Road, Adugodi, Bangalore - 560030, Indija.
Always provide the model number (GBH 2-28 DV) and item model number (0 611 267 1K0) when contacting support for efficient service.
