1. Introduction
This manual provides essential information for the safe and effective operation, setup, and maintenance of your Bosch Professional GBH 2-26 F Rotary Hammer. Please read these instructions carefully before using the tool and keep them for future reference. The GBH 2-26 F is a corded combined hammer drill designed for drilling and chiseling in concrete, masonry, wood, and metal, featuring an SDS plus chuck system and an interchangeable quick-change chuck.
2. Safety Instructions
Always observe the following safety precautions to prevent electric shock, fire, and serious injury.
General Power Tool Safety Warnings
- Work Area Safety: Keep the work area clean and well-lit. Cluttered or dark areas invite accidents. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Electrical Safety: Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Avoid body contact with earthed or grounded surfaces such as pipes, radiators, ranges, and refrigerators.
- Personal Safety: Always wear eye protection. Use hearing protection when operating the tool for extended periods. Wear a dust mask if operations create dust. Dress properly; do not wear loose clothing or jewelry. Keep hair, clothing, and gloves away from moving parts.
- Power Tool Use and Care: Do not force the power tool. Use the correct power tool for your application. Disconnect the plug from the power source and/or remove the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools.
- Service: Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
3. Product Overview
Included Components
- Bosch Professional GBH 2-26 F Rotary Hammer
- Auxiliary Grip
- Depth Stop
- Cleaning Cloth
- Quick Change Chuck (13mm)
- SDS Plus Interchangeable Chuck
- Carrying Case
Key Features
- Powerful Motor: 830 watts, delivering 2.7 J of impact energy for efficient drilling and chiseling.
- SDS Plus System: For quick, tool-free bit changes and optimal power transfer.
- Interchangeable Chucks: Includes both SDS Plus and a 13mm Quick Change Chuck for versatility with various drill bits.
- Multiple Operating Modes: Rotary drilling, hammer drilling, and chiseling (with Vario Lock for chisel positioning).
- Variable Speed Control: For precise control and adaptation to different materials.
- Reversible Swivel: Allows for both forward and reverse rotation.
Figure 1: Bosch Professional GBH 2-26 F Rotary Hammer with auxiliary grip and depth stop attached. The tool is blue and black, featuring the Bosch Professional logo.
4. Setup
4.1 Attaching the Auxiliary Grip
- Loosen the auxiliary grip by turning it counter-clockwise.
- Slide the grip onto the tool's collar to the desired position.
- Tighten the grip by turning it clockwise until secure.
4.2 Changing Chucks (SDS Plus / Quick Change)
- Ensure the tool is unplugged from the power source.
- To remove the SDS Plus chuck: Pull back the locking sleeve on the chuck and pull the chuck forward to detach it from the tool.
- To attach the Quick Change Chuck: Align the chuck with the tool's spindle and push it firmly until it clicks into place. Ensure it is securely locked.
- To attach the SDS Plus chuck: Align the chuck with the tool's spindle and push it firmly until it clicks into place.
4.3 Inserting Drill Bits / Chisels
- For SDS Plus Chuck: Clean the shank of the drill bit/chisel. Insert the bit into the chuck with a slight twisting motion until it locks. Pull on the bit to ensure it is securely seated.
- For Quick Change Chuck (13mm): Open the chuck jaws by turning the chuck sleeve. Insert the cylindrical drill bit. Tighten the chuck jaws firmly by hand.
4.4 Setting the Depth Stop
- Insert the depth stop rod into the hole on the auxiliary grip.
- Adjust the rod to the desired drilling depth.
- Tighten the auxiliary grip to secure the depth stop.
5. Operating Instructions
5.1 Selecting Operating Mode
The mode selector switch allows you to choose between three operating modes:
- Rotary Drilling (Drill Symbol): For drilling in wood, metal, ceramics, and plastics. Use with the Quick Change Chuck and cylindrical drill bits.
- Hammer Drilling (Hammer and Drill Symbol): For drilling in concrete and masonry. Use with the SDS Plus chuck and SDS Plus drill bits.
- Chiseling (Chisel Symbol): For light chiseling work. Use with the SDS Plus chuck and chisels. The Vario Lock function allows for adjusting the chisel position.
To change the mode, rotate the selector switch to the desired symbol. Ensure the tool is not running when changing modes.
5.2 Variable Speed Control
The trigger switch provides variable speed control. Pressing the trigger further increases the speed. This allows for precise starting of drilling and adaptation to different materials.
5.3 Reversible Swivel (Rotation Direction)
The direction of rotation can be changed using the reversible swivel switch, typically located near the trigger. This is useful for removing jammed drill bits or for driving/removing screws (if using appropriate accessories and chuck).
Figure 2: A worker using the Bosch Professional GBH 2-26 F Rotary Hammer to drill into a concrete ceiling, demonstrating typical application in a construction environment. The worker is wearing appropriate safety gear including a hard hat, safety glasses, and ear protection.
6. Maintenance
6.1 Cleaning
- Always unplug the tool before cleaning.
- Keep the ventilation openings clean to prevent overheating.
- Wipe the tool housing with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Regularly clean the SDS Plus chuck and lubricate it with a thin layer of grease to ensure smooth operation.
6.2 Storage
Store the tool in its carrying case in a dry, secure location, out of reach of children and unauthorized users.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start | No power supply; faulty switch; damaged cord. | Check power connection. Inspect cord for damage. If problem persists, seek professional service. |
| Reduced drilling/chiseling performance | Worn drill bit/chisel; incorrect mode selected; insufficient pressure. | Replace worn accessories. Ensure correct operating mode is selected. Apply appropriate pressure. |
| Chuck not holding bit securely | Chuck jaws worn or dirty; bit shank not fully inserted. | Clean chuck and bit shank. Ensure bit is fully inserted and locked. If chuck is worn, replace it. |
| Excessive vibration or noise | Damaged internal components; loose parts. | Discontinue use and seek professional service. |
8. Technical Specifications
| Brand | Bosch Professional |
| Model Number | 06112A4000 (GBH 2-26 F) |
| Power Source | Corded Electric |
| Wattage | 830 watts |
| Voltage | 230 Volts |
| Amperage | 2.03 Amps |
| Impact Energy | 2.7 Joules |
| Maximum Rotational Speed | 900 RPM |
| Maximum Chuck Size | 26 Millimeters (SDS Plus) |
| Drilling Capacity (Concrete) | Max 26 mm |
| Drilling Capacity (Wood) | 30 Millimeters |
| Drilling Capacity (Metal) | 26 Millimeters |
| Item Weight | 3.29 Kilograms (7.24 pounds) |
| Product Dimensions | 1.76"L x 0.46"W x 1.42"H |
| Special Feature | Quick Change Chuck |
9. Warranty and Support
9.1 Warranty Information
Bosch Professional power tools are manufactured to the highest quality standards. For specific warranty terms and conditions applicable to your region, please refer to the warranty card included with your product or visit the official Bosch Professional website.
9.2 Customer Support
For technical assistance, spare parts, or service inquiries, please contact your local authorized Bosch Professional service center or visit the Bosch Professional website for contact details.
Website: www.bosch-professional.com
