1. Introduction
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Bosch Professional GSB 18V-28 Cordless Hammer Drill. Please read these instructions carefully before using the tool and keep them for future reference.
2. Safety Instructions
Always observe general power tool safety warnings and instructions provided with the product. Failure to follow all instructions may result in electric shock, fire, and/or serious injury.
- Wear appropriate personal protective equipment (PPE) such as safety glasses, hearing protection, and gloves.
- Ensure the workpiece is securely fastened before drilling.
- Do not operate the tool in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Keep children and bystanders away while operating a power tool.
- Use the correct drill bit for the material being worked on.
3. Product Overview
The Bosch Professional GSB 18V-28 is a robust cordless hammer drill designed for various drilling and screwdriving applications in wood, metal, and masonry. It features a durable 13 mm all-metal chuck and Electronic Motor Protection (EMP) for extended tool life.
Figure 1: Bosch GSB 18V-28 Cordless Hammer Drill. This image shows the complete drill with a battery pack attached, highlighting its compact design.
Figure 2: Dimensions of the GSB 18V-28. This diagram illustrates the physical dimensions of the drill, showing a length of 202 mm and a height of 248 mm.
4. Setup
4.1 Battery Installation and Charging
The GSB 18V-28 operates with Bosch Professional 18V Lithium-Ion batteries (not included). Ensure the battery is fully charged before use.
- To insert the battery: Align the battery pack with the base of the tool and slide it in until it clicks into place.
- To remove the battery: Press the release button on the battery pack and pull it out.
- Charge the battery using a compatible Bosch Professional 18V charger according to the charger's instructions.
4.2 Chuck and Bit Installation
The drill features a 13 mm keyless chuck.
- Open the chuck by rotating the front sleeve counter-clockwise until the jaws are wide enough to insert the drill bit.
- Insert the drill bit fully into the chuck.
- Tighten the chuck by rotating the front sleeve clockwise until the bit is securely clamped. For hammer drilling, ensure the bit is specifically designed for impact use.
5. Operating Instructions
5.1 Mode Selection
The GSB 18V-28 offers multiple operating modes:
- Screwdriving Mode: For driving screws. Adjust the torque setting ring to the desired level.
- Drilling Mode: For drilling in wood and metal. Set the mode selector to the drill symbol.
- Hammer Drilling Mode: For drilling in masonry. Set the mode selector to the hammer drill symbol.
5.2 Speed Selection
The tool has two speed settings:
- Speed 1 (Low): For larger diameter drilling, screwdriving, and applications requiring high torque.
- Speed 2 (High): For smaller diameter drilling and applications requiring higher speed.
Use the speed selector switch located on top of the tool to choose between speed 1 and speed 2.
5.3 Starting and Stopping
To start the tool, press the ON/OFF switch. The tool speed is variable depending on how far the switch is pressed. To stop, release the ON/OFF switch.
Figure 3: User operating the Bosch GSB 18V-28. This image shows a person using the hammer drill to drill into a wall, demonstrating proper handling and safety gear.
6. Maintenance
Regular maintenance ensures optimal performance and extends the life of your tool.
- Cleaning: Keep the ventilation slots clean to prevent motor overheating. Use a soft brush or compressed air. Do not use water or chemical cleaners.
- Chuck Maintenance: Periodically clean the chuck jaws to ensure proper gripping of drill bits.
- Battery Care: Store batteries in a cool, dry place. Do not expose them to extreme temperatures or direct sunlight.
- Inspection: Regularly inspect the tool for any signs of damage, loose screws, or worn parts. Have any damaged parts repaired by an authorized service center.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool does not start. | Battery not charged or improperly inserted. | Charge battery; ensure it is fully inserted until it clicks. |
| Reduced power or speed. | Low battery charge; tool overloaded. | Recharge battery; reduce pressure on the tool. |
| Chuck not holding bit securely. | Chuck jaws dirty or worn. | Clean chuck jaws; if worn, replace chuck. |
| Excessive vibration. | Bent drill bit; loose chuck. | Replace bent bit; tighten chuck securely. |
8. Technical Specifications
| Feature | Specification |
|---|---|
| Model | GSB 18V-28 |
| Part Number | 06019H4000 |
| Voltage | 18 Volts |
| Max. Torque (Hard/Soft) | 63 Nm / 28 Nm |
| No-load Speed (1st/2nd gear) | 0-500 / 0-1900 RPM |
| Max. Impact Rate | 28500 bpm |
| Chuck Capacity | 1.5 - 13 mm |
| Max. Drilling Diameter (Wood) | 38 mm |
| Max. Drilling Diameter (Steel) | 13 mm |
| Max. Drilling Diameter (Masonry) | 13 mm |
| Weight (without battery) | 1.2 kg |
| Dimensions (L x W x H) | 202 x 78 x 204 mm |
9. Warranty and Support
Bosch Professional power tools are designed for durability and reliability. For warranty information, service, or technical support, please refer to the official Bosch Professional website or contact your local authorized Bosch service center.
Keep your purchase receipt as proof of purchase for warranty claims.
Note: This product is supplied without a battery or charger. These must be purchased separately.