1. Introduction
The Bosch GSB 185-LI is a versatile 18V brushless cordless impact drill designed for various applications including wood drilling, metal drilling, brick wall drilling, and screwing. Its compact and lightweight design makes it suitable for a wide range of tasks, offering powerful performance and durability.
2. General Safety Instructions
Always observe basic safety precautions when using power tools to reduce the risk of fire, electric shock, and personal injury.
- Read all instructions and safety warnings provided with the tool before operation.
- Wear appropriate personal protective equipment, including eye protection, hearing protection, and gloves.
- Keep your 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.
- Keep children and bystanders away while operating a power tool.
- Ensure the battery pack is fully charged and properly inserted before use.
- Always secure the workpiece before drilling or screwing.
- Maintain proper footing and balance at all times.
3. Components Overview
Familiarize yourself with the key components of your Bosch GSB 185-LI impact drill:

- Metal Collet: For securely holding drill bits and screwdriver bits.
- Compact Body: Lightweight and ergonomic design for comfortable use.
- Brushless Motor: Provides efficient power, longer runtime, and extended tool life.
- Smart LED Lights: Illuminates the work area for better visibility.
- Battery Indicator: Displays the remaining battery charge level.
- Bosch Professional 18V Battery System: Compatible with all Bosch Professional 18V batteries.
- Torque Adjustment Ring: For selecting desired torque settings.
- Mode Selector: For switching between screwing, drilling, and impact drilling modes.
- Forward/Reverse Switch: Controls the direction of rotation.
- Variable Speed Trigger: Allows for precise speed control.
4. Setup
4.1 Battery Installation and Removal
Ensure the battery is fully charged before first use. The GSB 185-LI uses the Bosch Professional 18V Battery System.
- To Install: Align the battery pack with the base of the tool and slide it in until it clicks securely into place.
- To Remove: Press the release button on the battery and slide it out.
4.2 Chuck and Bit Installation

- Twist the chuck counter-clockwise to open the jaws.
- Insert the drill bit or screwdriver bit fully into the chuck.
- Twist the chuck clockwise to tighten it securely. Ensure the bit is centered and firmly gripped.
5. Operating Instructions
5.1 Powering On/Off and Speed Control
- Press the trigger switch to start the tool. Release the trigger to stop.
- The tool features a variable speed trigger for precise control. Pressing the trigger further increases the speed.
- The no-load speed ranges from 0-500 RPM (low gear) to 0-1900 RPM (high gear).
5.2 Direction of Rotation
- Use the forward/reverse switch located above the trigger to select the desired rotation direction.
- Push the switch to the left for forward (clockwise) rotation.
- Push the switch to the right for reverse (counter-clockwise) rotation.
5.3 Mode Selection and Torque Settings

The GSB 185-LI offers three main operating modes. Rotate the collar near the chuck to select the desired mode:

- Screw Mode: For driving screws. Adjust the torque ring to the appropriate setting (1-20) to prevent overtightening or stripping screw heads.
- Flat Drill Mode: For drilling into wood, metal, and plastics. Use higher speed settings for smaller bits and softer materials, and lower speeds for larger bits and harder materials.
- Impact Drill Mode: For drilling into masonry and brick walls. This mode engages a hammering action for faster penetration.
5.4 Applications


The GSB 185-LI is suitable for a variety of tasks:
- Wood Drilling: Use appropriate wood drill bits and select Flat Drill Mode.
- Metal Drilling: Use appropriate metal drill bits and select Flat Drill Mode. Apply steady pressure and use cutting fluid if necessary.
- Brick Wall Drilling: Use masonry drill bits and select Impact Drill Mode.
- Screwing: Use appropriate screwdriver bits and select Screw Mode. Adjust the torque setting to match the screw size and material.
Video 1: Overview of the Bosch GSB 185-LI's features and applications.
6. Maintenance
- Cleaning: Keep the tool clean and free from dust and debris. Use a soft, damp cloth for cleaning. Do not use harsh chemicals or abrasive cleaners.
- Chuck Inspection: Regularly check the chuck for wear and ensure it grips bits securely. Replace if worn or damaged.
- Storage: Store the tool and batteries in a dry, cool place, away from direct sunlight, moisture, and extreme temperatures.
- Battery Care: Do not store batteries in a discharged state. Charge them periodically if not in use for extended periods.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool not starting | Battery discharged or not properly inserted. | Charge the battery. Ensure the battery is fully seated and clicked into place. |
| Reduced power/performance | Low battery charge; incorrect mode/torque setting for the task. | Recharge the battery. Select the appropriate mode and adjust the torque setting. |
| Drill bit slipping in chuck | Chuck not tightened sufficiently; worn drill bit shank; damaged chuck jaws. | Ensure the chuck is tightened securely. Replace worn drill bits. If chuck is damaged, seek professional service. |
| Overheating | Prolonged heavy use; blocked ventilation slots. | Allow the tool to cool down. Clear any obstructions from ventilation slots. |
8. Specifications

| Feature | Specification |
|---|---|
| Brand Name | Bosch |
| Model Number | GSB 185-LI |
| Rated Voltage | 18V |
| Motor Type | Brushless |
| Power Source | Battery |
| Drill Type | Cordless Impact Drill |
| Use | Home DIY |
| No Load Speed | 0-1900rpm |
| Rated Torque | 50/21N.m |
| Max. Drilling Diameter | 35MM |
| Shock Frequency | 27,000bpm |
| Weight | 1.03kg |
| Battery Included | No |
| Certification | CE, FCC |
| Origin | Mainland China |
9. User Tips
- Battery and Charger: The Bosch GSB 185-LI is typically sold as a bare tool. Batteries and chargers are usually sold separately. Ensure you have a compatible Bosch Professional 18V battery and charger for operation.
- Optimal Performance: For best results, always use sharp, high-quality drill bits and screwdriver bits appropriate for the material you are working with.
- Tight Spaces: The compact body of the GSB 185-LI makes it ideal for working in tight or confined spaces.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Bosch website or contact your authorized Bosch dealer. Keep your purchase receipt as proof of purchase for any warranty claims.





