1. Introduction
The Bosch GOP18V-28 18V StarlockPlus® Oscillating Multi-Tool is designed for versatile applications, offering enhanced power and a compact design. This manual provides essential information for the safe and effective use of your tool.

Image 1: BOSCH GOP18V-28N 18V EC Brushless Oscillating Multi-Tool (Bare Tool).
2. Safety Information
WARNING: Read all safety warnings, instructions, illustrations, and specifications provided with this power tool and charger. Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE.
- Use only Bosch 18V Li-ion battery packs. Use of any other battery packs may create a risk of injury and fire.
- Use only Bosch 18V chargers. Use of any other chargers may create a risk of injury and fire.
- Always inspect accessories for damage before each use. Never use if damage is suspected.
- Wear protective gloves when changing cutting accessories. Accessories become hot during use.
- Hold the power tool by insulated gripping surfaces when performing an operation where the cutting accessory may contact hidden wiring. Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.
- Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperature above 265 °F may cause explosion.
3. Product Features
- Starlock 3-D Tool-Accessory Interface: Delivers three-dimensional blade grip for more torque transfer.
- Multi-Tool Versatility: Accomplish flush-cutting, plunge-cutting, sanding, grinding, and many other tasks.
- Dynamic Accessory Range: Utilizes all Starlock and StarlockPlus accessories.
- Corded-Like Performance: Power and speed comparable to the corded Bosch GOP40-30 StarlockPlus oscillating tool.
- EC Brushless Motor Technology: Offers better efficiency than previous-generation 18V motors for increased runtime and exceptional motor life in an ultra-compact design.
- Wide 2.8° Oscillating Arc: Provides better accessory utilization and increased productivity.
- Snap-In Toolless Accessory Attachment and Release Lever: Allows for no-touch, easy release of blade; no more burned fingers.
- LED Light: For illumination in dark work areas.
- Flush-Cutting Design: Built to accomplish flush cuts such as doorjambs cuts using various plunge or segment blades.
- Constant Response Circuitry: Maintains the desired speed under load.

Image 2: Key features of the BOSCH GOP18V-28N, including the Starlock interface, LED light, and variable speed dial.
4. Setup
4.1 Battery Installation
The GOP18V-28N is a bare tool and requires an 18V Bosch Li-ion battery (sold separately). To install the battery, align it with the battery slot at the rear 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.
Video 1: Demonstrates the ease of installing and removing a Bosch 18V battery from a tool, highlighting the smooth connection.
4.2 Blade Attachment
The StarlockPlus interface allows for quick and toolless accessory changes. To attach a blade:
- Ensure the tool is off and the battery is removed.
- Pull the accessory release lever on the tool head.
- Align the Starlock blade with the 3-D interface on the tool.
- Push the blade firmly onto the interface until it snaps into place. The blade can be positioned at various angles.
- Release the lever to secure the blade.
To remove a blade, simply pull the release lever, and the blade will drop out without needing to touch it, which is beneficial if the blade is hot.
Video 2: Illustrates the quick and easy, tool-free blade attachment and removal process using the StarlockPlus interface.

Image 3: A selection of Starlock and StarlockPlus accessories available for various applications.
5. Operation
5.1 Powering On/Off and Speed Control
To power on the tool, slide the red on/off switch located on the top of the tool. The variable-speed dial allows you to set the optimal speed for the task, ranging from 8,000 to 20,000 oscillations per minute. The Constant Response circuitry maintains the selected speed under load for consistent performance.
5.2 LED Work Light
The integrated LED light illuminates the work area, providing better visibility in dimly lit spaces. This feature activates when the tool is powered on.
5.3 Applications
The GOP18V-28N is highly versatile and can be used for:
- Flush-Cutting: Ideal for cutting door jambs or other materials flush with a surface.
- Plunge-Cutting: Perfect for making precise cutouts in various materials.
- Sanding: With appropriate sanding pads, the tool can be used for surface preparation.
- Grinding: Suitable for grinding tasks with specific grinding accessories.
- Scraping: Effective for removing old paint, adhesive, or other materials.

Image 4: The oscillating multi-tool in action, demonstrating its capability for cutting wood.

Image 5: The tool being used to cut a metal pipe, showcasing its versatility across materials.
Video 3: An official Bosch video demonstrating the GOP18V-28 StarlockPlus Oscillating Multi-Tool's features and various applications.
6. Maintenance
- Cleaning: Keep the tool and its ventilation openings clean to ensure proper operation and prevent overheating. Use a soft, damp cloth for cleaning.
- Blade Care: Regularly inspect blades for wear and damage. Replace dull or damaged blades promptly to maintain cutting efficiency and safety. Carbide blades offer extended life.
- Battery Care: Store batteries in a cool, dry place. Do not expose them to extreme temperatures.
- Service: Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure the safety of the power tool is maintained.
7. Troubleshooting
If you encounter issues with your Bosch GOP18V-28N, consider the following general troubleshooting steps:
- Tool not starting: Ensure the battery is fully charged and properly inserted. Check the on/off switch position.
- Reduced performance: Check if the blade is dull or damaged and replace if necessary. Ensure the correct speed setting is selected for the material.
- Excessive vibration: Verify that the blade is securely attached and not damaged.
For persistent issues, contact Bosch customer support or an authorized service center.
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | GOP18V-28N |
| Voltage | 18 Volts |
| Power Source | Battery Powered |
| Oscillating Arc | 2.8° |
| Oscillations Per Minute (OPM) | 8,000 - 20,000 |
| Item Weight | 1.6 ounces (tool only) |
| Product Dimensions (L x W x H) | 12.8 x 3 x 3.2 inches |
| Material | Plastic Composite and Aluminum |
| Included Components | (1) GOP18V-28 18V EC Brushless StarlockPlus® Oscillating Multi-Tool (Bare Tool) |
9. Warranty and Support
Bosch 18V cordless power tools are covered by a five-year limited warranty. For detailed information, please visit the Bosch power tools website or call 1-877-BOSCH99.
Additional protection plans are available for purchase:
- 3-Year Protection Plan
- 4-Year Protection Plan
- Complete Protect: One plan covers all eligible past and future purchases (monthly billing)

Image 6: Information regarding the Bosch 18V 5-Year Limited Warranty.
For further assistance or to register your tool, please visit boschtools.com or call 1-877-BOSCH99.





