Tools / Drills
Bosch GSB 12V-15 Professional Cordless Combi Drill User Manual
Quick guide for the Bosch GSB 12V-15 Professional cordless combi drill. Includes setup, operation, safety instructions, and maintenance.
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential information for the safe and efficient operation of the Bosch GSB 12V-15 Professional cordless combi drill. Always read the full safety instructions before use.
Product Description
The GSB 12V-15 is a cordless combi drill designed for drilling in wood, metal, ceramic, and plastic, as well as impact drilling in brick, masonry, and stone. Key components include:
- Tool holder
- Keyless chuck
- Torque presetting ring
- Operating mode presetting ring
- Gear selector switch
- Rotational direction switch
- Battery release button
- Battery
- Battery charge indicator
- On/off switch
- Worklight (LED)
Assembly
Charging the battery: Use only the chargers listed in the technical data. The battery is supplied partially charged. Fully charge it before first use.
Removing the battery: Press the release button and pull the battery downwards out of the tool. Do not use force.
Changing the tool: Open the keyless chuck by turning it in the direction of rotation until the tool can be inserted. Insert the tool and firmly tighten the chuck by hand.
Operation
Starting operation: Set the rotational direction switch to the middle position to prevent accidental starting. Insert the charged battery into the handle until it engages.
Setting the rotational direction: Use the rotational direction switch to change the direction. Right rotation for drilling and driving screws; left rotation for loosening screws and nuts.
Setting the operating mode: Use the operating mode presetting ring to select between drilling, screwdriving, or impact drilling.
Pre-selecting the torque: The torque presetting ring allows you to pre-select the required torque in 20 stages.
Mechanical gear selection: Use the gear selector switch only when the tool is at a standstill. Gear I is for low speed (large drilling diameter/screwdriving), and Gear II is for high speed (small drilling diameter).
Maintenance and Service
Remove the battery before any work on the tool (e.g., maintenance, tool change). Keep the tool and ventilation slots clean for safe operation. For repairs or spare parts, contact your local Bosch service center.
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start
Check battery charge status and ensure it is properly inserted.
Tool stops during operation
Battery may be discharged or tool is overloaded. Let it cool down or charge the battery.
Drill bit slips in chuck
Ensure the chuck is tightened firmly by hand.
Before use
- Ensure the battery is fully charged.
- Check that the correct drill bit or screwdriver bit is inserted.
- Set the correct rotational direction.
- Select the appropriate operating mode (drilling, screwdriving, or impact drilling).
- Select the correct gear (I or II).
Specs in practice
- Rated voltage
- 12V DC power supply.
- No-load speed
- 0-380 rpm (1st gear) / 0-1300 rpm (2nd gear).
- Max. drilling diameter
- 10mm in masonry/steel, 19mm in wood.
Images and diagrams
- (1) Tool holder
- (2) Keyless chuck
- (3) Torque presetting ring
- (4) Operating mode presetting ring
- (5) Gear selector switch
Model compatibility
- Compatible with Bosch 12V Li-ion batteries (GBA 12V...).
- Use only recommended Bosch chargers (GAL 12..., GAX 18...).
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.