Tools / Drills
Bosch GSB 120-LI / GSR 120-LI Cordless Drill Driver User Guide
Quick guide for the Bosch GSB 120-LI and GSR 120-LI cordless drill drivers, covering battery installation, tool changing, operating modes, and safety instructions.
Table of contents
Manual images
Jump to the sectionQuick guide from the manual
This document provides essential operating instructions for the Bosch GSB 120-LI and GSR 120-LI cordless drill drivers. Key actions include battery installation, tool changing, and selecting the correct operating mode. Always ensure the rotational direction switch is in the center position when not in use to prevent accidental startup.
Device Description
The tools feature a keyless chuck, torque presetting ring, gear selector, and rotational direction switch. The GSB 120-LI model includes an additional mode selector for impact drilling in brick, concrete, and stone.
Assembly
Always remove the battery before performing any maintenance, changing tools, or transporting the device. To remove the battery, press the release buttons and pull the battery downwards.
Operation
Inserting the battery: Insert the charged battery into the handle until it clicks into place. Setting rotational direction: Use the switch to select right rotation (drilling/screwdriving) or left rotation (loosening screws/nuts). Operating modes: Use the mode selector (GSB) or torque ring (GSR) to switch between drilling, screwdriving, and impact drilling (GSB only). Torque selection: Use the torque ring to preselect the required torque in 20 stages.
Maintenance and Cleaning
Keep the tool and ventilation slots clean for safe operation. For repairs or spare parts, contact Bosch customer service or visit www.bosch-pt.com.
Official resources from the manual
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start
Check if the battery is charged and correctly inserted. Ensure the rotational direction switch is not in the center position.
Gear selector cannot be pushed to the stop
Slightly rotate the tool holder with the inserted tool to align the gears.
Battery does not charge
Ensure you are using a charger recommended in the technical data section.
Before use
- Ensure the battery is fully charged.
- Check that the correct tool bit is inserted and secured in the chuck.
- Set the rotational direction switch to the desired direction.
- Select the appropriate gear (I or II) for the task.
- Set the operating mode (drilling, screwdriving, or impact drilling).
Specs in practice
- Rated voltage
- 12V, indicating the battery system compatibility.
- No-load speed (1st gear)
- 0-400 min-1, suitable for screwdriving or large diameter drilling.
- No-load speed (2nd gear)
- 0-1500 min-1, suitable for small diameter drilling.
Images and diagrams
- Figure A: Battery removal process.
- Figure B: Tool changing in the keyless chuck.
- Figure C: Setting the rotational direction.
Model compatibility
- Use only GBA 12V series batteries.
- Use only GAL 12 or GAX 18 series chargers.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.