Tools / Power Tools
Bosch GBH 18V-40 C Cordless Rotary Hammer User Manual
Quick guide for the Bosch GBH 18V-40 C Cordless Rotary Hammer, covering assembly, operation, working modes, maintenance, and troubleshooting.
Table of contents
Quick guide from the manual
The Bosch GBH 18V-40 C is a professional cordless rotary hammer designed for hammer drilling in concrete, masonry, and stone, as well as for chiseling work. It features Bluetooth connectivity for data transfer and settings adjustment via a mobile device.
Assembly
Always remove the battery before performing any maintenance, tool changes, or transport. Press the lock-on button to secure the on/off switch during transport or storage.
- Auxiliary Handle: Always use the auxiliary handle (12). Turn the lower grip anticlockwise to swivel it to the desired position, then retighten.
- Tool Change (SDS-max): Clean and lightly grease the insertion end of the tool. Insert the tool into the SDS-max holder while turning until it locks automatically. Pull the tool to check for secure locking. To remove, push the locking sleeve (4) back.
Operation
Ensure the cover (15) for the Bluetooth Low Energy Module GCY 42 is closed during operation to prevent dust ingress.
Setting the Operating Mode
Use the mode selector switch (5) to choose between:
- Hammer Drilling: For drilling in concrete, masonry, and stone.
- Vario-Lock: For adjusting the chisel position.
- Chiseling: For chiseling work.
Working Modes
The user interface (14) allows selection of working modes:
- Auto: Fast, controlled run-up to maximum power.
- Favorite: Individual configuration via smartphone app.
- Soft: Reduced power for processing sensitive materials.
Maintenance and Service
Keep the tool and ventilation slots clean. Replace a damaged dust protection cap (3) immediately. Clean the tool holder (2) after each use.
Troubleshooting
If the status indicator (20) flashes red, the rapid shut-off (KickBack Control) has been triggered. Release the on/off switch (9) and press it again to restart.
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start or stops during operation
Check battery charge level. If the status indicator (20) is yellow, the battery is nearly empty or the tool is too hot. If red, the tool is overheated or the battery is empty.
Rapid shut-off (KickBack Control) triggered
Release the on/off switch (9) and press it again to restart the tool.
Tool does not rotate in hammer drilling mode
Run the tool slowly until the application tool starts rotating.
Before use
- Ensure the battery is fully charged.
- Check that the dust protection cap (3) is not damaged.
- Ensure the auxiliary handle (12) is securely tightened.
- Verify the correct operating mode is selected on the mode selector switch (5).
- Ensure the Bluetooth module cover (15) is closed.
Specs in practice
- Rated voltage
- 18V DC, compatible with Bosch GBA 18V and ProCORE18V batteries.
- Max. drilling diameter (concrete)
- 40 mm for standard bits, 90 mm with hollow core bits.
Model compatibility
- Compatible with Bosch GBA 18V and ProCORE18V battery series.
- Supports Bluetooth Low Energy Module GCY 42 for connectivity features.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.