Tools / Power Tools
User Manual for Bosch GBH 18V-28 C / GBH 18V-28 CF Cordless Rotary Hammer
Quick guide for the Bosch GBH 18V-28 C and GBH 18V-28 CF cordless rotary hammers. Includes setup, operation, maintenance, and safety instructions.
Quick answers from the manual
Quick answer
- This manual provides instructions for operating the Bosch GBH 18V-28 C and GBH 18V-28 CF cordless rotary hammers, including safety guidelines, technical specifications, and maintenance procedures. p. 19, 21
Key actions
- Inserting and removing the battery p. 24
- Changing the drill chuck (GBH 18V-28 CF) p. 25
- Setting the operating mode p. 26
- Adjusting the drilling depth p. 28
First start
- Insert the battery, select the operating mode, and press the on/off switch. p. 24, 26
Problems and fixes
Battery charge indicator (Yellow/Red)
Replace or charge the battery.
p. 27
Power tool status indicator (Yellow/Red)
Allow the power tool to cool down, or replace/charge the battery.
p. 27
Rapid shut-off triggered (Flashing red)
Turn the power tool off and on again.
p. 27Error codes
| Code | Meaning | Action | Pages |
|---|---|---|---|
| Flashing red | Rapid shut-off is triggered | Turn the power tool off and on again. | p. 27 |
Maintenance and reset
- Clean the tool holder after each use and replace a damaged dust protection cap immediately. p. 29
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Rated voltage | 18 V | Operating voltage | p. 22 |
| Impact energy | 3.3 J | Impact energy per stroke according to EPTA-Procedure 05:2016 | p. 22 |
| Max drilling diameter (Concrete) | 28 mm | Maximum drilling capacity in concrete | p. 22 |
| Weight (without battery) | 3.3 kg (C) / 3.4 kg (CF) | Weight of the tool without battery | p. 22 |
Where to find it in the PDF
- Safety instructions p. 19, 20, 21
- Product description p. 21, 22
- Technical data p. 22, 23
- Operation p. 26, 27, 28
- Maintenance and Service p. 29
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 GBH 18V-28 C and GBH 18V-28 CF cordless rotary hammers. Always read the full safety instructions before use.
Product Description
The rotary hammer is designed for hammer drilling in concrete, brick, and stone, as well as light chiseling work. It is also suitable for drilling without impact in wood, metal, ceramic, and plastic. Power tools with electronic control and right/left rotation are also suitable for screwdriving.
Assembly
Auxiliary Handle: Always use the auxiliary handle (20) and ensure it is securely tightened. You can swivel the handle to any angle for a safe work posture.
Changing the Chuck: For tools without SDS-plus, use a suitable keyed or keyless chuck. Follow the specific instructions for your model (GBH 18V-28 C or GBH 18V-28 CF).
Operation
Operating Mode: Use the impact/mode selector switch (17) to select the desired mode (hammer drilling, drilling, or chiseling). Only change the mode when the tool is switched off.
Rotational Direction: Use the rotational direction switch (10) to change the direction. Always set to clockwise for hammer drilling and chiseling.
Speed Control: Adjust the speed/impact rate by varying the pressure on the on/off switch (12).
Maintenance
Keep the tool and ventilation slots clean. Replace a damaged dust protection cap (4) immediately. Clean the tool holder (3) after each use.
Manufacturer information
Bosch
Practical help
Common problems
Tool does not start
Check battery charge status and ensure the battery is properly inserted.
Rapid shut-off (KickBack Control) triggered
Release the on/off switch and press it again to restart.
Dust extraction not working
Ensure the dust extraction attachment (GDE 18V-16) is correctly mounted and not blocked.
Before use
- Ensure battery is fully charged.
- Check that the auxiliary handle is securely tightened.
- Verify the correct drill bit or chisel is inserted.
- Ensure the dust protection cap is not damaged.
- Check the rotational direction switch.
Specs in practice
- Impact energy
- 3.3 J, determines the force of the hammer blow.
- Max. drilling diameter (concrete)
- 28 mm, the maximum hole size in concrete.
- Rated voltage
- 18 V, the battery voltage required.
Images and diagrams
- Page 3: Overview of components (1-21).
- Page 4: Changing the chuck (A, B, C, D) and tool changing (E, F).
- Page 6: User Interface (L) and battery status.
Model compatibility
- Compatible with GBA 18V and ProCORE18V batteries.
- Compatible with GDE 18V-16 dust extraction attachment.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.