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General| Input power | 800 W |
|---|---|
| Power source | AC |
| AC input voltage | 230 V |
| Impact rate | 4000 bpm |
| Rated speed (max) | 900 RPM |
| Rated speed (min) | 0 RPM |
| Impact energy (max) | 3.1 J |
| Vibration level (chiseling) | 9.7 m/s² |
| Drilling diameter in wood (max) | 30 mm |
| Drilling diameter in steel (max) | 13 mm |
| Vibration level (hammer drilling) | 14.5 m/s² |
| Drilling diameter in concrete (max) | 28 mm |
| Optimum drilling diameter (concrete) | 12 - 18 mm |
| Vibration level uncertainty (hammer drilling) | 1.5 m/s² |
| Reverse | Yes |
| Chuck type | SDS Plus |
| Weight (including battery) | 3500 g |
Weight and Dimensions| Depth | 85 mm |
|---|---|
| Width | 355 mm |
| Height | 233 mm |
| Package depth | 480 mm |
| Package width | 360 mm |
| Package height | 130 mm |
General safety advice applicable to all power tools, emphasizing reading instructions and saving them.
Guidelines for maintaining a safe and clean work environment to prevent accidents.
Precautions related to electrical connections and avoiding electric shock.
Advice on maintaining personal alertness, using protective equipment, and preventing unintentional starting.
Guidance on operating, maintaining, and storing the power tool to ensure proper use and longevity.
Instructions for professional servicing of the power tool using identical replacement parts.
Essential safety measures for operating the hammer tool, including protective gear and secure handling.
Specifies the intended applications for the hammer drill, including material types and operations.
Lists and describes the main features and components of the power tool as shown in the illustrations.
Instructions on how to attach and adjust the auxiliary handle for secure operation.
Guidance on changing the position of the auxiliary handle for optimal user posture.
Procedures for mounting, inserting, and removing the key type drill chuck for GBH 3-28 DRE.
Procedures for removing and inserting the quick change chuck for GBH 3-28 DFR.
Instructions for inserting and removing SDS-plus drilling tools and general precautions.
Guidance on inserting and removing tools without SDS-plus for the GBH 3-28 DRE model.
Guidance on inserting and removing tools without SDS-plus for the GBH 3-28 DFR model.
Steps for attaching the dust extraction accessory to the auxiliary handle.
Procedure for setting the drilling depth when using the dust extraction attachment.
Important checks before starting operation, including mains voltage correspondence.
Instructions on how to select the operating mode using the mode selector switch.
Guidance on using the rotational direction switch to change the tool's rotation direction.
How to start and stop the power tool using the On/Off switch.
Adjusting the speed and impact rate by varying the pressure on the On/Off switch.
Explanation of the safety clutch function and recommended handling during jams.
Tips for optimizing performance and safety, including chisel position and rotation direction.
General instructions for cleaning the tool, ventilation slots, and tool holder.
