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Bosch Rotary Hammer with SDS-plus (GBH 3-28 DFR) Side View

Bosch Rotary Hammer with SDS-plus (GBH 3-28 DFR)


The GBH 3-28 DFR provides top performance with 20% less vibration

  • High drilling rate and 20% higher chiselling power than other rotary hammers in its class
  • 20% less vibration compared to other hammers in its class for more comfortable working due to Bosch Vibration Control system
  • Quick change chuck for fast changes between drilling with impact in concrete and drilling without impact in wood and metal 
  • Technical Data

    Rated input power 800 W
    Impact energy 3.1 J
    Impact rate at rated speed 0 - 4,000 bpm
    Rated speed 0 - 900 rpm
    Weight 3.6 kg
    Tool dimensions (width) 85 mm
    Tool dimensions (length) 355 mm
    Tool dimensions (height) 233 mm
    Tool holder SDS plus
    Drilling range  
    Drilling dia. concrete, hammer drill bits 4 - 28 mm
    Opt. appl. range concrete, hammer drill bits 12 - 18 mm
    Drilling diameter in concrete with core cutters 68 mm
    Max. drillling diameter masonry, core cutters 82 mm
    Max. drilling diameter in metal 13 mm
    Max. drilling diameter in wood 30 mm
    Total vibration values (hammer drilling in concrete)  
    Vibration emission value ah 13 m/s^2
    Uncertainty K 2 m/s^2
    Total vibration values (chiselling)  
    Vibration emission value ah 9.5 m/s^2
    Uncertainty K 1.5 m/s^2


  • Benefits & Functions

    • Bosch Heavy Duty - power, performance and robustness redefined
    • Vibration control increases comfortability while working due to low vibration by adding rubber mounting/foam padding to the handles of the tool
    • SDS plus for optimal power transmission for small hammers
    • Metal chuck sizes: 1.0 - 13.0 mm
    • Forward/reverse rotation for inserting and removing screws