Bosch 1-9/16 in. Spline Rotary Hammer

Bosch is hitting the rotary hammer market hard with the RH540M Combination Hammer and RH540S Spline Combination Hammer. Having fallen behind the competition a bit, these new tools come back in a big way, boasting best in class performance. Delivering 6.1 foot pounds of impact energy, the 540’s are up to 20% stronger than the competition. The two are virtually identical with the exception of the bit system. The “M” model will feature the SDS-Max bit system, while the “S” model will accommodate accessories with a spline or 3/4″ round hex shank.

Bosch 1-9/16 in. Spline Rotary Hammer Features

The highlights of what makes the RH540 series Bosch 1-9/16 in. spline rotary hammers worth considering include the combination dual selector knob to switch between rotary and hammer only modes, the Vari-Lock positioning system that allows a chisel to be set in any of 12 positions for optimum use, and service modules that make it easy for technicians to quickly change out brushes and cords. The rotary hammers also are engineered with a 360 degree auxiliary handle,  an integral clutch that disengages the transmission in binds, and CSA listed, OSHA compliant grounded design.

Bosch 1-9/16″ Rotary Hammer Models RH540M/S Specifications

  • Amperage: 12
  • Voltage: 120
  • Impact Energy according to EPTA: 6.1 ft lbs
  • No Load BPM: 1500 – 2900
  • No Load RPM: 170 – 340
  • Weight: 15.2 lbs (M), 15 lbs (S)
  • Warranty: 1 year limited

The kit will include the RH540M or RH540S, Auxiliary Handle, and Carrying Case when it comes out in February and carries an MSRP of $419. For more information, visit

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