Makita HR4003C Rotary Hammer

Features:

• Powerful Performance:

  • Motor: 1,100 W
  • Impact Energy:
    • EPTA-Procedure 05/2009: 8.3 J
    • Experimental Conditions: 11.4 J
  • Capacities:
    • Concrete (with TCT Bit): 40 mm (1-9/16″)
    • Concrete (with Core Bit): 105 mm (4-1/8″)

• User Control and Comfort:

  • Lock-on/Trigger Activation: In "Chipping Only" mode with push button start/stop control.
  • Constant Speed Control: Automatically applies additional power to maintain speed under load.
  • Soft Start: Suppresses start-up reaction for more control and better accuracy.
  • Variable Speed Control Dial: Enables the user to match the speed to the application for greater versatility.
  • Torque Limiting Clutch: Prevents gear damage by automatically disengaging gears if the bit binds.
  • Depth Gauge: Ensures consistent drilling depth for precision work.
  • Double Insulated: Provides additional safety for the user.

• Operational Efficiency:

  • Sequential Impact Timing: Delivers timed hammering during rotation to minimize overlapping bit impacts for up to 50% faster drilling.
  • LED Service Light: Notifies the user approximately 8 hours before the brushes need to be replaced.
  • LED Power Light: Indicates switch failure or cord damage.

Technical Specifications:

• Continuous Rating Input: 1,100 W
• Blows Per Minute (BPM): 1,450 – 2,900
• No Load Speed (RPM): 250 – 500
• Sound Pressure Level: 92 dB(A)
• Sound Power Level: 103 dB(A)
• Noise K Factor: 3 dB(A)
• Vibration Levels:
  • Chiselling Function with Side Handle: 9.0 m/s²
  • Chiselling Function with Side Grip: 9.0 m/s²
  • Hammer Drilling into Concrete: 10.0 m/s²
• Vibration K Factor: 1.5 m/s²

Dimensions and Weight:

• Dimensions (L x W x H): 479x106x263 mm (18-11/16″x4-3/16″x10-3/8″)
• Net Weight: 6.2 – 6.4 kg (13.7 – 14.1 lbs.)
• Power Supply Cord: 5.0 m (16.4 ft)

Summary:

The Makita 40mm Combination Hammer is designed for demanding applications, delivering high impact energy and versatile functionality. With advanced features like constant speed control, soft start, and LED indicators, it ensures efficiency and durability. Its ergonomic design, including a soft grip and built-in torque limiting clutch, provides enhanced user comfort and safety.

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