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Hitachi

Hitachi Koki Co.,Ltd.

DH40MEY

40mm (1-9/16") Rotary Hammer

Highest torque in this class 36Nm, Shortest body length in this class 170mm
Rotary HammerFDH40MEY
* As of November 2014. Among rotary hammers made by leading power tool manufacturers, surveyed by Hitachi Koki.
  • AC Brushless Motor
  • User Vibration Protection
  • Alminium Housing Body
  • SDS-max Shank
  • iF product design award
Industry First/AC Brushless Motor
* As of November 2014. Among rotary hammers made by leading power tool manufacturers, surveyed by Hitachi Koki.
  • Maintenance-free
The product life cycle is significantly extended by eliminating troubles with armature burnout, layer short and commutator wear. Besides, no carbon brush replacement is required. Industry First/AC Brushless Motor
  • Fastest drilling speed in its class * even at voltage drops
Efficient brushless motor offers higher drilling performance even with an extension cord.
* As of November 2014. Among 40mm class rotary hammers made by leading power tool manufacturers, surveyed by Hitachi Koki.
  • Compatible with engine generators
Designed to be powered by engine generators as well, thanks to Hitachi's original compact and high efficiency inverter circuit.
Highest Demolition Performance / Fastest Drilling Speed in its class
  • Highest *1 Demolition Performance and Fastest *1 Drilling Speed in its class
Acheived by high efficiency brushless motor and optimised hammering mechanism. Highest Demolition Performance / Fastest Drilling Speed in its class
*1
As of November 2014. Among 40mm class rotary hammers made by leading power tool manufacturers, surveyed by Hitachi Koki.
*2
A comparison of the model DH40MEY and the previous model DH40MRY. The results may vary depending on operating conditions.
*3
A comparison of the model DH40MEY and the previous model DH40MRY. Mean value for drilling into concrete with drill bits between 16mm and 40mm diameters. The results may vary depending on operating conditions.
Reduced vibration and improved operating efficiency
User Vibration Protection * A comparison of the model DH40MEY and the previous model DH40MRY. The results may vary depending on operating conditions.
  • Hitachi's original, spring-type dynamic vibration absorber
Hitachi's original, spring-type dynamic vibration absorver with a weight and two springs moves in the opposite direction to the vibration direction of the main body. This results in reduced vibration and improved operating efficiency. Spring-type dynamic vibration absorber
  • Vibration-absorbing handle
Vibration-absorbing mechanism with the transatory unit and the Neidhardt spring provides high vibration-absorbing effect.
High durability
  • The internal double-insulation construction with a very sturdy aluminium die-cast body and a plastic internal stator holder, is incorporated.
Almimium Housing Body This makes the housing more rigid, significantly enhancing durability of the motor unit.
Improved handling
  • Push-button, constant speed control with variable speed
Equipped with a built-in electronic control circuit that can adjust the impact rate according to applications. Four-step impact rates can be selected by the rotation speed selector switch.
Switch-type, constant peed control with variable speed

Display Lamp
No Load Speed 250 / min 330 / min 410 / min 500 / min
Full Load Impact Rate 1,430 / min 1,900 / min 2,370 / min 2,850 / min

  • One push action for quick bit mounting
One push action for quick bit mounting A bit can be mounted by simply inserting it into the tool holder.
  • Large change lever
Large change lever Up-sized mode change lever is located on the top of the tool body for easier operation.
  • Large trigger switch
Large trigger switch Up-sized, easy-to-grip trigger switch for more control.

Specifications

Capacity Drill bit: 40mm (1-9/16")
Core bit: 105mm (4-1/8")
Power Input 1,150W
Bit Shank SDS max
No Load Speed 250 - 500 / min
Full Load Impact Rate 1,430 - 2,850 / min
Overall Length 477mm (18-4/5")
Weight (including side-handle) 7.5kg (16.5 lbs.)
Vibration Total Values
(triax vector sum)*
Hammer drilling into concrete Vibration emission value : ah, HD = 8.0m/s2
Uncertainty K = 1.5 m/s2
Equivalent chiselling value Vibration emission value : ah, CHeq = 7.3m/s2
Uncertainty K = 1.5m/s2
Standard Accessories Side Handle, Stopper, Rotary Hammer Grease A, Carrying Case
*The tri-axial vibration values were measured according to EN60745-2-6.


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