Dewalt FlexVolt 1-7/8” SDS Max Rotary Hammer

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Dewalt FlexVolt SDS Max Brushless 1-7/8” Combination Hammer DCH733

Dewalt FlexVolt 1-7/8” SDS Max Hammer Drill

Manufacturer: Dewalt
Model number: DCH733
Price: 999 kit / 699 bare tool
Power source: Cordless
Motor size: Brushless
Weight: 20 lbs
Dewalt FlexVolt 1-7/8” SDS Max Rotary Hammer looks just like its older corded brother, it even has the same internal mechanism, but it’s NOT corded.

Dewalt FlexVolt 1-7/8” SDS Max Hammer Drill Features

This cordless hammer can operates in 2 modes hammer / rotary drilling  and hammer only [chipping]. It has two safety features that I know I will greatly appreciate, they are:

  1. E-Clutch System
  2. SHOCKS Active Vibration Control


E-Clutch System [Overload clutch]

The E-Clutch system senses the motion of the tool and shuts it down if necessary. Its  anti-rotational technology protects the user in bind-up / stall situations. When the tool sense a stall or bind situation, it adjusts torque accordingly.  A red LED indicator illuminates when the E-clutch system is engaged.


SHOCKS Active Vibration Control

The SHOCKS technology is basically Active Vibration Control which reduces vibration felt by the user at the handles. The handle is decoupled from the tool which ends up in reduced vibration felt by the user. This floating rear anti-vibration handle does a nice job at reducing vibration.

We used the DCH733 to install a car jack in a client’s garage. We found it to be a fast drilling, low vibration tool in older, hard concrete.

The tool achieves 13.3 Joules [According to EPTA-Procedure 05/2009]and 350 RPM.


Electronic Speed and Impact Control

TheDewalt FlexVolt 1-7/8” SDS Max Rotary Hammer has constant speed electronics allowing the tool to maintain speed under load.

The electronic speed and impact control allow the use of smaller bits without the risk of breakage. It allows hammer drilling into light and brittle materials without shattering giving the user more precise control through a speed dial.

E-Clutch and Service Indicator LED Light

This rotary hammer has two LEDs that indicate the E-Clutch function and a service indicator. The light functions are:

  • RED – E-Clutch is engaged
  • Yellow [Flashing] The tool runs for 150 hrs then service light comes on indicating that the mechanism needs a service to be performed in the next 10 hrs. of operation/trigger time.
  • Yellow [Solid] After that 10hrs the light goes solid and indicates that you have exceeded the service interval and may damage the tool.

Chisel Index Position

The chisel can be indexed and locked into 24 different positions.  This feature, while not a new one, certainly that makes the tool ergonomically friendlier to use.

Using the Dewalt FlexVolt 1-7/8” SDS Max Hammer Drill

We used the Flexvolt rotary hammer both in the horizontal and vertical drilling positions. At 20-pounds, it’s a manageable tool to do both, and certainly powerful enough.

It drilled effortlessly into a poured concrete wall to install gym equipment and later we used it to install and bolt down a vehicle jack system on a concrete floor.

The drill was easy to set up and use, and intuitive. It’s perfect for use in concrete demo,  drilling, chipping, breaching cinderblock, rebar doweling, and trenching.

Though this new DEWALT tool is bigger and heavier than my 1-3/4” DEWALT rotary hammer, DEWALT has been able to keep the weight down of the tool and increase the impact energy 20% to 13.3J’s.

With increases in power comes weight!



  • Impact Energy: 13.3 joules/8.9 foot-pounds
  • No Load Speed: 177-355 RPM
  • Drilling Range: 3/4″ – 1-3/4″
  • Vibration Rating: 9.0 M/S²
  • Length: 23.5″
  • Height: 11.2″
  • Weight: 20 pounds
  • Bit: SDS-MAX
  • Service light to alert you to maintenance needs
  • Price:$699 bare, $999 kit
  • Warranty: 3 years


The Dewalt FlexVolt 1-7/8” SDS Max Rotary Hammer sells as a kit DCH733X2 with (2) 9.0 Ah batteries for $999 MSRP, and as a bare tool DCH733B for $699 MSRP


The Dewalt FlexVolt 1-7/8” SDS Max Rotary Hammer is an excellent drilling and chipping tool for concrete work, commercial tile demo, mechanical, electrical, and plumbing contractors.

Dewalt FlexVolt 1-7/8” SDS Max Rotary Hammer Video Review



About the author

Rob Robillard

Robert Robillard is a remodeler, general contractor, and principal of a carpentry and renovation business located in Concord, Massachusetts, and serves as the Editor of Tool Box Buzz and founding editor of A Concord Carpenter . Rob is in charge of our Tool and Product Review - Tool and Product Review - Video Channel, , where we post all of our tool reviews and video tutorials. Rob enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the remodeling industry. The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob Robillard

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