Dewalt 20V Atomic DCD709 Hammer Drill Vs Dewalt 20V Max XR DCD805 Hammer Drill

Dewalt DCD709 Angle 5

Dewalt DCD709

Quick take

The Dewalt 20V Max XR DCD805 Hammer Drill and Dewalt 20V Atomic DCD709 are excellent drills for different users. The DCD805 is designed for flagship performance in demanding tasks and delivered on this promise in our testing, with incredibly fast drilling and driving speed under load. It also includes a multi-position work light with several setting options. However, the DCD805 is bulky and heavy, which is where the DCD709 picks up the slack. The DCD709 is powerful for a compact drill but can’t match the speed and torque of any flagship drill. It is also short from tip to tail and light.

Brand Dewalt
Platform 20V Atomic
Motor Brushless
Speeds 2
Torque in-lbs Not advertised
BPM 28,050.0
Clutch settings 15
Chuck size 1/2"
Same as DCD709B
Brand Dewalt
Platform 20V Max XR
Motor Brushless
Speeds 2
Torque in-lbs Not advertised
BPM 34,000.0
Clutch settings 15
Chuck size 1/2"
Same as DCD805B

Editorial opinion

Rating

4.00 / 5 stars

Methodology used: Heavy duty

Pros

  • Compact and lightweight
  • Brushless motor
  • Includes a hammer drill functionality
  • Solid warranty

Cons

  • Plastic chuck sleeve isn’t as durable as metal
  • Moderately loud under load

Rating

4.25 / 5 stars

Methodology used: Heavy duty

Pros

  • Impressive drilling and driving speed
  • Solid build quality
  • Versatile and configurable worklight
  • Includes a hammer drill mode
  • Brushless motor
  • Long warranty

Cons

  • Heavy and bulky
  • Loud noise output
  • No auxiliary arm included
  • No kickback control technology

Global rankings

18 models tested

TestResultRank
Drilling speed (sec.)15.98
Driving speed (sec.)12.19
Torque (in-lbs)Not advertisedNot ranked
RPM1,623.013
Bare weight (lbs)2.467
Drilling Noise (dBA)90.313
TestResultRank
Drilling speed (sec.)10.12
Driving speed (sec.)7.12
Torque (in-lbs)Not advertisedNot ranked
RPM2,038.04
Bare weight (lbs)3.0013
Drilling Noise (dBA)96.117

Recommended configuration

DCD709BWP034C

Includes (1) Powerstack 1.7Ah battery

Lab results

Drilling speed

Drilling speed total time (drill mode, sec.): 15.9
Drilling speed average time (drill mode, sec.): 3.2
Drilling speed total time (hammer mode, sec.): 15.0
Drilling speed average time (hammer mode, sec.): 3.0
Hammer mode speed improvement: 5.7%

Dewalt did a solid job packing sufficient performance into a compact footprint. The DCD709 turned in good results in our drilling speed test, which is designed to understand each drill’s limits.

Critically, it sustained high enough RPMs under load to easily clear chips from the hole and avoid bogging down. However, it doesn’t have enough muscle to be considered a professional-grade hammer drill. Upgrade to the Dewalt 20V Max XR DCD805 Hammer Drill for flagship drilling performance.

We were underwhelmed by the hammer drill functionality in our testing. The hammer drill improved drilling speeds by only 5.7%. Other more effective hammer drills improve speed by upwards of 20.0%.

Compare drilling speed test results

Drilling speed

Drilling speed total time (drill mode, sec.): 10.1
Drilling speed average time (drill mode, sec.): 2.0
Drilling speed total time (hammer mode, sec.): 7.2
Drilling speed average time (hammer mode, sec.): 1.4
Hammer mode speed improvement: 28.7%

The DCD805 is an impressively fast drill that sustains high RPMs under demanding drilling loads. The DCD805 completed our drilling speed test blazingly fast in 10.1 seconds in the standard drill mode.

The results are even rosier in the hammer drill mode, which brought the time down to 7.2 seconds to bore five 1/2-inch holes. That’s a speed improvement of 28.7%, which is high compared to other hammer drills in our test fleet.

We further tested drilling wider and narrower gauge holes using a mix of forstner and spade bits. The DCD805 finished most of these tests without needing to downshift a gear for additional torque, which is rare for models we’ve tested.

While the power output is impressive and fun to experience, the DCD805 is arguably overpowered for most homeowners, who don’t push tools to their limits and may be more prone to wrist injuries when not using it appropriately. Consider the Dewalt 20V Atomic DCD799 Hammer Drill if you want a more user-friendly drill for around the home.

Compare drilling speed test results

Driving speed

GRK total driving time forward (sec.): 12.1
GRK average driving time forward (sec.): 2.4
GRK total driving time reverse (sec.): 10.4
GRK average driving time reverse (sec.): 2.1

The DCD709 was reasonably fast in our driving speed test. Again, it doesn’t offer flagship speeds that are needed on the job site. Still, it finished driving 5 1/8-inch GRK RSS fasteners without bogging down or needing to drop a gear to the low setting for improved torque output.

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Driving speed

GRK total driving time forward (sec.): 7.1
GRK average driving time forward (sec.): 1.4
GRK total driving time reverse (sec.): 6.1
GRK average driving time reverse (sec.): 1.2

Unsurprisingly, the DCD805 is also incredibly fast driving big fasteners. It delivered one of the swiftest results in our Summer 2023 drill test fleet, finishing five GRK RSS 5 1/8-inch fasteners in only 7.1 seconds, not counting down time between each screw.

We further tested the DCD805 by driving several longer and wider gauge lag bolts into stacked 2x6s. We didn’t run into a scenario where we needed to drop to the low setting for added torque to finish the job, rare for most drills.

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RPM

Dewalt DCD709 RPM Chart

Max RPM speed 2: 1,623.0
Max RPM speed 1: 430.0

The DCD709’s RPM output doesn’t match the speed offered with more powerful drills, partly explaining its performance in our drilling and driving speed tests.

We also measured the RPM output with a contact tachometer in the low setting to understand the speed capabilities when torque matters more than RPMs. In the low setting, the DCD709 is slower than many models in our test fleet. In practice, expect that the DCD709 will have enough torque to finish demanding drilling jobs, but it will do so more slowly.

Compare drill RPM test results

RPM

Dewalt DCD805 RPM Chart

Max RPM speed 2: 2,038.0
Max RPM speed 1: 649.0

The DCD805’s drilling and driving speed performance directly relates to the high RPM output. In all the action modes and transmission settings, we tested the RPM performance with a contact tachometer in a no-load scenario.

While no-load RPM output doesn’t tell the whole story of how a drill performs under load, our speed testing results confirm that the DCD805 has the muscle to sustain RPMs at a higher rate than many hammer drills under load.

Compare drill RPM test results

Torque

Advertised max torque (in-lbs): Not advertised
Advertised max torque (ft-lbs): Not advertised

Dewalt no longer advertises the torque of its drills and we currently don’t test torque on a torque meter in-house, like we do for impact drivers.

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Torque

Advertised max torque (in-lbs): Not advertised
Advertised max torque (ft-lbs): Not advertised

Dewalt no longer advertises the torque of its drills and we currently don’t test torque on a torque meter in-house, like we do for impact drivers.

Compare drill torque

Chuck

Dewalt DCD709 Chuck Closeup

Chuck size: 1/2″
Chuck sleeve material: Plastic

While the chuck sleeve is made from plastic and metal is better for durability, the DCD709’s ratcheting chuck works well. The three jaws lock onto drill bits and didn’t loosen with usage during our tests.

Chuck

Dewalt DCD805 Chuck Closeup

Chuck size: 1/2″
Chuck sleeve material: Knurled metal

The DCD805 is a flagship hammer drill, so we expected it to have a premium chuck. It did not disappoint. The all-metal chuck locked onto bits and didn’t inadvertently loosen at any point throughout our lab tests. The metal knurling on the chuck sleeve also provides the right amount of friction when ratcheting the chuck by hand, which is helpful for quickly and confidently inserting drill bits.

Motor & BPM

Dewalt DCD709 Drill Modes

Motor type: Brushless
Action modes: Drill, hammer
Advertised blows per min. (speed 2): 28,050.0
Advertised blows per min. (speed 1): Not advertised
Variable speed trigger: Yes
Kickback control technology: No
Trigger draw length (in.): 0.250

The DCD709 includes a brushless motor, improving its durability and efficiency over dated brushed motors. There are two action modes that disengage the chuck for unfettered torque. The hammer drilling mode adds in 28,050.0 blows per minute (BPM), which is needed to efficiently drill masonry and thick lumber.

However, the hammering functionality wasn’t effective at improving speeds, as our drilling speed tests below highlight.

The DCD709 doesn’t include kickback control technology to reduce the risk of injuries when binding up.

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Motor & BPM

Dewalt DCD805 Drill Modes

Motor type: Brushless
Action modes: Drill, hammer
Advertised blows per min. (speed 2): 34,000.0
Advertised blows per min. (speed 1): Not advertised
Variable speed trigger: Yes
Kickback control technology: No
Trigger draw length (in.): 0.250

There are two drilling action modes. The drill mode disengages the chuck for the highest torque output, which is ideal for boring big holes and driving lag bolts and structural fasteners.

The hammer drill mode operates in the same manner but adds in a hammer that impacts at a rate of 34,000.00 blows per minute, which is among the highest in our test fleet. We tested the hammer’s effectiveness in our drilling speed test below to understand the speed improvements offered.

One area for improvement is including some kickback control technology to enhance safety when since an auxiliary arm isn’t included. The Milwaukee M18 Fuel 2904-20 Hammer Drill includes kickback control technology.

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Clutch & speed settings

Dewalt DCD709 Clutch & Speed

Speed settings: 2
Clutch settings: 15

The DCD709 has a familiar two-speed gearbox that runs the drill at the high or low speed in all of the 15 clutch settings and action modes. The highest torque output is achieved in the low setting in drill mode, like all drills.

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Clutch & speed settings

Dewalt DCD805 Clutch & Speed

Speed settings: 2
Clutch settings: 15

There is a standard two-speed gearbox and 15 clutch settings. The high and low settings can be run in any action mode and clutch setting. The DCD805 generates the maximum torque output in either of the drill modes in the low setting.

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Charging time

Dewalt DCD709 Fuel Gauge

Charger tested: Dewalt 20V Max (DCB115)
Charging time 2Ah battery (min.): 59.0
Charging time 4Ah battery (min.): Not tested
Charging time 5Ah battery (min.): 139.0
Charging time per Ah (min.): 28.7
Fuel gauge: On battery

The Dewalt charger that is standard in most kits (model DCB115) isn’t as fast as chargers from other brands. In our tests, it took 59.0 minutes to top off a Max 2Ah battery and 139.0 minutes to charge a Max XR 5Ah battery. Expect that this charger will charge batteries at approximately 28.7 minutes per Ah. Faster chargers charge batteries at 20.0 or fewer minutes per Ah.

Nicely, the DCD112 works with Dewalt’s 12V and 20V platform batteries, conveniently saving space in your shop if you have several tools in the Dewalt ecosystem.

Compare drill charging test results

Charging time

Dewalt DCD805 Fuel Gauge

Charger tested: Dewalt 20V Max (DCB115)
Charging time 2Ah battery (min.): 59.0
Charging time 4Ah battery (min.): Not tested
Charging time 5Ah battery (min.): 139.0
Charging time per Ah (min.): 28.7
Fuel gauge: On battery

One letdown is that the standard charger included in most Dewalt kits (model DCB115) charges batteries slowly compared to other manufacturers. In our testing, the DCB115 charged at a rate of 28.7 minutes per Ah. Several other brands charge at a rate of 20 minutes per Ah or lower.

However, this charger charges 12V and 20V Max platform batteries in one, conveniently saving shelf space in your shop if you have several tools in the Dewalt ecosystem.

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Design & ergonomics

Stands upright (no battery): Yes
Stands upright (w/ battery): Yes
Grip material: Rubber overgrip
Magnetic holder: No
Bit holder: No
Belt hook: Yes
Lanyard compatible: Yes

Design & ergonomics

Stands upright (no battery): Yes
Stands upright (w/ battery): Yes
Grip material: Rubber overgrip
Magnetic holder: No
Bit holder: No
Belt hook: Yes
Lanyard compatible: Yes

Weight

Dewalt DCD709 On Scale

Bare weight (lbs): 2.46
Weight w/ 2Ah battery (lbs): 3.26
Weight w/ 4Ah battery (lbs): Not tested
Weight w/ 5Ah battery (lbs): 3.88

The DCD709 is moderately lightweight for a drill and is exceptionally lightweight compared to other 18V hammer drills in our test fleet. In practice, we encountered fewer situations of muscle fatigue compared to other hammer drills, which are all bulky.

We tested different battery configurations since the working weight can differ meaningfully from the bare tool weight. We recommend combining the DCD709 with Dewalt’s 20V Powerstack 1.7Ah battery, which weighs less, has a smaller footprint, and runs longer than Dewalt’s 20V Max 2Ah battery, a solid alternative for a svelte setup.

Pair the DCD709 with Dewalt’s 20V Max XR 5Ah battery for a longer run time and improved drilling performance if weight is less of a concern.

Compare drill weight test results

Weight

Dewalt DCD805 Angle 7

Bare weight (lbs): 3.00
Weight w/ 2Ah battery (lbs): 3.80
Weight w/ 4Ah battery (lbs): Not tested
Weight w/ 5Ah battery (lbs): 4.42

The DCD805 is a heavy hammer drill, weighing 3.00 lbs in its bare form. You can comfortably hang it from a sturdy work belt by the belt hook. But it’s not light enough to comfortably drop in your jeans pocket for portability.

Many professionals will use this drill with a high Ah-capacity battery. When kitting it out with a 20V Max XR 5Ah battery, the setup weighs 4.42 lbs. We ran into several instances throughout testing where hand fatigue set in, which is expected in this brute force class.

To get sufficient performance in as lightweight a setup as possible, we recommend combining the DCD805 with Dewalt’s 20V Powerstack 1.7Ah battery, which weighs less, has a smaller footprint, and runs longer than Dewalt’s 20V Max 2Ah battery, a solid alternative for a svelte setup.

Compare drill weight test results

Footprint

Dewalt DCD709 Footprint1
Dewalt DCD709 Footprint2

Max height (in.): 9.125
Max width (in.): 3.125
Chuck to back length (in.): 6.875
Base length (in.): 4.500
Base width (in.): 3.125

One defining feature of the DCD709 is its size. Hammer drills almost always feel bulky and cast a big shadow. However, the DCD709 is moderately compact when measured across its dimensions. Notably, the tip-to-tail length is shorter than most competing hammer drills, helping it squeeze well into obstructed spaces.

The Dewalt 20V Atomic DCD799 Hammer Drill is worth considering for equivalent performance in a smaller footprint.

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Footprint

Dewalt DCD805 Footprint1
Dewalt DCD805 Footprint2

Max height (in.): 9.375
Max width (in.): 3.125
Chuck to back length (in.): 7.000
Base length (in.): 4.500
Base width (in.): 3.125

The DCD805 is moderately large when measured in many of its dimensions. To fit the hammering mechanism, the head is wider and longer than its non-hammer drill sister, the Dewalt 20V Max XR DCD800. The increased head size also adds length from tip to tail, though it’s not an overly tall hammer drill.

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Drilling clearance

Min. interior width clearance (in.): 8.500
Min. top edge clearance (in.): 1.375
Min. interior 45-deg. clearance (in.): 6.500

Dewalt’s Atomic tools are designed to be compact and agile, so we entered the drilling clearance tests with high hopes for the DCD709.

It performed exceptionally well for an 18V hammer drill. Notably, the tip-to-tail length is shorter than most competing models in our test fleet, helping it fit into tight corners and between two vertical boards.

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Drilling clearance

Min. interior width clearance (in.): 8.625
Min. top edge clearance (in.): 1.500
Min. interior 45-deg. clearance (in.): 6.875

The DCD805’s moderately large footprint didn’t help it shine in our clearance tests, designed to understand the obstructed spaces and tight areas each drill fits into. Notably, the moderately long tip-to-tail length and bulky head limit the spaces it fits into, including scenarios such as drilling under shelves and fitting into restricted corners.

Compare drilling clearance test results

Auxiliary arm

Auxiliary arm: No

The DCD709 doesn’t include an auxiliary handle to control recoil and enhance stability during heavy-duty drilling tasks. Since the DCD709 is a moderately powerful drill, including an auxiliary arm could improve user safety in demanding jobs.

Check out the Milwaukee M18 Fuel 2904-20 Hammer Drill or Makita 18V LXT XPH14Z Hammer Drill if you want a more powerful drill with an auxiliary arm.

Auxiliary arm

Auxiliary arm: No

The DCD805 is a powerful drill that should include a detachable auxiliary arm in the box to improve user safety when the drill binds up. The Makita 18V LXT XPH14Z Hammer Drill and Milwaukee M18 Fuel 2904-20 Hammer Drill are powerful and include auxiliary arms.

Noise

Dewalt DCD709 Noise Chart

Max no-load noise (dBA): 80.0
Max drilling noise (dBA): 90.3

The DCD709 is loud, just like all hammer drills under load when impacting. It generated 90.3 dBA during our drilling load tests with the hammer mode engaged. This level of noise output rivals the noise that impact drivers generate, and can be harmful with prolonged exposure.

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Noise

Dewalt DCD805

Max no-load noise (dBA): 84.7
Max drilling noise (dBA): 96.1

The DCD805 is one of our test fleet’s loudest drills under load. While the high hammering rate vastly improves drilling speed, it is also incredibly loud, generating 96.1 dBA of noise. This result rivals the noise output of powerful impact drivers, which are also harmful with prolonged exposure.

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Light

Dewalt DCD709 Light Wall
Dewalt DCD709 Light Closeup

Light: Yes
Light location: In base
Light positions: 1
Customizable light settings: None
Light count: Single LED
Light active time (sec.): 20.0

The DCD709’s in-base light sufficiently lights the intended drilling area but isn’t the design we prefer. Light’s located near the trigger that shine directly forward more accurately illuminate the intended work surface. Admittedly, we’re splitting hairs here and the light location isn’t critical. Sufficient is good enough for 95% of the time.

There are no advanced features otherwise. Some of the best Dewalt drills include an in-base light that can be positioned in three settings and has advanced features, such as a spotlight mode and the ability to turn off the light when pulling the trigger.

Light

Dewalt DCD805 Light Wall
Dewalt DCD805 Light Closeup
Dewalt DCD805 Light Customization

Light: Yes
Light location: In base
Light positions: 3
Customizable light settings: Off, On, Spotlight
Light count: Single LED
Light active time (sec.): 20.0

We’re big fans of the DCD805’s worklight. The multi-position light does the essentials well and brightly illuminates the surface directly in front of the nose of the drill, whether using a short or long drill bit.

A switch behind the light can disable the light or enable Spotlight mode, which runs the light for 20 minutes and increases the brightness to an advertised 70 lumens.

Warranty

Tool warranty (years): 3
Battery warranty (years): 3

Dewalt stands behind the durability of its drills with exceptionally long warranties. The DCD709 has a three-year warranty. Dewalt’s 20V Max batteries include a three-year warranty as well.

 

Warranty

Tool warranty (years): 3
Battery warranty (years): 3

Dewalt stands behind the durability of its drills with exceptionally long warranties. The DCD805 has a three-year warranty. Dewalt’s 20V Max batteries include a three-year warranty.

Dewalt also offers free maintenance and replacement of worn parts for one year for the DCD805.

Picture of Nathan Hamilton
Nathan Hamilton
Nathan Hamilton is the founder of DIY Gear Reviews and a recognized expert in the home and DIY space. He has over 200 bylines covering topics such as power tools, hand tools, and woodworking. Nathan is the strategic director for DIY Gear Reviews, deciding everything from the content covered to designing the testing methodologies for lab-tested reviews. He can be emailed at nhamilton@diygearreviews.com.

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