How to Choose a Hammer Drill
A hammer drill is essential for drilling into masonry, concrete, and brick. This guide explains the key specs, features, and mistakes to avoid so you pick the right model for your projects.
Quick answer
For most DIYers, the DeWalt DCD805B offers the best balance of power, runtime, and value. For heavy-duty work, the Milwaukee 2804-20 delivers superior impact energy. The best budget pick is the Ryobi P1813.
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Research updated June 2026.
What is a hammer drill?
A hammer drill combines rotary drilling with a hammering action that pounds the bit forward as it spins. This pulsing force breaks up concrete and masonry while the flutes clear dust. Standard drills lack this mechanism and will stall or overheat in brick or block.
There are two main types: corded hammer drills, which offer unlimited runtime and higher sustained power, and cordless hammer drills, which provide portability and convenience. Cordless models are now powerful enough for most home and professional tasks, but corded units remain cheaper and lighter for heavy-duty use.
Key specs explained
Understanding the numbers on the box helps you compare models accurately. Focus on these four specifications.
| Spec | What it means | What to look for |
|---|---|---|
| Impact energy (Joules) | Force of each hammer blow | 1.5-2.5 J for DIY; 2.5+ J for pro |
| No-load speed (RPM) | Max spin speed with no load | 0-2,000 RPM for general use |
| Blows per minute (BPM) | Hammering frequency | 0-40,000 BPM typical |
| Chuck type | How bits are held | Keyless for convenience; SDS for heavy |
What to check before buying
Battery ecosystem. If you already own tools from a brand like DeWalt, Makita, or Milwaukee, buying a hammer drill from the same platform lets you share batteries and chargers. This saves money and reduces clutter.
Chuck type. Keyless chucks are standard on most hammer drills and allow quick bit changes. For heavy masonry work, an SDS chuck provides better bit retention and impact transfer. Many cordless hammer drills now include a keyless chuck with a hammer mode switch.
Variable speed trigger. A trigger that lets you control speed from 0 to max gives you precision for pilot holes and full power for concrete. Look for models with an electronic speed control that maintains RPM under load.
Weight and ergonomics. A heavy drill causes fatigue during overhead work. Cordless models weigh 3.5-5.5 lbs with battery. A rubber grip and balanced design improve comfort.
Warranty. Most major brands offer a 3-year limited warranty on the tool and a 2-3 year warranty on batteries. Longer warranties often indicate better build quality.
Mistakes to avoid
Buying too much power. A 2.0 J hammer drill is overkill for hanging shelves in drywall. It adds weight and cost. Match the tool to your typical work: light DIY needs 1.5 J, medium work needs 2.0 J, and heavy concrete requires 2.5 J or more.
Ignoring battery compatibility. A drill from a brand you do not own means buying a new charger and batteries. This doubles the initial cost. Stick with your existing platform if possible.
Choosing a brushed motor. Brushed motors are cheaper but less efficient and wear out faster. Brushless motors deliver more power, longer runtime, and require less maintenance. They are worth the extra cost for any regular use.
Forgetting the clutch. A hammer drill without a clutch can twist your wrist if the bit binds. Look for a model with an adjustable clutch that disengages the drive at a set torque.
Overlooking dust extraction. Drilling into concrete creates silica dust that is harmful to lungs. A drill with a built-in dust collector or one compatible with a vacuum attachment is a safer choice for regular masonry work.
DeWalt DCD805B
Powerful brushless motor, excellent runtime, and smooth hammer action.
DeWalt DCD805B
Best OverallPros
- Brushless motor for long runtime
- Compact and lightweight
- Excellent hammer mode for concrete
Cons
- Battery sold separately
- No built-in dust extraction
The DCD805B is a 20V brushless hammer drill that delivers 2.1 J of impact energy. It drills through brick and block easily without bogging down. The variable speed trigger gives good control for pilot holes, and the keyless chuck holds bits securely.
Owner reviews highlight its balance and comfort during extended use. The 3-year warranty adds peace of mind. It is a top choice for DIYers and tradespeople who need a reliable all-rounder.
Milwaukee 2804-20
Best for Heavy DutyPros
- Highest impact energy in class
- Durable metal gearbox
- Excellent battery life
Cons
- Heavier than competitors
- Higher price point
The Milwaukee 2804-20 is a M18 Fuel hammer drill with a brushless motor that produces 2.5 J of impact energy. It handles rebar and thick concrete without hesitation. The all-metal chuck and gearbox add durability for job site use.
Owner reviews praise its power and reliability for continuous drilling. The 5-year warranty on the tool is the best in the segment. It is the top pick for professionals who need maximum performance.
Bosch HDH183B
Best for PrecisionPros
- Very smooth hammer action
- Lightweight and well balanced
- Low vibration design
Cons
- Lower impact energy
- Battery not included
The Bosch HDH183B is a 18V brushless hammer drill that focuses on precision and comfort. Its hammer mechanism produces less vibration than competitors, making it easier to control for accurate holes. The variable speed trigger allows fine speed adjustment.
Owner reviews note its excellent build quality and ergonomic grip. It is ideal for electricians and cabinet installers who need clean holes in masonry. The 2-year warranty is standard for the brand.
Makita XPH14Z
Best for RuntimePros
- Excellent battery efficiency
- Compact design
- Durable construction
Cons
- No belt clip included
- Chuck can loosen over time
The Makita XPH14Z is a 18V LXT brushless hammer drill that delivers 2.0 J of impact energy. Its efficient motor provides long runtime on a single charge, making it suitable for all-day use. The compact size fits into tight spaces.
Owner reviews commend its reliability and consistent performance. The 3-year warranty covers the tool. It is a strong choice for users who already own Makita batteries.
Ryobi P1813
Best BudgetPros
- Very affordable
- Compatible with Ryobi ONE+ system
- Good for light masonry
Cons
- Lower power than premium models
- Plastic gearbox housing
The Ryobi P1813 is a 18V ONE+ brushless hammer drill that offers good value for budget-conscious buyers. It produces 1.5 J of impact energy, enough for drilling into brick and light concrete. The keyless chuck and variable speed trigger work well for basic tasks.
Owner reviews note it is a capable tool for the price, though it struggles with thick concrete. The 3-year warranty is decent. It is the best entry-level option for homeowners.
FAQs
What is the difference between a hammer drill and an impact driver?
A hammer drill uses a hammering action to drill into masonry, while an impact driver uses rotational impacts to drive screws. They are different tools for different tasks.
Can I use a hammer drill as a regular drill?
Yes, most hammer drills have a switch to turn off the hammer action, allowing them to function as standard drills for wood and metal.
How much impact energy do I need?
For light DIY tasks like hanging shelves, 1.5 J is enough. For medium work like drilling into brick, 2.0 J is ideal. For heavy concrete, look for 2.5 J or more.
Are cordless hammer drills as powerful as corded?
Modern cordless models with brushless motors match or exceed the power of many corded units. Corded drills still offer unlimited runtime and lower cost for continuous use.
What is an SDS chuck?
SDS is a chuck system that uses a keyless mechanism to hold bits securely. It provides better impact transfer than a keyless chuck and is standard on heavy-duty hammer drills.
How long do hammer drill batteries last?
Battery life depends on capacity and usage. A 5.0 Ah battery typically lasts 30-60 minutes of continuous drilling. Larger batteries like 8.0 Ah double that time.
What safety gear do I need?
Always wear safety glasses and ear protection. For masonry drilling, use a dust mask or respirator to avoid silica dust. Gloves improve grip and reduce vibration.
Can I drill into metal with a hammer drill?
Yes, but turn off the hammer action. Use a sharp twist drill bit and apply steady pressure. The hammer action is only needed for masonry.
What is the best hammer drill brand?
DeWalt, Milwaukee, Bosch, and Makita are the top brands for reliability and performance. Ryobi offers good value for budget users.
How do I maintain a hammer drill?
Keep the chuck clean and lubricated. Store batteries at room temperature. Check the vents for dust buildup. Replace worn brushes on brushed models.
Our verdict
For most users, the DeWalt DCD805B is the best overall hammer drill, offering excellent power, runtime, and value. If you need maximum impact energy for heavy concrete, choose the Milwaukee 2804-20. For budget buyers, the Ryobi P1813 delivers solid performance at a low price.