Rotary Hammer vs Impact Drill vs Demolition Breaker: What Is the Difference?

An impact drill, rotary hammer and demolition breaker can all be used in construction, but they do not perform the same job.

Choosing the wrong tool can make the work slower, damage accessories and place unnecessary stress on the machine. It can also create a serious safety risk.

The simplest explanation is:

• An impact drill is suitable for normal drilling and light masonry work.
• A rotary hammer is designed for drilling concrete and can perform some light chiselling.
• A demolition breaker is designed mainly for breaking and chiselling—not for drilling ordinary holes.

For construction workers, contractors, technicians and homeowners in Cambodia, understanding these differences will help you choose the correct tool for brick, concrete, tile, stone and demolition work.

Quick comparison

Factor	Impact drill	Rotary hammer	Demolition breaker
Main purpose	General drilling and light masonry	Concrete drilling and light chiselling	Heavy breaking and demolition
Typical materials	Wood, metal, brick and light masonry	Concrete, brick and masonry	Concrete floors, walls, foundations and stone
Drilling rotation	Yes	Yes	Usually no
Hammer action	Mechanical impact	Pneumatic hammer mechanism	Powerful hammering action
Chiselling	Generally no	Yes, on models with hammer-only mode	Yes
Common accessory system	Keyed or keyless chuck	SDS-Plus or SDS-Max	SDS-Max, hex or dedicated breaker shank
Typical weight	Light	Medium	Heavy
Best use	Small holes and everyday drilling	Anchor holes, concrete drilling and light removal	Breaking slabs, walls and hard material
Precision	High for general drilling	Good for concrete drilling	Low; designed for material removal
Operator effort	Low to moderate	Moderate	High

What is an impact drill?

An impact drill is a general-purpose drill with an additional hammering function.

It is also commonly called a hammer drill. In many stores, “impact drill” and “hammer drill” describe the same type of machine. This should not be confused with an impact driver, which is primarily designed for driving screws and fasteners.

An impact drill normally offers two operating modes:

1. Rotation only for drilling wood, metal and plastic
2. Rotation with impact for drilling brick and light masonry

Its hammering action is created mechanically inside the tool. The movement is fast but relatively shallow, so the operator usually needs to apply forward pressure.

Best uses for an impact drill

An impact drill is useful for:

• Drilling wood
• Drilling metal
• Drilling plastic
• Drilling brick
• Making small holes in light masonry
• Installing shelves, cabinets and fixtures
• General repairs and maintenance
• Occasional home-improvement work

Advantages of an impact drill

• Lighter and easier to handle
• Usually less expensive than a rotary hammer
• Suitable for several materials
• Accepts many common drill bits
• Good for home repairs and light professional work
• Available in corded and cordless models

Limitations of an impact drill

An impact drill is not the best choice for frequent drilling into hard reinforced concrete. It can make some small holes, but the job may be slow and require considerable operator pressure.

It is also not designed for serious chiselling or demolition.

If you regularly install anchors in concrete, drill large holes or work on construction sites, a rotary hammer will normally be more effective.

What is a rotary hammer?

A rotary hammer is a heavy-duty drilling tool designed for concrete, masonry and similar construction materials.

Unlike the mechanical impact action of an impact drill, a rotary hammer generally uses a piston-based pneumatic hammer mechanism. This delivers stronger impact energy to the drill bit with less forward pressure from the operator.

Most rotary hammers use one of these accessory systems:

• SDS-Plus for general concrete drilling and light chiselling
• SDS-Max for larger holes, heavier drilling and more demanding chiselling

The SDS system allows the bit to move backward and forward while remaining securely connected to the tool.

Common rotary hammer modes

Depending on the model, a rotary hammer may provide two or three modes:

Rotation only

Used for ordinary drilling when the correct chuck or adaptor is installed.

Rotation with hammering

Used for drilling concrete, brick and masonry.

Hammering only

Used with a chisel for removing tile, cutting channels or completing light demolition.

Always check the exact model because not every rotary hammer includes all three modes.

Best uses for a rotary hammer

A rotary hammer is suitable for:

• Drilling anchor holes in concrete
• Drilling reinforced concrete
• Installing pipes, cable supports and equipment
• Making holes for expansion bolts
• Drilling brick and block walls
• Removing tiles
• Chiselling plaster or render
• Creating small channels in masonry
• Light concrete breaking
• Construction and renovation work

Advantages of a rotary hammer

• Drills concrete faster than an impact drill
• Requires less forward pressure
• Suitable for frequent construction work
• Accepts strong SDS accessories
• Can drill larger and deeper holes
• Some models can perform light chiselling
• Available in corded and cordless versions

Limitations of a rotary hammer

A rotary hammer is heavier and usually more expensive than an impact drill.

It is also not automatically the best option for ordinary drilling into thin metal, wood or plastic. Although some models can perform rotation-only drilling with the correct chuck, a standard drill may provide better control for precision work.

A rotary hammer with a chiselling mode can remove tile or complete light breaking, but it should not replace a demolition breaker for large concrete slabs or continuous heavy demolition.

What is a demolition breaker?

A demolition breaker is a powerful hammering tool designed to break and remove hard construction materials.

It may also be called:

• Demolition hammer
• Electric breaker
• Concrete breaker
• Jackhammer
• Chipping hammer

The exact terms can vary according to the machine’s size and power.

Unlike an impact drill or rotary hammer, many demolition breakers do not provide drilling rotation. Their purpose is to repeatedly drive a chisel, point or spade accessory into the material.

Best uses for a demolition breaker

A demolition breaker is suitable for:

• Breaking concrete floors
• Removing concrete slabs
• Breaking foundations
• Demolishing masonry walls
• Breaking stone
• Removing thick tiles and mortar
• Cutting channels in concrete
• Road and pavement repair
• Heavy renovation work
• Preparing surfaces for reconstruction

Advantages of a demolition breaker

• Much stronger breaking action
• Designed for continuous chiselling
• Removes concrete faster
• Accepts heavy-duty chisels and points
• Better suited to demanding demolition
• Reduces the need for manual sledgehammer work

Limitations of a demolition breaker

A demolition breaker is heavy, noisy and produces considerable vibration. It is not designed for making clean, accurate drill holes.

It can also damage material that you intended to preserve. Before using one, the operator must identify electrical cables, plumbing pipes, reinforcing steel and structural elements inside or behind the working surface.

For small holes or light tile removal, a breaker may be unnecessarily large and difficult to control.

Impact drill vs rotary hammer

The main difference is the strength and design of the hammering system.

An impact drill uses a lighter mechanical impact action. It is suitable for general drilling and occasional small holes in brick or masonry.

A rotary hammer uses a much stronger hammer mechanism designed specifically for concrete.

Choose an impact drill when:

• You mainly drill wood, metal and plastic.
• You only occasionally drill brick or light masonry.
• The required holes are small.
• You want one affordable tool for general use.
• Low weight and control are important.

Choose a rotary hammer when:

• You regularly drill concrete.
• You need holes for anchors or expansion bolts.
• You work in construction or installation.
• You need larger or deeper masonry holes.
• You want a tool that can also perform light chiselling.
• You want faster drilling with less operator pressure.

If a worker spends several minutes forcing an impact drill into hard concrete, the rotary hammer is probably the more appropriate tool.

Rotary hammer vs demolition breaker

A rotary hammer is primarily a drilling machine that may also chisel. A demolition breaker is primarily a breaking machine.

Choose a rotary hammer when:

• The main job is drilling holes.
• Hole size and position must be controlled.
• You need to install anchors or supports.
• You occasionally remove tile or plaster.
• You need one versatile construction tool.

Choose a demolition breaker when:

• The main job is breaking concrete.
• You need to remove a slab, floor or wall.
• Drilling rotation is unnecessary.
• The work requires continuous chiselling.
• A rotary hammer is too slow for the amount of material being removed.

Which tool should you use for common jobs?

Job	Recommended tool
Drilling wood	Drill or impact drill in rotation-only mode
Drilling metal	Drill or impact drill in rotation-only mode
Drilling a small hole in brick	Impact drill
Drilling several holes in brick	Rotary hammer
Drilling anchors into concrete	Rotary hammer
Drilling large holes in concrete	Suitable rotary hammer
Installing expansion bolts	Rotary hammer
Removing wall tiles	Rotary hammer with chisel mode
Removing thick floor tiles	Rotary hammer or light demolition breaker
Cutting a small channel in masonry	Rotary hammer with chisel
Breaking a concrete floor	Demolition breaker
Breaking a foundation	Heavy demolition breaker
Demolishing a masonry wall	Demolition breaker
Precision screwdriving	Drill/driver or impact driver—not a breaker

Understanding SDS-Plus and SDS-Max

SDS-Plus and SDS-Max describe common accessory connection systems used by rotary hammers and demolition tools.

SDS-Plus

SDS-Plus is commonly used for:

• Small and medium concrete holes
• Anchor installation
• General construction work
• Tile removal
• Light chiselling

These tools are usually lighter and easier to control.

SDS-Max

SDS-Max is commonly used for:

• Larger concrete holes
• Heavier drilling
• Larger chisels
• More demanding construction work
• Medium to heavy demolition

SDS-Plus and SDS-Max accessories are not directly interchangeable. Always purchase drill bits and chisels that match the tool’s exact connection system.

Some demolition breakers use hexagonal or other dedicated shanks instead of SDS. Check the tool specification before purchasing accessories.

What does impact energy mean?

Rotary hammers and demolition breakers often show impact energy measured in joules.

The joule rating helps indicate the energy delivered by each hammer impact. A higher figure generally suggests stronger breaking capability, but it should not be the only factor in your decision.

Also consider:

• Intended application
• Tool weight
• Impact rate
• Drilling capacity
• Accessory system
• Motor power
• Vibration control
• Working duration
• Availability of compatible bits and chisels
• Warranty and service support

A powerful tool that is too heavy for the operator or too large for the job may reduce control and productivity.

Corded or cordless?

Impact drills and rotary hammers are available as both corded and cordless tools. Most large demolition breakers remain corded because heavy breaking requires substantial and continuous power, although battery-powered professional models are also available.

Corded models are suitable when:

• Electricity is available at the worksite.
• The tool will operate for long periods.
• Continuous output is important.
• You want to reduce the initial purchase cost.
• Mobility is not the main concern.

Cordless models are suitable when:

• You work in different locations.
• Power outlets are not easily accessible.
• You work on ladders, scaffolding or unfinished buildings.
• Fast setup and mobility are important.
• You already use a compatible battery platform.

For many Cambodian contractors, a cordless rotary hammer is useful for installation and mobile work, while a corded rotary hammer or demolition breaker is better for continuous heavy work.

How to choose the correct tool

Before buying, answer these questions:

1. What material will you work on?

Wood and metal generally need normal rotation. Brick can often be handled by an impact drill. Hard concrete normally requires a rotary hammer. Heavy concrete removal requires a demolition breaker.

2. Are you drilling or breaking?

If you need clean holes, choose an impact drill or rotary hammer. If you need to remove large amounts of concrete, choose a breaker.

3. How large and deep are the holes?

Small, occasional holes may only require an impact drill. Larger, deeper or repeated holes in concrete normally require a rotary hammer.

4. How often will you use the tool?

A homeowner completing occasional repairs may not need a professional breaker. A contractor drilling concrete every day should invest in a suitable rotary hammer designed for regular work.

5. Which accessories are required?

Confirm the chuck or shank system before buying drill bits and chisels. An accessory that looks similar may still be incompatible.

6. Can the operator control the tool safely?

Consider weight, handle position, vibration and working direction. Breaking a wall horizontally can be more tiring than breaking a floor downward.

7. Is local service available?

Check warranty coverage, replacement accessories, spare parts and technical support. These can be more important than choosing the lowest initial price.

Common buying mistakes to avoid

Buying an impact drill for heavy concrete work

An impact drill may make small holes in some masonry, but it is not a substitute for a rotary hammer on demanding concrete jobs.

Using a rotary hammer for major demolition

A rotary hammer can chisel, but prolonged heavy breaking may be slow and place unnecessary stress on a smaller machine.

Buying the most powerful breaker for every job

A very heavy breaker is difficult to control on walls, tiles and small renovation work. Match the machine’s size to the task.

Purchasing incompatible accessories

Check whether the tool uses a normal chuck, SDS-Plus, SDS-Max, hex or another system.

Ignoring vibration and operator fatigue

More power does not always mean more productivity. A tool that causes excessive fatigue can reduce accuracy and safe working time.

Using ordinary drill bits in hammer mode

Use masonry or concrete bits designed for the tool and application. An incorrect bit may wear quickly, overheat or fail.

Important safety precautions

Concrete drilling and demolition create dust, noise, vibration and flying material. Proper safety equipment and worksite preparation are essential.

Before starting:

• Wear safety glasses or a face shield.
• Use suitable hearing protection.
• Wear an appropriate dust mask or respirator.
• Use gloves and protective footwear.
• Inspect the cable, plug, battery, handles and accessories.
• Confirm that the bit or chisel is locked correctly.
• Use the side handle when supplied.
• Check for concealed electrical cables and water pipes.
• Keep other people away from the working area.
• Secure ladders and working platforms.
• Keep electrical tools away from rain and standing water.

During use:

• Hold the tool with both hands when required.
• Maintain a stable working position.
• Do not force the tool excessively.
• Let the tool and accessory perform the work.
• Stop if the accessory becomes jammed.
• Never touch a hot bit or chisel immediately after use.
• Disconnect the power or remove the battery before changing accessories.
• Take appropriate breaks during high-vibration work.

Concrete and masonry dust can be harmful. Whenever practical, use suitable dust extraction, wet-control methods approved for the application, or other appropriate exposure controls.

Final recommendation

Choose an impact drill for general drilling, home repairs and occasional small holes in brick or light masonry.

Choose a rotary hammer for regular concrete drilling, anchor installation, construction work and light chiselling.

Choose a demolition breaker for breaking concrete floors, walls, foundations and other heavy material-removal work.

For many professional teams, the best solution is not one tool. A workshop or construction crew may need:

• An impact drill for general drilling
• An SDS-Plus rotary hammer for anchors and everyday concrete work
• An SDS-Max rotary hammer for larger holes and heavier chiselling
• A demolition breaker for major concrete removal

Selecting the correct machine improves working speed, tool life, operator comfort and safety.

Find the right construction tool at ESE Mall

ESE Mall supplies power tools, construction tools, accessories and building materials for homeowners, technicians, workshops, contractors and project buyers in Cambodia.

Explore our Power Tools, or contact the ESE Mall team for help comparing impact drills, rotary hammers, demolition breakers, drill bits and chisels.

Tell our team:

• The material you need to work on
• The required hole size or demolition task
• How frequently the tool will be used
• Whether you prefer corded or cordless
• Your available battery platform
• Your project quantity or budget

We can then help you compare suitable options and request a quotation for business or project requirements.

Frequently asked questions

Can an impact drill drill concrete?

It may drill small holes in some concrete or masonry, but performance depends on the material and tool. For frequent work or hard concrete, a rotary hammer is normally the better choice.

Can a rotary hammer break concrete?

Yes, if the model includes a hammer-only mode. It is suitable for light or medium chiselling, but a demolition breaker is better for removing large amounts of concrete.

Can a demolition breaker drill holes?

Most demolition breakers are designed for hammering and chiselling rather than rotary drilling. Use a rotary hammer when accurate holes are required.

Is an impact drill the same as an impact driver?

No. An impact drill or hammer drill is used mainly for drilling. An impact driver delivers rotational impacts and is designed mainly for driving screws and fasteners.

Which is better: SDS-Plus or SDS-Max?

Neither is universally better. SDS-Plus is lighter and suitable for general concrete drilling. SDS-Max is designed for larger holes and heavier work.

What size rotary hammer should I buy?

Choose according to the material, hole diameter, drilling depth and frequency of use. Check the manufacturer’s stated drilling capacity rather than selecting only by motor wattage.

Do I need a demolition breaker to remove tiles?

A rotary hammer with a suitable tile chisel is often enough for light wall-tile removal. Thick floor tiles, heavy mortar or large areas may require a demolition breaker.

Can I use a rotary hammer for wood or metal?

Some models can drill wood or metal in rotation-only mode when fitted with the correct chuck and bit. A standard drill may still provide better precision and control.

Which tool is best for installing expansion bolts?

A rotary hammer with the correct concrete bit is normally the most suitable option for drilling expansion-bolt holes in concrete.