Best Hammer Drill. Hammer drills are power tools that work like standard drills. They have a hammering function that drives the drill bit into the soft or rigid material while the drill bit rotates.
This impact helps the drill bit get through like block, concrete, wood, plastic, brick, and block. They can be used by DIYers or professionals.
What are hammer drills?
A hammer drill is made for drilling holes into concrete, brick, rock, and masonry. It is a tool that can provide more and much better power in the form of a hammering motion or hammering action.
The powerful force of the device is applied to the bit. Its hammering motion can be turned off, so the tool can function more like a regular standard drill.
The tool can perform with astonishing speed and easy to use. It combines hammering action or concussive blows with bit rotation.
Once the drill rotates the bit, it will pulverize brick or concrete. If you use a regular standard drill, you can drill a hole three to four times slower than using a hammer drill.
You can compare this tool with a mini-jackhammer. A rotating drill bit can force a hammer pounds to blast holes into the most abrasive and most rigid masonry materials.
To accomplish the work, you should use carbide-tipped masonry bits. Find the best hammer drill if you want the best performance.
The advantage of using a hammer drill
1. For masonry screws
Professional plumbers and electricians own hammer drills to use the tool all the time to drill pilot holes for masonry screws. These masonry screws are also known as Tapcon.
2. No anchor needed
They do not need an anchor but require thread right into the hole. The result of drilling the pilot holes must be accurate. The best way to bore these holes is to use a hammer drill. Besides that, the masonry screws must be held securely using the masonry drill bit.
3. Powerful tool
It is so powerful that its speed and power can blast through the hard concrete and gravel it encounters.
4. Split stones and boulders
There is an easy way to split large stones and boulders by using iron wedges and feathers. The process begins with drilling a series of holes into the boulder with this device. After that, insert into every hole one wedge and two iron feathers. Get a small sledgehammer to tap each wedge deeper into the holes. It will stop when the boulder cracks into two parts.
The tool is reliable enough to drill into mortar joints or brick. Mortar joints are easier and softer to drill. Anchors and screws can be used to bite securely into a brick. When it is switched off, it can drill holes and drive screws into materials.
Main components of hammer drills
1. Power source
Most hammer drills are corded hammer drills (AC) or cordless hammer drills (DC). You can work as much time as you can without the need for a recharge. Simultaneously, cordless models will have to recharge, but it gives you maneuverability.
2. Drill bit
a. The shank
The shank is the part or portion that fits into the hammer drill collar. This part holds the collar securely as the power tool delivers the impact and rotation during operation.
Standard shank designs include spline shanks, SDS-MAX, or SDS that lock securely into the chuck. The lock mechanism will not dislodge the drill bit.
b. The tip
Carbide is blended into the drill bit head to strengthen and harden for breaking up the rigid concrete. Carbide tip can be damaged in extreme heat, melting or dulling it away entirely. This extreme temperature can lower the strength of the tip to break the concrete.
c. The land
The land is the raised part of the spiral part of the hammer drill bit. This part holds the cutting edges of the drill bit on the outside diameter.
d. The flute
The flute runs parallel to the land to eliminate dust from the hole as the hole is being drilled. This portion can prevent jamming.
e. The head
The head holds the tip and is located at the lead point of the drill bit. It gives maximum collision in breaking up the rigid concrete. Depending on the number of flutes, the head will have two or four flat angles for the lead cutting action.
3. Drill chuck
Drill chucks are parts that hold a drill or a cutting tool on a spindle. For fast replacement of a drill bit, drill chucks are available in hybrid, keyless, or key systems.
Keyed Drill chucks are designed to tighten or loosen the hold on a hammer drill by using a key.
The movement of your finger can activate a trigger. It is a switch that starts and activates the electric motor of the power tool. When the motor runs, it drives a rotating drill chuck.
A wide variety of accessories can fit into the drill chuck. You can drill holes, drive screws, polish, sand, and grind materials.
5. Drill shaft
The motor of a hammer drill is located in the drill shaft. This region of the tool separates the trigger and the chuck.
6. Reverse switch
You can choose the bit to spin reverse or forward by pushing a switch near the trigger. If you are going to drill into a workpiece, you use the forward feature.
On the other hand, if you are going to extract materials, you use the reverse switch. The reverse switch works following screws.
7. Gear selection switch
If you own a hammer drill that can switch gears, there is a switch on the top. The torque and speed on a hammer drill are inverse. You will have less torque when you are at high speed. You will have more torque and when you are at low speed.
Some models may have three or four gears. Some other models might have electronic controls above the battery.
Today’s hammer drill has an ergonomically designed handle grip to make the drilling job less fatigue and as comfortable as possible. You hold the power for minutes, and the handle grip can ease the fatigue.
Types of hammer drill
If you do not have access to a power outlet, a cordless hammer drill is the best option for a drilling job. The tool is portable, and the latest 18+ volt models can match a corded hammer drill’s power.
Corded hammer drills can only operate if there is a power outlet nearby. You can drill through rigid and tough material because of the consistent and high amount of power the hammer drill can produce.
Your drilling job can finish a lot faster if the hammer drill has more power. To make the job more flexible, you need to provide a good-quality extension cord.
A dedicated hammer drill or also known as a rotary hammer is a tool for finishing many masonry drilling to do. Since the price is high, you need to rent the device.
Factors to consider when purchasing a hammer drill
1. The purpose
If you plan to purchase a hammer drill, you must discover what type of job you will have. A small hammer drill may not be sufficient and powerful enough for a more significant project.
A better performance hammer drill is the right option for larger tasks. It would be better to purchase a bigger power hammer drill so you can finish the job.
2. Safety feature
While working with a hammer drill, do not want to have accidents happening. Today, most models in the market come with added safety features to make sure that you are safe when you use the equipment. You need to consider some safety features, including an integral clutch, overheating protection, and automatic bit locking.
The weight of a hammer drill affects the way you handle the device while using it. A short-duration job is more likely because of the pressure on your arm.
The power tool must have a proportional weight to maximize your drilling job without sacrificing the strain on your arms. Some models are lighter than other models.
A lighter model is much easier to maneuver than a bulkier hammer drill.
You can find a hammer drill that weighs eight pounds or up to fourteen pounds. You must be careful because you might purchase a full-size hammer drill when you need a compact device.
4. Ergonomic and handling
You want to consider how well the hammer drill handles and its ergonomic design. A user should pay attention to the size of the trigger.
Measure the trigger if it is big enough for one finger. There are some tools with different controls that can be bumped accidentally.
Some device models must use both hands to hold the tool and may find the other’s adjustment button. That can be an irritation and can be dangerous.
Many hammer drill models incorporate ergonomic design grips that have been proven to cause less pressure on the arms and hands. These models reduce user fatigue and carpal tunnel syndrome among people who use these tools regularly.
5. Variable speed
During drilling, sometimes you need your hammer drill to run slower or faster to enhance penetration and accuracy while preventing damage to the tool itself. An excellent quality hammer drill will feature a trigger control or variable speed setting dial for adjusting the operating speed.
A hammer drill equipped with a variable speed setting has a dial that shows the numbers from one to two, or sometimes one to three. To go fast, number three is the fastest setting.
6. Drill mode or hammer mode
A hammer drill has a button for switching between normal mode or drill mode and hammer mode. It may be marked or drawn by a sign or symbol that resembles a drill bit (different models have different symbols).
Drill mode means that you have more control over the torque. The drill mode is intended for drilling holes through softer surfaces, including plastic or wood.
There is also a hammer mode that is marked by a sign or symbol depicting a hammer. When you choose this hammer mode, it helps drive masonry bits through hard surfaces, including stone, brick, and concrete.
With this mode, the drill maintains its rotational capabilities to punch and drill through very challenging and rigid material.
FAQ hammer drills
Why is the workpiece cracking?
One significant trouble hammer drill users have when drilling through hard surfaces is these materials will shatter or crack. The cause of cracking is when there is too much force applied against the material.
To avoid craking materials, all you have to do is to increase the amounts of pressure gradually. Stop increasing the pressure when the drill reaches a maximum amount of power.
Why is the drill bit stop working?
You may face another big trouble when drilling through tile or concrete when the drill bit stops drilling into the hard material. This trouble may be caused by the bit’s flutes not carrying enough material out of the hole. The other cause of a jammed or bound drill bit is when the bit contacts a piece of rock.
The material buildup problem can be fixed by moving the bit down and up in the hole every thirty seconds while drilling. Or keep a small length of tubing by blowing the dust out of the hole.
Bit jamming happens when your drill bit contacts a piece of rock, and it can not break. Insert a concrete nail in the hole and strike the nail with a hammer until it breaks the rock. Use more force with the hammer if the rock will not break.
Why the drill perform poorly?
You might set the variable speed wrong. The hammer drill usually has two modes: a drill and hammer mode.
You have to make sure that you are using the right mode for suitable material. The hammer setting is for drilling rigid materials like concrete blocks, brick, and mortar. The tool will not perform if the mode is not set to either drill or hammer mode.
Why do the drill bits keep falling out of the chuck during drilling?
Why the trigger jam?
A switch is located above the trigger that lets the user put the drill in reverse or forward. You have to make sure that the switch is in reverse or forward. If it is in the center position, the trigger of the drill will not function.
If the trigger is stuck, clean the trigger using a damp cloth. First, open up the drill casing. Clean out debris or dust that may have accumulated within the trigger.
Top 10 hammer drill comparison chart
|1. DEWALT 20V MAX XR – DCD996P2||Cordless||$$$||4.7|
|2. Milwaukee Hammer Drill 2704-20 M18||Cordless||$$$||4.6|
|3. Bosch SDS Hammer Drill 11255VSR||Corded||$$||4.8|
|4. HILTI Hammer Drill 3536723 SF 2H-A||Cordless||$$||5.0|
|5. RYOBI Hammer Drill P214KSB ONE+ 18V||Cordless||$$||4.8|
|6. Makita Hammer Drill XPH07Z 18V LXT||Cordless||$$||4.7|
|7. Bosch SDS Hammer Drill 1-1/8-Inch Rotary Hammer||Corded||$$$||4.7|
|8. Monkey King Bar-Sds Max SDS Hammer Drill||Corded||$||3.7|
|9. Milwaukee SDS Hammer Drill 2715-20 M18||Cordless||$$$||4.7|
|10. Milwaukee SDS Hammer Drill 2416-22xc M12||Cordless||$$$||4.7|
5 best hammer drill reviews
1. DeWalt Hammer Drill 20V MAX XR Battery-powered Hammer Drill, Brushless, 3-Speed (DCD996P2)
The DEWALT Hammer drill DCD996P2 is considered one of the best tools for drilling on the market, and you can choose it as your premium choice. The device is crafted for the needs of masonry and construction work.
You can complete any task on time provided by the 20-minute shutoff function. The device product by DEWALT is equipped with battery packs to come with a fuel gauge to give you information on how much run time the batteries have left.
Every user can use it to make holes for nails and screws. The best feature is its capability to offer light for construction workers in dark areas.
This tool can provide 0 to 38, 250 BPM for fast drilling in construction or masonry materials.
2. Milwaukee Hammer Drill 2704-20 M18 FUEL 1/2″ Cordless, Battery-powered
The Milwaukee Hammer Drill 2704-20 ½-Inch is a cordless hammer drill with great design, superior battery technology, and an investment well worth your while. Its brushless motor technology provides a much more efficient tool.
Its length a 7.75-inches and weighs 3.5 pounds. This device has a maximum of 32,000 BPM and up to 1,200-inch/pounds of torque.
Brushless motors are a longer tool lifespan and less maintenance without sacrificing power. This product offers RedLink Plus Intelligence for protecting the tool and effectively prevents the device from overloading and overheating.
It has two variable speed settings of 0 to 550 and 0 to 2,000 RPM to provide productivity in most workplaces.
3. Bosch SDS Hammer Drill 11255VSR Bulldog Xtreme Corded
This Bosch SDS Hammer Drill 11255VSR has a build quality and comfortable handle with a D-grip design for greater control. The grip has a standard adjustable side-handle that you may rotate around the tool.
Other features of the corded drill including the SDS-plus bit system, the integral clutch, and the Vario-lock positioning. This product is equipped with a 7.5 AMP motor that can deliver 1,300 RPM and 5,800 BPM for maximum performance and power of handling big pieces of thick rigid materials.
This product has a speed that allows more accurate and precise drilling. Its trigger supports a two-finger pull, with a special selector button for switching between the modes.
The motor has an impact energy of 2.2 feet per pound for highly efficient drilling and chiseling.
It is a rotary hammer drill with a large trigger and can be covered by two fingers. There is a depth stop for limiting the maximum drilling depth.
Its SDS-plus bit system will let you do quick bit replacement and automatic bit locking. The Vario-lock feature allows a change of the chisel’s orientation. An integral clutch is for minimizing the torque reaction and protects the gears from damage.
4. HILTI Hammer Drill 3536723 Hilti SF 2H-A Cordless
This HILTI Hammer Drill 3536723 SF 2H-A is a 12V sub-compact class cordless hammer drill powered by a Li-ion battery. The chuck is a 10-mm keyless for light-duty applications.
Its chuck clamping range is 1/32-inch to – 13/32-inch.
This product’s motor is protected with temperature, voltage, and current sensors. The Hilti product has a no-load RPM of gear 1: 400 RPM, and 2nd gear: 1500 RPM.
The design is compact so that you can handle work in tight corners. Its handle grip is ergonomic and balances for optimum drilling comfort.
The device can offer a maximum torque of 106 in-lb soft joints and 212 in-lb hard joints. You can have a high productivity drilling job with a drilling speed of up to 1,500 per minute.
5. RYOBI Hammer Drill P214KSB ONE+ 18V Cordless 1/2-inch Cordless/Driver Kit
Two 1.5 amp hour-compact batteries power the RYOBI P214KSB. The 30-minute charger can provide you going all day with driving or drilling tasks. If you have an aggressive drilling task, it will drain the battery quickly.
The motor runs at 2-speed with 600-inch pounds of torque in low-speed running at 375 RPM. If you choose low-stress applications, they can perform quickly at 1,600 RPM.
When you need an exact amount of torque, twenty-four clutch positions can help dial in for driving applications to avoid damage to your work. You can do light concrete or masonry drilling with the clutch-overriding drill and hammer drill modes.
To help light a darker area during the drilling, there is a standard bottom-mounted LED light.
Common problems with a hammer drill
1. The drill bits jam
When a drill bit comes into contact with a hard material it may unable to cut. The drill bit may bind up in the hole. There is no chance of removing it. To solve this problem, unplug the hammer and uninstall the drill bit from the hammer drill. Using a Stillson wrench, remove it from the hole by turning it counter-clockwise. The blockage should be cleared with a concrete nail.
2. Chips of the material being drilled break
When this occurs, it can be dangerous because these are sharp pieces and can cause injury. To minimize this (also called spawling), you have to reduce the amount of pressure on the drill. Some models provides a rubber cup that fits over the end of the chuck. The cup will minimize the amount of materials that are fly away or break off. You can also call this rubber cup as spawl shield.
3. The drill bits stop drilling
The drill bits may stop drilling through concrete or tile which is caused by the flutes of the bit are not carrying enough material out of the hole. The other cause is that the bit comes into contact with a piece of rock.
You can solve the material build-up by slowly moving the bit up and down in the hole every thirty seconds during drilling. Keep a small length of tubing or straw to blow the dust out of the hole.
Almost all of the time, when the drill bit contacts a small rock it can not break. Insert a concrete nail or pointed rock punch in the hole and strike it sharply with a hammer until breaking the rock.
4. The workpiece cracks
When drilling through brittle or hard surfaces the material being drilled will shatter or crack. The reason for this is when using too much force when drilling the material. To prevent the crack, use gradually adding amounts of pressure. Stop adding the pressure when the amount of material being pushed out of the hole reaches a maximum amount.
The safe work procedures
Inspect plug and lead for crack or damage. You need to make sure that the connection is clean and that the hose connects securely to the spigot. Make sure the T-handle is attached when using drill bits.
2. Pre-start checks
Check casing for crack or damage, and missing screws. Inspect chuck segments for distortion, nicks, wear, and ensure the chuck is secure. Inspect the drill bit and make sure that each segments are not worn or chipped. The drill stem is undamaged and clean. Use the right chuck key to tighten the chuck. Make sure the chuck is tight.
2. During operation of hammer drill
Adopt comfortable and good posture when using hammer drills. Do not bend. make sure to utilize load or leg support when using a large drill to drill into walls. Avoid having leads or hoses in the area. Always wear protective equipment when drilling concrete, brick, or stone. Ear protection should be used when drilling hard materials including concrete, stone, or brick when using larger drills. Check for pipes, conduits, or cables behind or in the walls before drilling.
Hammer drill maintenance
- Make sure the tool is isolated from the electrical supply. Switch off and remove the plug from the socket, before starting any maintenance activities or adjustments.
- Clean the tool regularly, using a soft cloth or soft brush.
- Never use any chemicals or harsh abrasives to clean the tool.
- Remove and inspect the motor brushes on a regular basis
- Refit the motor bushes exactly as they are removed.
- Never turn them or swop their positions.
- Worn and dirty motor brushes may result in loss of power or excessive sparking.
- Replace motor brushes in pairs.
- Inspect gearbox regularly and top up with a good quality high melting point gearbox grease.
- Never to overfill the gearbox, just apply enough grease to cover all visible moving parts only.