Can you use an impact driver for regular drilling? Yes, you can use an impact driver for regular drilling tasks, but it’s not ideal and can sometimes be less precise than a standard drill. An impact driver is primarily designed for driving screws and fasteners, delivering rotational force combined with percussive blows.
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Impact Driver vs. Drill: What’s the Difference?
When you’re tackling DIY projects or professional construction, you’ll often hear about impact drivers and drills. But what sets them apart, and which one should you reach for? Let’s break down the impact driver vs. drill debate.
The Core Mechanics
A standard drill, whether it’s a corded or cordless impact driver model, works by simply spinning a bit. It provides consistent rotational power. Think of it like a continuous turning motion.
An impact driver, on the other hand, adds another dimension: impact. When it senses resistance, it delivers rapid, short bursts of rotational force, called “impacts” or “hammering.” This is delivered through a mechanism that spins a cam, which then strikes an anvil. This combination of rotation and impact is what gives it its incredible driving power.
Power and Torque
This is where the impact driver truly shines. Impact driver torque is significantly higher than that of a standard drill. This means it can drive larger fasteners, into tougher materials, with much less effort from the user. A typical drill might offer 30-50 ft-lbs of torque, while an impact driver can easily deliver 100-200 ft-lbs or even more.
- Drill: Excellent for general-purpose drilling holes and driving smaller screws.
- Impact Driver: Ideal for driving long screws, lag bolts, and fasteners into dense materials.
Speed and Control
While impact drivers offer immense power, they can sometimes lack the finesse of a standard drill. Many variable speed impact driver models exist, allowing you to control the speed and thus the force applied. However, the percussive nature can still make them a bit “jumpy” for delicate tasks.
- Drill: Offers a wider range of speeds and often a precise clutch for controlling screw depth without stripping.
- Impact Driver: Primarily focused on high torque for driving. While some have speed settings, the impact action can make them less ideal for very precise drilling or delicate screw driving.
When to Choose Which
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Choose a Drill for:
- Drilling holes in wood, metal, or plastic.
- Driving small to medium-sized screws where over-tightening is a concern.
- Tasks requiring fine control and precision.
- Tasks where the noise of impact would be disruptive.
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Choose an Impact Driver for:
- Driving long screws, lag bolts, or deck screws.
- Working with dense materials like hardwoods or treated lumber.
- Any task where you need maximum driving power.
- Removing stubborn or rusted bolts.
Essential Impact Driver Bits
To get the most out of your electric impact driver, you need the right impact driver bits. These aren’t your average drill bits or screwdriver bits. They are built to withstand the shock and rotational forces unique to impact drivers.
Why Special Bits?
Standard drill bits and screwdriver bits are made for continuous rotation. The rapid hammering action of an impact driver can quickly shatter or deform these bits. Impact driver bits are constructed from specialized steel alloys, often heat-treated, to absorb these shocks and resist wear.
Types of Impact Driver Bits
- Hex Shank Bits: Most impact drivers use a 1/4-inch hex shank. This allows for quick and secure bit changes. Look for bits specifically advertised as “impact rated” or “for impact drivers.”
- Driver Bits: These are the most common. They come in various head types:
- Phillips: For cross-head screws.
- Torx (Star): Increasingly popular for their superior grip and resistance to cam-out.
- Square (Robertson): Common in Canada and some specific applications.
- Slotted (Flathead): Less common for impact drivers due to high cam-out risk.
- Drill Bits: While you can use some drill bits with an impact driver, it’s best to use those specifically designed for impact use. These will typically have a hex shank and be made of high-strength steel. They are great for pilot holes in tougher materials.
- Nut Setters: These are sockets with a hex shank, designed to drive nuts and bolts. They are invaluable for automotive work or any task involving threaded fasteners.
- Specialty Bits: You’ll find bits for specific tasks like self-tapping screws, socket adapters, and more. Always ensure they are impact-rated.
Key Features to Look For in Impact Driver Bits:
- Impact Resistance: The material and heat treatment are crucial.
- Durability: They should withstand repeated high-torque applications.
- Fit: A good fit in the screw head minimizes stripping.
- Shank Type: Ensure it’s compatible with your impact driver’s chuck (usually 1/4-inch hex).
How to Use an Impact Driver: A Step-by-Step Approach
Using an impact driver is straightforward, but following these steps ensures efficiency and safety.
Step 1: Safety First!
Before you even pick up the tool, prioritize impact driver safety.
- Eye Protection: Always wear safety glasses or goggles. Flying debris is a real risk.
- Hand Protection: Wear gloves to improve grip and protect your hands from splinters or sharp edges.
- Hearing Protection: While not as loud as some power tools, the hammering action can be noisy. Earplugs or earmuffs are recommended for prolonged use.
- Secure Workpiece: Ensure the material you’re working on is stable and won’t move. Use clamps if necessary.
- Proper Stance: Maintain a balanced stance to avoid losing control of the tool.
Step 2: Select the Right Bit
Choose the correct bit for the fastener you’re driving or the hole you’re drilling. Make sure it’s an impact-rated bit.
Step 3: Insert the Bit Correctly
Impact drivers typically have a quick-release chuck.
1. Pull back the collar on the chuck.
2. Insert the hex shank of the bit firmly into the chuck.
3. Release the collar. Give the bit a gentle tug to ensure it’s seated securely.
Step 4: Set the Direction (Forward/Reverse)
Most impact driver drills have a forward reverse impact driver switch, usually located near the trigger.
- Forward (Clockwise): For driving screws or tightening bolts.
- Reverse (Counter-clockwise): For removing screws or loosening bolts.
Some impact drivers have a central “lock” position for safety when not in use. Make sure the switch is firmly in the desired position.
Step 5: Adjust the Speed (If Applicable)
If you have a variable speed impact driver, choose a speed appropriate for the task.
- Lower Speeds: For starting fasteners or delicate work.
- Higher Speeds: For driving into tough materials or quickly running in longer fasteners.
Many impact drivers have variable speed triggers – the harder you squeeze, the faster it spins. This is often sufficient for speed control.
Step 6: Driving Fasteners
- Position the Bit: Place the tip of the bit squarely into the head of the screw or bolt.
- Engage the Trigger: Squeeze the trigger gently to start the rotation.
- Apply Pressure: Lean into the tool with steady, firm pressure. Let the impact driver do the work.
- Listen and Feel: As the fastener goes in, you’ll feel and hear the impacts. Once the fastener is snug and secure, release the trigger.
Important Note on the Impact Driver Clutch: Standard drills often have an impact driver clutch that allows you to set a torque limit, preventing over-driving and stripping screws. Impact drivers typically do not have this type of adjustable clutch. The control comes from your trigger finger and the tool’s inherent torque. This is why practice and feel are important. For extremely precise depth control, a standard drill with a clutch is often a better choice.
Step 7: Drilling Holes
- Select a Suitable Drill Bit: Use an impact-rated drill bit with a hex shank.
- Position and Start: Place the tip of the drill bit on your marked spot. Start the drill at a slow speed to create a pilot divot.
- Increase Speed: Once the bit is seated, increase speed and apply steady pressure. The impact action will help the bit cut through harder materials.
- Clear Debris: For deeper holes, periodically withdraw the bit slightly to clear wood chips or metal shavings.
Common Impact Driver Uses
The versatility of an impact driver makes it a go-to tool for many impact driver uses.
Driving Screws and Lag Bolts
This is the primary function. Whether it’s assembling furniture, building a deck, or framing a wall, an impact driver makes driving long and large fasteners a breeze.
Working with Dense Materials
Hardwoods, treated lumber, and metal studs are no match for the torque of an impact driver. It can drive screws into these materials without bogging down or requiring pre-drilling as often.
Removing Stubborn Fasteners
The impact action is also excellent for loosening rusted or overtightened bolts and screws. Simply set the forward reverse impact driver switch to reverse and apply the trigger.
Automotive Repairs
From changing tires (with appropriate socket adapters) to working on engines, impact drivers are invaluable for their speed and power in automotive applications.
Construction and Carpentry
Framing, sheathing, decking, and general construction tasks all benefit from the efficiency of an impact driver.
DIY Projects and Home Improvement
Assembling flat-pack furniture, hanging shelves, installing cabinets – these and many other home improvement tasks are made easier and faster with an impact driver.
Variable Speed Impact Driver: Mastering Control
While all impact drivers deliver power, the presence of a variable speed impact driver offers a significant advantage in control.
How Variable Speed Works
Most variable speed impact drivers utilize a pressure-sensitive trigger. The more you squeeze, the faster the tool spins and impacts. This allows for a gradual build-up of speed.
Some models also feature electronic speed control buttons or dials that allow you to set a maximum speed. This is particularly useful for ensuring consistency across multiple fasteners or for specific applications.
Benefits of Variable Speed
- Starting Fasteners: Begin driving screws at a slow speed to ensure the bit is perfectly aligned with the screw head, preventing stripping.
- Delicate Tasks: For smaller screws or softer materials, a slower speed reduces the risk of over-driving or damaging the workpiece.
- Material Adaptation: Easily adjust to different materials, from soft pine to hard oak or metal.
- Reduced Cam-Out: By starting slowly and increasing power gradually, you can minimize the bit “camming out” (slipping out of the screw head).
Understanding the Impact Driver Torque
The impact driver torque is the measure of rotational force it can deliver. It’s typically measured in Newton-meters (Nm) or foot-pounds (ft-lbs).
What Torque Means for You
- Higher Torque = More Power: A higher torque rating means the driver can exert more twisting force. This is essential for driving large fasteners, especially into dense materials.
- Fastener Size: Longer and thicker screws require more torque to drive.
- Material Density: Driving into hardwoods or metal will demand more torque than driving into soft pine.
Torque vs. Speed
It’s important to note that torque and speed are different. An impact driver might have high torque but a limited speed range, or vice-versa. For most impact driver uses, a good balance of both is desirable.
Impact Driver Safety: A Deeper Dive
Beyond the basic PPE, there are other impact driver safety considerations:
Battery Safety (for Cordless Models)
- Handle Batteries with Care: Avoid dropping or puncturing lithium-ion batteries.
- Use the Correct Charger: Only use the charger specifically designed for your battery model.
- Storage: Store batteries in a cool, dry place away from direct sunlight and metal objects.
Tool Handling
- Maintain a Firm Grip: Always hold the impact driver with both hands if possible, especially when using high torque.
- Avoid Awkward Positions: Don’t overreach. If a position is awkward, reposition yourself or the workpiece.
- Keep Clear of Rotating Parts: Be mindful of the spinning bit and keep your hands and clothing away.
- Know Your Tool: Read the manufacturer’s manual to familiarize yourself with your specific model’s features and safety instructions.
Situational Awareness
- Clear Your Workspace: Remove any trip hazards or unnecessary items from your work area.
- Ventilation: If working indoors, ensure good ventilation, especially if cutting or drilling materials that produce dust.
- Electrical Safety: If using a corded model, ensure the cord is in good condition and avoid using it in wet conditions.
The Role of the Impact Driver Clutch
As mentioned, impact drivers differ from drills in their clutch mechanism. A standard drill’s impact driver clutch is an adjustable ring that allows you to set a maximum torque. Once that torque is reached, the clutch disengages the motor from the chuck, preventing the screw from being driven too deep or stripping the head.
Impact drivers, by their nature, achieve their power through rotational impacts. They generally do not have this type of adjustable torque-limiting clutch. The closest thing to clutch control is:
- Trigger Control: Your ability to modulate the trigger to control speed and power.
- Speed Settings: If your model has electronic speed settings, you can choose a lower setting for less aggressive driving.
- Electronic Braking: Most modern impact drivers have electronic brakes that stop the rotation almost instantly when you release the trigger. This prevents the bit from continuing to spin and potentially damaging the workpiece or fastener after the job is done.
This absence of a traditional clutch means that achieving precise depth control, especially with smaller screws, requires more practice and a gentler touch on the trigger.
Electric Impact Driver vs. Cordless Impact Driver
The choice between an electric impact driver (corded) and a cordless impact driver (battery-powered) often comes down to your specific needs and preferences.
Corded Electric Impact Drivers
- Pros:
- Consistent, unlimited power supply. No need to worry about battery life.
- Often more affordable upfront.
- Can be lighter as they don’t house a battery.
- Cons:
- Limited by the length of the power cord and proximity to an outlet.
- The cord can be a snagging hazard.
- Less portable for jobs away from power sources.
Cordless Impact Drivers
- Pros:
- Unmatched portability and freedom of movement.
- Ideal for job sites without easy access to power outlets.
- Modern battery technology offers excellent runtime and power.
- Cons:
- Dependence on battery charge. You might need spare batteries.
- Batteries and chargers can add to the overall cost.
- Batteries add weight to the tool.
For most DIYers and many professionals, the convenience and portability of a cordless impact driver make it the preferred choice.
Maintaining Your Impact Driver
To ensure your tool lasts and performs optimally, follow these maintenance tips:
- Keep it Clean: Brush away dust and debris from the tool, especially around vents.
- Battery Care: For cordless models, follow the manufacturer’s recommendations for charging and storage.
- Chuck Maintenance: Keep the chuck free of debris. Occasionally, a drop of light oil can help it function smoothly (check your manual).
- Inspect Bits: Regularly check your impact driver bits for wear or damage. Replace them promptly if they show signs of stress.
- Storage: Store your impact driver in its case or a clean, dry environment when not in use.
Frequently Asked Questions (FAQ)
Q1: Can I use an impact driver as a regular drill?
A1: Yes, you can use an impact driver for drilling holes, but it’s not its primary function. Use impact-rated drill bits and start at a lower speed for better control. For precision drilling or when using standard drill bits, a regular drill is usually a better choice.
Q2: What are the main impact driver uses?
A2: The primary uses are driving screws and lag bolts, especially long or large ones, and working with dense materials. They are also excellent for removing stubborn fasteners and in automotive applications.
Q3: Why do I need special impact driver bits?
A3: Standard bits are made for continuous rotation. The hammering action of an impact driver will quickly break or wear out regular bits. Impact driver bits are made from specialized steel and heat-treated to withstand the shock and torque.
Q4: How do I control the depth when driving screws with an impact driver?
A4: Impact drivers typically lack the adjustable clutch found on standard drills. Depth control is achieved through careful trigger management – feathering the trigger to slow down as the screw nears the desired depth – and practicing to develop a feel for the tool. Some models have electronic speed settings that can help.
Q5: Is an impact driver vs. drill better for all tasks?
A5: No. An impact driver excels at driving fasteners with high torque. A regular drill is better for precision drilling, using standard drill bits, and tasks requiring fine torque control via a clutch. They are complementary tools, not replacements for each other.
Q6: What is impact driver torque?
A6: It’s the rotational force the tool can deliver, measured in Newton-meters (Nm) or foot-pounds (ft-lbs). Higher torque means more power to drive fasteners, especially in tough conditions.
Q7: How do I ensure impact driver safety?
A7: Always wear eye protection, consider hearing protection, maintain a secure grip, ensure your workpiece is stable, and be aware of your surroundings. Read your tool’s manual for specific safety guidelines.
Q8: What does variable speed impact driver mean?
A8: It means the driver allows you to control the speed at which it operates. This is usually done via a pressure-sensitive trigger or electronic speed settings, providing better control for different tasks.
Q9: Is a cordless impact driver better than a corded one?
A9: A cordless impact driver offers superior portability and freedom of movement, making it the preferred choice for most users. A corded model provides a constant power supply but is limited by the cord’s reach and can be a tripping hazard.