How to Use a Combi Drill Safely
A combi drill is one of the most versatile power tools in any workshop, but its power and speed demand respect. This guide covers the essential safety steps, best practices, and common mistakes to avoid before you pull the trigger.
Quick answer
To use a combi drill safely, always wear impact-rated safety glasses, check the clutch setting before starting, secure your workpiece with clamps, and never force the drill. The most reliable models for safe, controlled drilling and driving come from brands like DeWalt and Makita, which feature robust electronic clutches and anti-kickback technology.
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Research updated June 2026.
DeWalt DCD796 Combi Drill
Excellent torque control and anti-kickback make it one of the safest combi drills for beginners and pros.
Why Safety Matters with a Combi Drill
A combi drill combines hammer action for masonry with high-torque driving for screws. That dual capability means it can bite into hard materials suddenly, causing the tool to twist or kick back. According to aggregated owner reviews from major retailers, the most common injuries from combi drills are wrist strain from kickback and eye injuries from flying debris. Using the drill correctly from the start prevents these issues.
What to Check Before Using a Combi Drill
Before you plug in or attach a battery, inspect the drill for visible damage. Check the chuck for cracks, the trigger for smooth operation, and the ventilation slots for blockages. For cordless models, ensure the battery terminals are clean and the pack is not swollen. Always confirm that the drill bit is sharp and correctly sized for the material you are drilling. A dull bit forces you to push harder, increasing the risk of slipping.
Personal Protective Equipment (PPE) You Must Wear
Safety glasses are non-negotiable. Even a small chip of masonry or wood can cause permanent eye damage. Hearing protection is recommended when using hammer mode, as the noise level can exceed 85 dB. Work gloves improve grip and protect against splinters, but avoid loose-fitting gloves that could get caught in the chuck. Steel-toe boots are advisable if you are drilling into floors or handling heavy materials.
How to Set the Clutch Correctly
The clutch collar on a combi drill controls the torque. For driving screws, set the clutch to a low number (1-4) to avoid stripping the head or snapping the screw. For drilling wood or metal, set the clutch to the drill symbol (often a drill bit icon) which disables the clutch and delivers full torque. Never start a drilling job with the clutch set to a high number; always start low and increase if the drill stalls.
How to Hold the Drill for Maximum Control
Grip the drill with your dominant hand on the main handle and your other hand on the auxiliary handle (if fitted). The auxiliary handle provides leverage and helps counteract the rotational force if the bit binds. Keep your elbows slightly bent and your feet shoulder-width apart for a stable stance. Do not hold the drill by the body or the battery pack, as this reduces control and increases the risk of dropping the tool.
Drilling Technique: Start Slow, Then Speed Up
Mark the drilling spot with a center punch or a nail to prevent the bit from wandering. Start the drill at a low speed and apply gentle, steady pressure. Once the bit has penetrated the surface, you can increase the speed. For masonry, use the hammer function and let the drill do the work; do not lean on it. For metal, use a center punch and a slower speed with cutting oil to reduce heat and bit wear.
How to Avoid Kickback
Kickback happens when the bit jams and the drill suddenly twists in your hands. To prevent it, always use a sharp bit, avoid excessive pressure, and ensure the drill is perpendicular to the work surface. If you are drilling into a stud or a thick piece of timber, drill a pilot hole first. Many modern combi drills from brands like Bosch and Milwaukee include electronic anti-kickback sensors that stop the motor if a bind is detected.
Battery Safety for Cordless Combi Drills
Lithium-ion batteries can overheat if the drill is stalled for more than a few seconds. If you stall the drill, release the trigger immediately and allow the motor to cool. Never force the drill to continue turning when the bit is stuck. Store batteries in a cool, dry place away from direct sunlight. Do not charge a battery that is hot; let it cool to room temperature first.
Common Mistakes to Avoid
One of the most frequent mistakes is using the hammer function on wood or metal, which can damage the material and the bit. Another is failing to secure the workpiece; always clamp it down or use a vice. Do not wear loose clothing or jewelry that could get caught in the chuck. Finally, never carry a combi drill by the cord or the battery pack; always use the handle.
Maintenance for Safety
Clean the chuck regularly with a dry cloth to remove dust and debris. Lubricate the chuck jaws with a light machine oil every few months to keep them moving freely. Check the carbon brushes on brushed motors every 50 hours of use; worn brushes can cause sparking and motor failure. For brushless models, simply keep the ventilation slots clear.
What to Do If the Drill Gets Stuck
If the bit jams in the material, release the trigger immediately. Do not try to reverse the drill while it is under load, as this can damage the gearbox. Instead, switch the drill to reverse mode and gently pull the trigger while pulling the drill straight out. If the bit is still stuck, use a pair of pliers to twist it out manually.
FAQs
Can I use a combi drill as a screwdriver?
Yes, but you must set the clutch to a low torque setting to avoid stripping the screw head or damaging the material. For delicate work, use a dedicated screwdriver or an impact driver.
Do I need to wear gloves when using a combi drill?
Gloves are recommended for grip and protection against splinters, but avoid loose-fitting gloves that can get caught in the chuck. Tight-fitting work gloves are safest.
What does the hammer symbol mean on a combi drill?
The hammer symbol indicates the hammer action mode, which is used for drilling into masonry, brick, or concrete. It should not be used on wood, metal, or plastic.
How do I change the drill bit safely?
First, ensure the drill is switched off and the battery is removed (or unplugged). Then, turn the chuck counterclockwise to open the jaws, insert the bit, and tighten clockwise by hand or with the chuck key.
Why does my combi drill keep stalling?
Stalling is usually caused by a dull bit, excessive pressure, or the clutch set too low for the material. Check your bit sharpness and increase the clutch setting gradually.
Can I use a combi drill in the rain?
No, combi drills are not waterproof. Using them in wet conditions increases the risk of electric shock and damage to the motor. Always work in a dry environment.
What is the safest speed for drilling into metal?
For metal, use a slow speed (around 500-1,000 RPM) and apply cutting oil to reduce heat. High speeds can cause the bit to overheat and break.
How often should I replace the carbon brushes?
Carbon brushes in brushed motors should be checked every 50-100 hours of use. If they are less than 6 mm long, replace them to avoid motor damage.
Is it safe to use a combi drill with one hand?
No, you should always use two hands for maximum control, especially when drilling into hard materials. One-handed use increases the risk of kickback and loss of control.
What should I do if the drill bit breaks?
Release the trigger immediately and remove the battery. Use pliers to extract the broken bit from the chuck. Inspect the chuck for damage before using the drill again.
Can I charge the battery immediately after heavy use?
No, let the battery cool to room temperature before charging. Charging a hot battery can reduce its lifespan and pose a fire risk.
What is anti-kickback technology?
Anti-kickback is a safety feature in some combi drills that automatically stops the motor if it detects a sudden bind or rotation. This helps prevent wrist injuries.
Our verdict
Using a combi drill safely comes down to preparation, correct technique, and the right tool. For most users, the DeWalt DCD796 offers the best balance of power and safety features, including reliable anti-kickback. For a budget-friendly option, the Makita DF333D provides solid torque control and a compact design that reduces fatigue.