How to Change a Drill Bit Like a Pro
Safety Precautions
Before you start, it’s important to take some safety precautions:
- Always unplug the drill before changing the bit.
- If you must use the drill’s power to change the bit, squeeze the trigger gently.
- Keep your hands away from the bit to avoid injury.
- Tie back long hair and avoid loose clothing that could get tangled in the bit.
Types of Drill Chucks
The first step in changing a drill bit is to identify the type of chuck your drill has. The chuck is the part of the drill that holds the bit in place.
- Keyless chuck: The most common type of chuck. It allows you to twist the chuck with your hands to lock the bit in place.
- Keyed chuck: Found on larger, more powerful drills. Requires a key to loosen and tighten the chuck.
- Quick-release chuck: Typically found on impact drivers. Features a quick-release collet with ball bearings that hold the bit in place.
How to Change a Drill Bit on a Keyless Chuck
- Loosen the chuck by placing the drill in reverse and gently squeezing the trigger while firmly grasping the chuck.
- If the chuck is too tight, you can use tongue and groove pliers to grip it.
- Place the shank end of the new bit into the opened jaws (collet).
- Manually spin the chuck to tighten the jaws as much as possible.
- Further tighten the chuck by slowly squeezing the trigger while firmly grasping the chuck.
How to Change a Drill Bit on a Keyed Chuck
- Unplug the drill.
- Place the key into the hole in the side of the chuck and spin it counterclockwise to loosen the chuck.
- Follow the steps above to insert the new bit and tighten the chuck by spinning the key clockwise.
How to Change a Drill Bit on an Impact Driver
- Pull the collar on the quick-release chuck forward and pull the old bit out.
- Slide a locking hex-shank bit into the collet and push until it locks in place.
Tips for Selecting the Right Drill Bit
Choosing the right drill bit depends on the size and material of the hole you want to create.
Drill Bit Shank Style
- Round shank: Fits into keyed or keyless chucks.
- Hex shank: Fits into 1/4-inch quick-release couplers.
Drill Bit Shank Size
The shank size limits which drills can use the bit. Larger drills have chucks that can accommodate larger-shank bits.
When to Use Different Types of Drills
- Keyed chuck: For heavy-duty drilling or when using large bits.
- Keyless chuck: For quick and easy bit changes.
- Quick-release chuck: For use with impact drivers.
Additional Tips
- Always center the bit in the chuck before tightening it.
- Use gloves if the drill or bit is hot.
- If you’re having trouble removing a stuck bit, try using a penetrating oil or lubricant.