How to Use a Chuck Key?
Step 1: Disassemble the Chuck
Before you begin to change the drill bit, you must first undo the hex fitting that keeps the drill bit in place. This is often a simple hex bolt you can access either on the top or below the chuck. This will be pretty easy if your tool is designed properly, so it is normal for you to get a little frustrated if it is your first try.
Step 2: Remove the Chuck
Once you get the chuck and some other parts aside, you will be able to easily remove the chuck. When you take it out, you will notice a hole in the middle. A chuck key is placed in this hole, which makes it easier to control the precise drill-bit.
Step 3: Wrap Chuck Key
Wrapping chuck key every time can strain your wrist. To prevent this, you can wrap it with a cloth or wrap it in electrical tape.
Step 4: Insert Chuck Key
Make sure you are inserting it in the right way, which is the cylinder. This ensures you will get it out when it comes time to replace the bit.
Step 5: The Bit Comes Out
You can now easily rotate the chuck key using the chuck. The drill-bit will come out effortlessly, so you need to forget about your frustrations from earlier.
Step 6: Replace the Bit
How to Change a Drill Bit Without a Chuck Key?
When you need to use a drill bit and it’s not spinning in the chuck, your only option is to remove it. This task can be a little trickier than it sounds, but it is possible to do with no chuck key at hand.
Combine the screwdriver head and drill bit in a few minutes. Switch off the power to the drill to make sure it doesn’t spin by accident. Release the trigger and unplug it.
Take a screwdriver bit with a larger diameter than the drill bit, and insert it into the chuck tube. If you don’t have a screwdriver that fits the tube, use a wrench or pliers. With the screwdriver in place, put it in between the chuck and the drill bit.
Use the bit inside the chuck tube to push the drill bit until the chuck tube is through the bottom end of the bit. The tapered part of the drill bit must be the first to pass through. Now, use the drill bit to push in the screwdriver.
Continue to move the bits until they exit the outer housing of the chuck with the bit diamond tip pointing up. Pull off the drill bit; it should come out easily.
Take the new drill bit and insert it back into the chuck tube until it catches on the chuck. Aim it so that the diamond cut is pointed down and away from the chuck.
Drill Chuck Key Sizes
¡ê NOTE: Always loosen bit in same direction it turns to avoid breaking teeth.
Drill/Driver Shank Key Sizes: (1/2 in., 5/8 in., 3/4 in., 1 in., 1-1/8 in.)
Key Sizes (1 inch): 9/32, 11/32, 11/16, 13/16, 1/2
Key Sizes (13/32 inch): 15/64, 17/64, 19/64
Key Sizes (7/16 inch): 15/64, 17/64, 19/64, 1/2