Video: How To Change A Drill Bit

How To Change A Drill Bit - Video Transcript

Speaker: One of the most common things we do in a wood shop is changing out all the different types and sizes of drill bits to the point where it starts to feel like second nature, but there are a few things to keep in mind to ensure success. The part of the drill that holds the bit in place is called the chuck. Inside the chuck there are three jaws, which you can see when you rotate the collar, the jaws either open or close depending on which direction you are rotating the collar.

The most important thing to remember when you're installing a drill bit is to make sure that the drill bit is centered between all three jaws of the chuck. It's typically not a problem with a larger drill bit, but with a smaller bit it can actually get stuck between two out of the three jaws of a chuck like this. You can still tighten it down, but you won't be able to drill a hole because the bit will be spinning off-center. Now that you understand how the drill bit is held in place, let's talk a little bit about chucks.

The first is called a keyless chuck. That's typically what you are going to find on most portable drills. How this works is you just install the drill bits, make sure it's centered between the jaws, and turn the collar until it's tight. The second type of chuck you're going to run into in a wood shop is called a keyed chuck. Typically, those are going to be found on older or larger portable drills or on a drill press. These chucks are tightened and loosened using a key that looks like this. When you're installing a drill bit in a keyed chuck, the same principles apply. Just center the drill bit in all three jaws, and then you're going to tighten them by hand to start, and then you'll use the key to finish tightening. It's a good idea to tighten it in all three holes.

Remember, when you're changing drill bits, center the bit between all three jaws and snug the chuck down tight and you'll have great results.