My drill bit doesn't remain secure in the chuck of my drill.

There is supposed to be a Phillips head LH thread screw in the chuck. I have seen the screw head worn down so you can no longer get a screwdriver to work.
We usually cut the chuck off with a metal chop saw just at the screw - thread what remains of the chuck off, which usually leaves 1/4" of the screw sticking out of the spindle - remove with vise grips.
Its not an easy prospect when that happens.

some drill bits have a certain way to be installed,if not put in correctly it will loosten up

You might have oil escaping past the ram seal. Other than grease for the chuck you should not have anything getting on your bits. I would have it checked out since it is so new.

Chuck the handle of the chuck key in the chuck.Find a drill bit that fits in one of holes that the chuck key fits in.Then use a flat screw driver to lever off of the drill bit and the teeth to tighten the chuck .Use a towel and hold the drill motor,be careful not to squeeze to tight just enough to hold the drill from moving.Use a harmer and strike the chuck key and that should loosen the chuck.A 1/4 inch chuck key will work as well.If this is a key less chuck then use a small pipe wrench and hammer on the back part of the chuck with the handle left as you look at the drill.Good Luck & Thank You for choosing FixYa.com.

If your Makita matches the one on the picture, you will need a chuck key to attach a drill bit or tool to the machine's chuck. The chuck key inserts to any of the small holes in the front part of the chuck and at the same time its teeth interlocks with the teeth of the chuck. When turning the chuck key you will widen or loosen the grip of the three jaw pieces, that clamps to your tool or bit. Tighten the chuck key by hand until the chuck grips the bit securely. For safety, unplug the power cord whenever operating the chuck key on the chuck.

Hello. Wrap a towel around the chuck and use a pipe wrench or a pair of channel locks to put a little force on the chuck. J.

Use of both is the same:
- loosen "chuck" (part where bit is installed).
- insert bit (hand tighen chuck so that bit is secured)
- tighten chuck securely with chuck tool, or by holding rotating chuck with hand and pulling trigger (GENTLY or you will shave off skin!)
- put drill in forward or reverse mode and pull trigger to inser or remove screw / drill hole.

ensure that battery is charged on cordless drilll.
squeeze connectors to remove and place in charger when battery is too low to operate drill.

If there is a chuck bolt in the center (where the bit goes) remove it (left hand thread). The chuck is threaded onto the splindle(right hand thread). On some of those drills they have a small hole in the housing that lines up with a hole in the spindle. Put a pin punch in to lock the shaft so you can unthread the chuck. If you clamp a 3/8" allen wrench in the chuck it acts as a good handle. If there are no holes to lock the chuck, if you lay the drill on a bench and give the allen wrench a sharp blow with a rubber mallet it will unthread the chuck. If the chuck is damaged and will not hold an allen key you will have to cut the spindle off and replace the chuck and spindle.

Hope that helps

This drill has a keyless chuck. Put your bit in the chuck and hold the collar of the chuck while pressing the trigger in the forward position. To undo the chuck do this in reverse. You can also hand tighten the keyless chuck if you prefer. I have a 1/4' adapter that I keep in my drill so I can change bits quickly.

If it's an inexpensive bit, odds are it's spinning in the chuck. If the chuck key can't tighten the jaws well enough, you'll need to borrow or buy a different drill (or you could replace the chuck).

If you bought an SDS bit (one with slots milled in the shank), you're best off buying a bit made for a standard drill. It's not impossible to get a SDS bit to chuck into a standard drill, but it's difficult and they often slip loose during drilling, messing up the hole.


Take care!