How to Put a Bit in an Impact Driver
Loading a bit takes two seconds once you know which kind of collet your driver has and which kind of bit it will actually hold. Here is how to do it, how to get the bit back out, and what to check when it will not lock.
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To put a bit in an impact driver, set the direction switch to the center lock, pull the collet sleeve forward (or just push the bit in on a one-handed collet), insert a 1/4-inch hex power bit until it clicks, and tug it to confirm it is locked. To change the bit, pull the sleeve forward and slide the bit out. Short 1-inch insert bits need a bit holder on most drivers.
On this page
How to put a bit in an impact driver: the short version
Every mainstream cordless impact driver uses the same 1/4-inch hex quick-change collet. You do not tighten anything. The collet grabs a groove on the bit shank with spring-loaded balls or a detent and holds it until you pull the sleeve. Learn the three steps once and they work on Milwaukee, DeWalt, Makita, Ryobi and nearly everything else.
- Lock the trigger. Push the forward/reverse switch to the center position so the tool cannot spin while your fingers are near the bit.
- Open the collet. Pull the sleeve at the front of the tool forward, toward the tip. On a one-handed (push-in) collet, skip this step.
- Insert the bit. Slide the hex shank in until it bottoms out, release the sleeve and listen or feel for the click.
- Tug the bit. A locked bit does not pull out. If it slides out, it is not locked or it has no groove.
That is the whole job. The rest of this page covers the details that cause trouble: collet styles, which bits lock, and what to do when a bit will not go in or come out. For what to do once the bit is in, see how to use an impact driver.
Know your collet type
Impact drivers use a few variations on the same hex collet. Your manual names yours, and impact driver chucks and hex collets covers them in depth.
| Collet style | To insert | To remove | Found on |
|---|---|---|---|
| Pull-forward sleeve | Pull sleeve forward, insert, release | Pull sleeve forward, slide out | Most current drivers |
| One-handed (drop-in) collet | Push the bit straight in until it clicks | Pull sleeve forward, slide out | Many current pro and mid-range models |
| Pull-back sleeve | Pull sleeve toward the body, insert, release | Pull sleeve back, slide out | Some older and budget tools |
Brand notes
- DeWalt: DeWalt describes the DCF887's 1/4-inch hex chuck as one-handed loading and able to accept 1-inch bit tips. Check your model's manual before relying on that, because not every DeWalt driver lists it.
- Milwaukee, Makita and Ryobi: current models use a forward-pulling sleeve, and many accept a power bit pushed straight in. The release is always by pulling the sleeve forward.
- Older or bargain tools: if the sleeve will not move forward, try pulling it back. Never twist or pry it.
Which bits lock and which do not
The collet locks onto a groove near the end of the hex shank. Whether a bit has that groove decides everything.
| Bit type | Locks in the collet? | What to do |
|---|---|---|
| 2-inch and longer power bits | Yes (ball groove) | Insert directly |
| 1-inch insert bits | Usually no | Use a bit holder (some chucks accept them) |
| Magnetic or locking bit holders | Yes | Insert the holder, then the insert bit |
| Hex-to-square socket adapters | Yes | Insert like a power bit |
| Hex-shank drill and spade bits | Most do | Check for a groove before use |
| Round-shank drill bits | No, will not fit | Use a drill |
A good magnetic bit holder turns cheap 1-inch insert bits into a usable setup and holds the screw on the tip too. Always pick impact-rated bits; standard bits snap under hammering. See impact driver bits for what to buy.
Impact bit holders on Amazon Impact-rated bit sets
How to change a bit on an impact driver
- Set the direction switch to center so the trigger is locked.
- Let a just-used bit cool for a minute. Bits and holders get hot after long screws or drilling.
- Pull the collet sleeve forward and hold it.
- Slide the bit straight out. Do not wiggle it side to side, which wears the collet.
- Insert the new bit, release the sleeve and tug-test it.
If you use a bit holder, you often only change the insert bit in the holder and leave the holder in the tool. That is faster and saves wear on the collet.
When the bit will not go in
- Sleeve not fully open. Pull it all the way forward and hold it while inserting.
- Burr or mushroomed shank. Bits that have been hammered or dropped can swell at the end. File the burr off or replace the bit.
- Debris in the collet. Sawdust, drywall dust and metal chips pack the hex socket. Blow it out with compressed air and work the sleeve a few times.
- Wrong shank. Metric or 5/16-inch hex, round shanks and SDS bits do not fit a 1/4-inch hex collet.
- Bit not aligned with the hex. Rotate it slightly until the flats line up, then push.
When the bit will not lock or will not come out
Bit falls out or pulls loose
The usual cause is a bit with no groove, typically a 1-inch insert bit in a collet that does not accept them. Use a holder. If grooved power bits also fall out, the locking balls or spring may be worn or packed with dirt. Clean it first. If that fails, the collet is a wear part; a service center can replace it, and it is often covered if the tool is still under warranty.
Bit stuck in the collet
Stuck bits usually come from a broken tip wedged inside, a mushroomed shank, or rust and dust. Lock the trigger, pull the sleeve fully forward, and grip the bit with locking pliers while you pull straight out. A drop of penetrating oil and a few taps on the sleeve can help. Never hammer on the bit tip or pry against the nose of the tool. Full steps are in bit stuck in an impact driver.
Bit wobbles
Some play is normal in a hex collet, but visible runout that makes screws hard to start points to a bent bit, a worn holder or a worn collet. Swap the bit first; it is the cheapest fix. More in impact driver bit wobble.
Mistakes to avoid
| Mistake | Result | Fix |
|---|---|---|
| Changing bits with the trigger unlocked | Bit spins into your fingers | Switch to center first |
| Grabbing a bit right after a long drive | Burned fingertips | Let it cool or use a glove |
| Using non-impact bits | Snapped tips, stuck pieces | Impact-rated bits only |
| Long extension for a short reach | Wobble and cam-out | Shortest bit that reaches |
| Prying a stuck bit sideways | Damaged collet | Pull straight with pliers |
Safety: Always lock the trigger before touching the bit, and wear eye protection when driving. A bit that is not fully locked can fly out when the hammer engages.
Frequently asked questions
Can you put a regular drill bit in an impact driver?
Only if it has a 1/4-inch hex shank with a locking groove. Round-shank drill bits will not fit the hex collet at all. Hex-shank twist bits, spade bits and step bits made for impact drivers work for light drilling.
Why does my impact driver bit keep falling out?
Usually the bit has no power groove, so the collet balls have nothing to grab. A 1-inch insert bit is the usual culprit. Put it in a bit holder or switch to 2-inch power bits. A worn collet can also cause it.
Do impact drivers need a key like an old drill chuck?
No. Impact drivers use a keyless 1/4-inch hex quick-change collet. There is no key and nothing to tighten. The bit locks with spring-loaded balls or a detent.
Which way do you pull the collar on an impact driver?
On most models you pull the collet sleeve forward, toward the bit end, to release it. A few older or budget tools pull back toward the body. If it does not move one way, try the other without forcing it.
Can I use a socket in an impact driver?
Yes, with an impact-rated hex-to-square adapter or hex-shank sockets. Load the adapter exactly like a power bit, then press the socket onto the square end.