How to remove a broken drill bit, by situation and material

A drill bit snaps, and a piece of hardened steel is now wedged in your workpiece. The removal method is decided by two things and only two things: how much of the bit is exposed (proud of the surface, flush, or below it) and what material is holding it (wood, metal, or masonry) ^{[1] [6]}. A third case, the bit broken off inside the chuck itself, is a chuck problem rather than a workpiece problem ^{[8] [20]}. This page walks every combination, from locking pliers on a proud shank down to the glued-dowel-and-redrill fallback, then covers why bits break so the next one does not. Sizing of the extractors themselves is a separate question, owned by our bolt and screw extractor size chart.

First, triage: stop, look, and do not make it worse

Stop drilling the moment the bit breaks. Continuing to run the drill can heat and wedge the stub tighter, or snap it again deeper ^{[5] [9]}. Then answer three questions before touching a tool. One: how much is sticking out? Even a few millimeters of exposed shank is a grip point and changes everything ^{[1] [5]}. Two: what is it stuck in? The same flush break is a five-minute fix in softwood and a grinder job in concrete ^{[7] [11]}. Three: can you reach the back side? A through-hole you can access from behind is often solved by pushing the stub out from the other side rather than pulling it out from the front ^{[2] [21]}. Work with the drill unplugged or the battery out whenever your hands are in the chuck ^{[6] [20]}, and wear eye protection: the stub edges are sharp and small fragments fly ^{[3] [6]}.

The method-by-situation matrix

Every row of this table is the consensus of at least two independent guides; the sections after it expand each method.

Method 1: locking pliers on the exposed shank

This is the winner whenever anything is proud of the surface, and it works in every material ^{[1] [3]}. Clean any oil or gunk off the stub first so the jaws bite rather than slip ^{[3] [4]}. Clamp locking pliers (Vise-Grips) perpendicular to the stub, as close to the surface as you can get, and rotate counterclockwise, slow and steady. The direction matters: twist bit flutes spiral clockwise, so turning the stub backward threads it out of the hole the same way a screw comes out ^{[1] [3]}. In metal, give penetrating oil 10 to 15 minutes to wick into the hole before you apply torque ^{[5] [12]}. If the pliers slip, stop and re-clamp rather than rounding the stub; a rounded stub removes most of your remaining options ^{[5] [19]}.

Two variants belong here. If enough shank is exposed, rechuck the stub itself, tighten hard, set the drill to reverse, and back it out at low speed ^{[1] [10]}. And in resin-rich wood, gentle indirect heat around the hole (30 seconds, heat gun not torch-contact) softens the resin and releases the grip ^{[2] [5]}.

Method 2: center punch and tap, for flush breaks

Nothing to grip does not mean nothing to lever. The flutes of a twist bit are spiral ledges, and a punch can walk them backward. Set the tip of a small center punch against a flute at the exposed end, angled so the blow will rotate the stub counterclockwise, and tap with a small hammer. Alternate between flutes so the stub turns evenly, and with patience it threads itself back out ^{[1] [6]}. This works best on larger diameters, where the flutes are wide enough to catch the punch tip ^{[1] [22]}. If the broken end is jagged, dress it first: a chisel or file taken to the fracture face gives you a flatter, more predictable surface to punch against ^{[6] [9]}. On very shallow breaks in wood, some guides report shattering a small brittle stub in place with a sharp punch and picking out the fragments, but treat that as a last resort because the surrounding wood pays for it ^{[1] [6]}.

Two related tricks for stubs that are only just below the surface: needle-nose pliers lowered into the hole can catch the flutes directly ^{[1] [4]}, and in shallow wood breaks you can fill the hole with epoxy, push in a thin steel rod, let it cure overnight, and twist the whole assembly counterclockwise the next day ^{[2] [19]}.

Method 3: the screw extractor, one section only

For flush and deep breaks in metal and hardwood, the screw extractor (easy-out) is the purpose-built answer, and the process is consistent across every guide we checked. Dress the broken end flat, center punch it dead center, drill a shallow pilot hole with a bit smaller than the extractor and harder than the broken piece (cobalt or carbide for a hardened steel bit; an ordinary HSS bit will skate off it), add cutting fluid, then insert the tapered left-thread extractor and turn counterclockwise so it bites and walks the stub out ^{[3] [6] [7]}. Keep the pilot shallow, in the 1/8 to 1/4 inch range: drill too deep and you can crack the stub, which makes things worse ^{[3] [22]}. Centering is the hard part; a punch divot stops the pilot bit walking off the hardened face, and low RPM keeps the cobalt bit from burning ^{[7] [22]}. Which extractor number fits which stub diameter is a chart question, not a technique question: see our bolt and screw extractor size chart for the size mapping by extractor type and brand.

Method 4: drill around it, then plug the hole (wood)

When the stub is deep in wood and the hole position is negotiable, stop fighting the steel and remove the wood instead. A hole saw sized just over the stub diameter, centered on it, cuts a clean cylinder of wood that comes out with the bit inside it ^{[2] [7]}. Purpose-built hollow screw extractors do the same job more surgically: tube-shaped saws that bore around the broken piece, sized by diameter (a 1/4 inch extractor suits screws up to a #8 and similarly sized bits) and run in a drill press or a guide block to stay square ^{[1] [7]}. The repair after either is the same and it is standard woodworking: glue a matching dowel into the hole, trim flush, and redrill the hole where it actually belongs ^{[1] [2]}. If appearance matters, our hole saw size chart covers plug and dowel sizing context, and the pilot hole chart sizes the redrill.

Method 5: drill it out or through it

Drilling out means attacking the stub itself with a larger bit. In wood, a bit slightly larger than the stub, centered over it, removes the whole problem and leaves a pluggable hole; the risk is wandering off the hardened steel, so go slowly, preferably in a drill press ^{[1] [7]}. In metal, drilling out only works with a cutting tool harder than the broken bit: cobalt or solid carbide, low RPM, cutting fluid, starting small and stepping up ^{[6] [7]}. Machinists with access to a mill reduce a stubborn stub to chips with a carbide end mill, which needs rigid setup or the carbide itself shatters ^{[15] [21]}.

Drilling from the opposite side is the gentler sibling, and it is the first thing to check whenever the hole is open at the back. Drill carefully from the back face along the same axis; the new bit meets the stub and pushes it out the front ^{[2] [21]}. For holes in walls, opening the cavity from the other side and pushing the stub back the way it came is often cleaner than any extractor gymnastics from the front ^{[2] [10]}.

Metal specifics: steel, stainless, aluminum

In steel and stainless, heat is a tool and a trap. Gentle heat of the workpiece around the stub (not the stub itself) expands the surrounding metal and can break the grip; in aluminum, keep heat modest because the workpiece itself distorts at temperatures a torch reaches casually ^{[13] [5]}. For a stub that laughs at extractors, the machinist's fallback is welding a nut onto the broken end: the weld gives you a wrench purchase, and the weld heat cycle shocks the seized joint loose ^{[21] [15]}.

Aluminum workpieces get a dedicated trick because the chemistry cooperates. Alum, the grocery-store pickling spice (potassium aluminum sulfate), in a saturated hot-water bath dissolves hardened steel while leaving the aluminum workpiece essentially untouched; a broken HSS stub an inch deep in an aluminum block was reported fully dissolved in one documented workshop run, and machinist forums confirm the method for taps as well as bits ^{[14] [15]}. It is slow (hours, refreshed hot solution, works faster uncoated than TiN-coated) but it is the only method that removes the steel with zero risk to the part ^{[14] [16]}. Test on scrap first and mask surrounding surfaces; forums note the solution can lightly etch or stain some finishes ^{[15] [16]}. Choosing the right bit and lubricant before you drill aluminum again is covered in drill bits by material.

Wall and masonry specifics

In brick, block, and concrete, the usual reason a bit is stuck is packed dust: masonry cuttings that cannot exit the hole compact around the flutes and lock the bit in place ^{[10] [11]}. So step one for a protruding stub is to clear what dust you can, then work the locking pliers counterclockwise ^{[9] [10]}. If the stub is flush or below the surface, be realistic about the physics: the tip of a masonry bit is carbide, extractor pilot bits are steel, and steel does not drill carbide. The practical routes are grinding or diamond-drilling the masonry away from around the stub, or abandoning it: many guides note that a broken masonry stub can be left in place, the hole patched with anchor epoxy, and a new hole drilled nearby ^{[9] [11] [12]}. Anchors for the replacement hole are sized in our concrete anchor bit size chart. Prevention here is pecking: withdraw the bit every few seconds to let dust out, which is the same habit that prevents heat and jamming in every other material ^{[10] [18]}.

When the bit is broken off in the chuck

A stub seized inside the chuck is a different problem: the workpiece is your drill. Open the jaws fully; short stubs sometimes just drop out once the jaws clear ^{[8] [20]}. If the flutes have bitten into the jaw faces, work two directions at once: grip the protruding stub in a vise or locking pliers, hold the drill body, and unwind the chuck with its key (keyed chuck) or a strap wrench on the collar (keyless) ^{[8] [12]}. Avoid toothed metal pliers directly on a keyless chuck shell: they dent the collar and the chuck stops closing true afterward ^{[12] [20]}. Penetrating oil in the jaw channels, given ten minutes, frees jaws that self-tightened during a hard drilling session; running the drill in reverse while holding the collar is the no-tools first attempt ^{[12] [20]}. Chuck sizes and types are covered in our drill chuck sizes guide, and the full release ladder for a bit seized in a chuck that is not broken, keyless, keyed, or SDS, is our drill bit stuck in the chuck guide.

The fallback: leave it, fill it, redrill

Not every broken bit has to come out. If the hole is not structural, not visible, and not going to be machined or cut through later, the cheapest repair is to leave the steel where it is, fill the hole (epoxy bonds to both wood and metal better than wood glue does), and drill a fresh hole a modest distance away ^{[1] [2]}. Woodworking guides even make a virtue of it: a buried stub left in a fence post or outdoor joist behaves like a bit of rebar ^{[2] [21]}. The one rule that matters: mark or remember where the steel is, so nobody tries to saw or drill through it later ^{[2] [1]}.

Why drill bits break (and how to stop feeding the scrap bin)

Removal is the cure; these are the causes worth knowing.

Heat destroys the temper. A drill bit's hardness is a heat treatment, and it is not forever. Overheated steel loses its temper and snaps where it used to cut; the color of the bit is a temperature record, with straw yellow around 200 to 250 degrees Celsius harmless, dark brown a warning, and blue or purple (300 degrees and up) meaning the hardness is going or gone ^{[17] [19]}. Heat comes from dull edges rubbing instead of cutting, excessive speed, and drilling without breaks ^{[17] [18]}. If a bit is smoking or the shank colors, the fix is speed, feed, and lubricant, not pushing harder ^{[17] [19]}. Correct speeds by diameter and material are in our drill speed chart, and a bit that has already discolored can often be reground: see drill bit sharpening.

Chips pack in deep holes. Chips that cannot exit the flutes are re-cut, compact, heat the bit, and finally jam it; in deep holes this is the classic sudden-snap mechanism, and it is silent until the failure ^{[17] [18]}. The cure is pecking: drill a hole-depth's worth, retract fully to clear the flutes, re-enter, and repeat, with lubricant in metal ^{[1] [18]}. Long stringy chips are the warning sign; ideally chips come out as small curls, and in metal, feed changes chip shape as much as speed does ^{[18] [17]}.

Small diameters break most. The smaller the bit, the less bending it survives. Anything under 1/8 inch tolerates almost no side load before fracturing, which is why the tiniest bits in a set die first ^{[1] [19]}. Small bits also hide runout and chuck wobble: a drill whose chuck runs off-center whips small bits to death. Acceptable general-drilling runout is under 0.005 inch; check with a dial indicator if small bits keep breaking for no visible reason ^{[18] [19]}.

Walking starts the hole crooked. A bit that walks across the surface before biting starts a hole that is oval, angled, or off-layout, and the corrections (tilting the drill to fix it) are exactly the side loading that snaps small bits ^{[1] [17]}. A center punch dimple, a pilot hole, or a split-point bit (135-degree split points are specifically marketed as walk-resistant) starts the cut where you put it ^{[19] [17]}. Pilot sizing by screw gauge is our pilot hole chart; if you were tapping when the bit broke, the tap drill chart will confirm you had the right bit in the first place.

Dull and wrong bits finish the job. A dull bit needs several times the force to cut, and the extra force becomes heat, wander, and breakage; fine dust instead of curls in hardwood is the tell ^{[1] [17]}. And a bit matched to the wrong material (HSS hammered into masonry, a masonry bit twisted in steel) fails by design; the drill bits by material guide maps bit types to jobs ^{[19] [17]}.

Related

For extractor sizes by stub diameter: bolt and screw extractor size chart. For the hole saw used in the drill-around method: hole saw size chart. For making an existing hole larger instead of clearing it: how to enlarge an existing hole. For redrilling after a plug repair: pilot hole chart and tap drill chart. Fiberglass is especially hard on small bits; preventing the break in the first place is covered in how to drill into fiberglass. For the bits and speeds that prevent the next break: drill bits by material, drill speed chart, and drill bit sharpening. For the stuck-chuck case: drill bit stuck in the chuck and drill chuck sizes. For replacing anchors in masonry: concrete anchor bit size chart.

Sources

1. ScienceInsights, How to Remove a Broken Drill Bit From Wood: locking pliers counterclockwise on exposed shank (flutes act as screw threads), rechucking in reverse, center punch against flutes alternating counterclockwise, hollow tube extractors (1/4 inch suits up to #8 screws), drill-around with larger bit and dowel plug, glued-dowel redrill fallback with epoxy over wood glue, pecking and under-1/8-inch side-load breakage, overheating losing temper (scienceinsights.org/how-to-remove-a-broken-drill-bit-from-wood)
2. ThePlywood.com, Drill Bit Stuck in Wood: reverse pulsing, locking pliers with shim, heat for resin-rich wood, hole saw extraction with dowel plug, screw extractor steps, epoxy-rod glue trick for shallow breaks, leave-it-as-rebar option, access from other side of wall, mark the steel location (theplywood.com/drill-bit-stuck-in-wood)
3. SawsHub, How to Remove a Broken Drill Bit: clean oil off before gripping, locking pliers counterclockwise using flute spiral, screw extractor with left-hand-bit context, pilot hole depth limited to 1/8 to 1/4 inch to avoid cracking the stub, cutting/tapping fluid, safety goggles (sawshub.com/how-to-remove-broken-drill-bit)
4. Capische, How To Remove Broken Drill Bit from Metal: cleaning lubricant and dirt off the stub before pliers, extractor process with flat end, guide hole 1/4 inch min description, wrench counterclockwise, break causes (wrong bit, unsecured workpiece, poor chip removal, flexing) (capische.com/how-to-remove-broken-drill-bit-from-metal)
5. Daily Hand Tools, How to Get a Broken Drill Bit Out: protruding vs flush vs deeply-lodged break taxonomy, penetrating oil soak before gripping, pilot hole requirement for extractors, stop-immediately rationale, re-clamp rather than round the stub (dailyhandtools.com/how-to-get-a-broken-drill-bit-out)
6. wikiHow, How to Remove a Broken Drill Bit: locking pliers counterclockwise when the end is visible, chisel jagged edges flat, center punch divot, bore into the broken bit and use a tap extractor, eye protection and secure-fitting glasses (wikihow.com/Remove-a-Broken-Drill-Bit)
7. Engineer Fix, How to Get a Broken Drill Bit Out of a Hole: break-severity assessment by exposure and material, screw extractor with carbide-tipped pilot bit into the broken cross-section, drill-around with larger bit in soft material to release compressive grip (engineerfix.com/how-to-get-a-broken-drill-bit-out-of-a-hole)
8. A Butterfly House (NoMoreBasic), How to Remove a Stuck Drill Bit From Almost Anything: channel-lock pliers on the chuck body, vise plus pliers for seized bits, directing force at the chuck vs the bit for material cases, clamping near the surface vs on the smooth shank (abutterflyhouse.com/remove-stuck-drill-bit-from-anything/)
9. ShunTool, Extracting Drill Bits From Concrete: pliers counterclockwise, screw extractor after flattening jagged edges, stop drilling immediately, lubricant around the bit, cut-and-epoxy abandon option (shuntool.com/article/how-to-get-a-drill-bit-out-of-concrete)
10. Engineer Fix, How to Remove a Broken Drill Bit From a Wall: swarf/dust packing as the binding cause, pecking prevention, reverse-and-pull with the drill, locking pliers parallel to the wall, masonry speed and heat cautions (engineerfix.com/how-to-remove-a-broken-drill-bit-from-a-wall)
11. Homesteady, How to Remove a Drill Bit From a Concrete Hole: failure to let concrete dust exit causes binding and breakage, removal split by above-surface vs below-surface breaks (homesteady.com/13415217/how-to-remove-a-drill-bit-from-a-concrete-hole)
12. Power Tools Today, How to Remove a Stuck Drill Bit: reverse-direction release for self-tightened keyless chucks, penetrating oil in jaw channels 10 to 15 min, strap wrench not metal pliers on chuck shells, masonry caveat that extractor kits cannot drill carbide so a diamond bit removes surrounding material instead (powertoolstoday.com/how-to-remove-stuck-drill-bit/)
13. ToolsAdvisers, How to Remove Broken Drill Bit from Aluminum: aluminum softness embedding bits, pilot-hole and easy-out process, cautious heat around (not on) the stub due to aluminum distortion risk, Dremel grind-out last resort (toolsadvisers.com/how-to-remove-broken-drill-bit-from-aluminum/)
14. Hobby-Machinist forum thread, Dissolving broken bits with Alum: documented full dissolution of a broken bit embedded 1 inch deep in an aluminum block using saturated potassium aluminum sulfate in hot water; slower on TiN-coated bits; keys are saturation, heat, and time; block left with intact hole (hobby-machinist.com/threads/dissolving-broken-bits-with-alum-it-does-work.105972/)
15. Practical Machinist forum threads on broken tap/bit removal: alum (potassium or ammonium aluminum sulfate) dissolves steel in non-ferrous workpieces while aluminum's oxide layer protects the workpiece; test on scrap and contain the solution; carbide end mill reduces stubs to chips but needs rigid setup; weld-a-nut heat-shock method (practicalmachinist.com/forum/threads/broken-tap-removal-by-chemical-methods.198135/ and /removing-broken-hss-tap-with-alum-anodizing-question.360592/)
16. Engineer Fix, How to Remove a Broken Tap From a Workpiece: alum (potassium aluminum sulfate) in boiling water dissolves high-carbon steel tap/bit material over hours to days without harming non-ferrous workpieces (engineerfix.com/how-to-remove-a-broken-tap-from-a-workpiece/)
17. Zhonghuan Tools, Drill Bit Overheating: color-as-temperature record (straw 200 to 250 C, dark brown warning, purple-blue 300 to 350 C softening), dull edges multiplying force and heat 3 to 4x, chip clogging and pecking intervals, pressure causing deflection and wandering, material-specific speed and lubricant tables (zhonghuantools.com/en/resources/drill-bit-overheating-solutions)
18. True Tooling, Why Drill Bits Break: chip packing mechanics in deep holes, stringy aluminum/stainless chips, peck interval 1 to 2x drill diameter with full retraction, runout under 0.005 inch general / 0.002 precision, warning signs table, troubleshooting by symptom (truetooling.com.au/blogs/technical-resources/why-drill-bits-break-10-common-causes-and-how-to-prevent-them)
19. PowerToolsInsider, Why Drill Bits Break: overheating breaking down temper, speed/pressure/dullness causes, split-point 135-degree bits as walk-resistant, blue/purple discoloration as failure sign (powertoolsinsider.com/why-drill-bits-break-solutions/)
20. ToolsAdvisers, How To Remove Drill Bit Stuck In Chuck: over-tightening and debris as causes, lubricant soak then wrench/pliers on chuck, gentle mallet taps, heat via hair dryer, extractor tools, unplug-first safety (toolsadvisers.com/how-to-remove-drill-bit-stuck-in-chuck/)
21. RC Truck and Construction forum, broken bits thread: drill from the other side and the broken bit pushes out if done carefully; heat the steel part to expand it off a carbide stub and tap the workpiece upside down; weld-a-nut for broken bits in steel; lye dissolves aluminum jammed in a steel tap, the inverse of the alum trick (rctruckandconstruction.com/archive/index.php/t-897.html)
22. GoalGuide, How to Remove a Broken Drill Bit: extractor number-to-drill-diameter mapping context, center punch divot preventing pilot-bit walking, low RPM with firm pressure for the cobalt pilot (goalguide.blog/how-to-remove-broken-drill-bit)