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Drill speed affects more than how quickly a hole gets made. Too much speed can burn a bit, melt plastic, or make a fastener hard to control. Too little can make drilling slow and rough. The right setting depends on the material, bit diameter, and whether you are drilling or driving.
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What the speed settings mean
Most cordless drills have a two-speed gearbox and a variable-speed trigger. Low gear gives more torque and better control; high gear spins faster but has less turning force. The gear switch is not a fine speed control: use the trigger to adjust speed within the selected range. Check the drill manual for its actual ranges, since they vary.
As a starting point, use low gear for large bits, tough materials, and driving screws. Use high gear for small bits in wood or metal when the tool and bit allow it. Start slowly to keep the bit from wandering, then increase speed once it has a stable bite. If the bit stalls, do not keep squeezing the trigger; back it out, clear the chips, and reduce speed or pressure.
Starting speed by material
The figures below are approximate revolutions per minute (RPM) for ordinary drilling. They are starting points, not universal limits. Bit maker guidance takes priority, especially for large bits, specialty cutters, and hole saws. Many cordless drills do not display RPM, so use the numbers to understand which gear and trigger range to choose.
| Material and bit | Useful starting range | Practical approach |
|---|---|---|
| Softwood, small twist bit (up to 1/4 in.) | 1,500–3,000 RPM | Use high gear; ease off near the back face to limit splintering. |
| Hardwood, small twist bit | 1,000–2,000 RPM | Start slower than in softwood and clear chips from deeper holes. |
| Wood, large bit or hole saw | 300–1,000 RPM | Use low gear and firm control; high speed can overheat the cutter. |
| Aluminum, small twist bit | 500–1,500 RPM | Use cutting fluid when appropriate and clear chips often. |
| Steel, small twist bit | 300–1,000 RPM | Use low gear, steady pressure, and cutting oil; avoid letting the bit rub. |
| Plastic, small twist bit | 300–1,000 RPM | Use light pressure and a sharp bit; high speed can melt or crack the work. |
| Brick or concrete, masonry bit | About 500–1,500 RPM | Use hammer mode only when the drill and bit are designed for it. |
Wood: match speed to bit size
Small bits can run quickly in wood, but larger cutters need slower rotation. A 1/8-inch pilot hole in softwood can usually be drilled in high gear. A 1-inch spade bit or hole saw should be run more slowly, typically in low gear, because its wider cutting edge creates more heat and torque. If the drill twists in your hands or the bit grabs, stop and change to low gear rather than forcing it.
For cleaner holes, clamp the work and place scrap wood behind it to reduce tear-out as the bit exits. For screws, use low gear and a clutch setting that stops the drill before the head strips or the screw sinks too far. A basic two-speed cordless drill driver is enough for most household wood drilling and fastening; a premium model is not essential if you only use it occasionally.
Metal: slower, steady, and sharp
Metal drilling usually calls for lower speed than wood, particularly with larger bits. A high-speed bit in steel can turn blue from heat and lose its edge. Use a sharp bit rated for the metal, clamp the work, and apply steady pressure. If you hear squealing, see discoloration, or get fine dust instead of curls, stop: the bit may be rubbing, dull, or too fast. Add suitable cutting fluid for steel; aluminum often benefits from lubricant too, though some small jobs can be done dry.
When drilling thin sheet metal, start with a center punch to prevent the bit skating. Reduce pressure as the bit breaks through so it does not catch and spin the sheet. For large holes, drill a smaller pilot hole first and use low gear. A drill press offers better control for repeated metal work, but a hand drill is adequate for occasional holes when the piece is secured.
Plastic and masonry need different cues
Plastic can soften from friction before the hole is complete. Start slow, use a sharp bit, and keep pressure light. If plastic curls melt onto the bit, stop and let the work cool before continuing. Backing the piece with scrap reduces cracking on exit. For brittle plastic, a pilot hole and a gradual increase in size are safer than forcing a large bit through at speed.
For brick or concrete, use a masonry bit and a hammer drill when the material and task call for impact. Hammer action is not a speed substitute: use controlled rotation and let the tool work without excessive force. A standard drill may manage small holes in soft brick, but it can bog down on concrete. For a few small anchor holes in masonry, a cordless hammer drill is useful; if you rarely drill masonry, renting or borrowing one may cost less than buying it.
Driving screws and anchors
For screws, choose low gear and start with a gentle trigger pull. Set the clutch so it slips before the screw head strips, then raise the setting only as needed. Use a pilot hole in hardwood or near board edges to reduce splitting. For plastic wall anchors, drill the hole at the diameter printed on the package, keep the drill square, and avoid enlarging it with side-to-side movement. A loose hole can leave the anchor spinning instead of gripping.
Impact drivers are designed to deliver short bursts of torque and can drive long screws efficiently, but they are easier to overdrive small screws or damage soft material. Use a low-speed control setting if available and stop as the head seats. For delicate assembly or small fasteners, a drill driver with a clutch is often easier to control.
Adjust as you work
Speed charts cannot account for every bit, battery, or material condition. Begin with a slower setting, watch the cut, and increase speed only if the bit is cutting cleanly without excess heat or vibration. If the drill slows sharply, the motor smells hot, the bit binds, or the material burns, stop and reassess. A slower gear, sharper bit, smaller pilot hole, or better chip clearance often solves the problem more safely than pressing harder.