SDS Drill Bits: Choosing the Right Type for the Job

The quality of any drilling result depends as much on the bit as on the tool driving it. With SDS drills, bit selection plays a central role in determining efficiency, hole quality, and overall safety. Choosing the wrong bit for a given material can slow progress, damage surfaces, or create hazardous working conditions. Understanding bit types is a practical skill that SDS drills users at every level should develop early in their experience with the tool.
What Types of Bits Are Compatible with SDS Drills?
SDS-compatible bits fall into several functional categories, each suited to a specific range of tasks.
Carbide-tipped masonry bits are the most common choice for drilling into concrete, brick, and stone. The carbide tip withstands the repeated impact of the hammering action and maintains a sharp cutting edge through hard aggregate. These bits are available in a wide range of diameters to suit anchor bolts, pipe fittings, and cable runs.
Flat chisels and pointed chisels are used when the drill is set to hammer-only mode. Flat chisels are ideal for removing tiles or breaking surface layers, while pointed chisels concentrate force on a smaller area for breaking through dense material or driving into tight spots.
Core bits are hollow cylindrical cutters used for creating large-diameter holes — typically for pipework, electrical conduit, or ventilation shafts. These require a slower approach and, on larger diameters, may call for a more powerful SDS-Max drill.
Multi-purpose bits are engineered to work across concrete, masonry, and some softer materials without switching bits mid-task. While convenient, they tend to perform best on lighter applications rather than sustained heavy-duty drilling.
How Do You Select the Right Bit Diameter?
Bit diameter should match the specification of the fixing, anchor, or cable being installed. Most product manufacturers specify the required hole diameter clearly, and following that guidance ensures a secure fit. Drilling oversized holes weakens the fixing point, while undersized holes create unnecessary resistance and risk damaging both the bit and the surrounding material.
For clean, precise results — particularly in finished or decorative surfaces — using a depth-stop attachment prevents over-drilling and keeps hole depth consistent across multiple fixings.
How Long Should SDS Drill Bits Last?
Bit lifespan varies based on the hardness of the material being drilled, the frequency of use, and how well the bits are maintained. Carbide-tipped bits used frequently on reinforced concrete will wear faster than those used occasionally on brick or block.
Signs of a worn bit include slower drilling progress, increased heat generation, and a tendency for the bit to wander at the start of a hole. Replacing worn bits promptly not only improves efficiency but also reduces the risk of the bit snapping under load.
Storing bits in a dedicated case or roll protects the cutting edges from contact damage and keeps them organized for quick selection on site.