Drilling into brick is a common task for hanging shelves, mounting outdoor fixtures, or installing anchors for heavier loads. While brick looks similar to concrete or stone, it behaves differently when drilled, and using the wrong drill bit can lead to cracked masonry or burned-out tools.
This guide explains which drill bit works for brick, why that bit is used, and how material conditions affect your choice. It also covers common mistakes and practical details that help most DIY users get clean, accurate holes without damaging the brick.
Quick Answer
For drilling into brick, a masonry drill bit is the correct choice for most DIY projects. Masonry bits are designed with a hardened carbide tip that can grind through brick without dulling quickly or overheating. They are typically used with a hammer drill, but they also work with a standard drill at slower speeds.
This rule can change in a few situations. Very soft or old brick may drill more cleanly without hammer action, using steady pressure instead. Decorative brick veneers or thin brick tiles may also require a lighter approach to avoid cracking or chipping the surface.
How Drill Bit Size Works
Drill bit size refers to the diameter of the hole the bit creates, usually measured in inches or millimeters. When drilling into brick, the bit size is typically chosen based on the anchor or fastener being installed, not the screw itself. In practice, the hole must match the anchor’s outer diameter so the anchor fits snugly.
Masonry bits are sized the same way as wood or metal bits, but they cut differently. Instead of slicing material away, the carbide tip pulverizes the brick as it rotates. Because of this, masonry bits tend to produce slightly rougher holes, which actually helps anchors grip securely inside the brick.
For most wall-mounted hardware, common sizes range from 3/16 inch to 3/8 inch. Larger bits require more torque and control, especially in harder brick. A common approach is to start with the exact size recommended by the anchor manufacturer rather than guessing or drilling oversized holes.
Best Drill Bit Type for This Job
Masonry drill bits are specifically designed for brick, block, mortar, and concrete. They feature a blunt, chisel-shaped carbide tip bonded to a steel shaft. This tip resists heat and abrasion, allowing it to grind through hard masonry without losing its edge quickly.
Standard twist bits made for wood or metal should not be used on brick. These bits rely on sharp cutting edges, which dull almost immediately when they contact masonry. In many cases, they will overheat, wander off-center, or fail to penetrate the surface at all.
For most DIY users, a basic masonry bit set covers common household needs. These bits are widely available and compatible with both hammer drills and regular drills. Specialty masonry bits exist for reinforced concrete or professional use, but they are rarely necessary for typical brick drilling tasks.
Material Considerations
Brick hardness varies more than many people expect. Some bricks are dense and fire-hardened, while others, especially older bricks, are softer and more porous. This affects drilling speed, pressure, and whether hammer action is appropriate.
When drilling into softer brick, excessive hammering can cause the hole to crumble or become oversized. In these cases, using a masonry bit with steady rotation and light pressure often produces cleaner results. Slowing the drill speed also helps prevent surface chipping.
Mortar joints drill much more easily than brick itself. For lighter loads, drilling into mortar instead of brick can reduce the risk of cracking. However, mortar is weaker than brick, so it may not hold heavy anchors as securely. Choosing the location depends on the load and long-term durability required.
Common Mistakes to Avoid
One common mistake is using too much pressure while drilling. Masonry bits work by grinding, not forcing their way through material. Excessive pressure can overheat the bit, damage the carbide tip, or cause the drill to bind suddenly.
Another frequent issue is drilling at high speed. High RPMs generate heat quickly and can glaze the brick surface, making drilling harder instead of easier. For most brick, a slow to medium speed with consistent pressure produces better control and cleaner holes.
Skipping pilot holes or misaligning the drill is also a problem. While masonry bits do not require pilot holes in the same way wood bits do, starting crooked can result in angled or oversized holes. Taking a moment to mark the location and hold the drill square to the surface improves accuracy.
Frequently Asked Questions
Can I drill into brick without a hammer drill?
Yes, a standard drill can be used with a masonry bit, especially for small holes. The process will be slower, and steady pressure is more important. For harder brick or larger holes, a hammer drill makes the job easier.
Is brick harder to drill than concrete?
In many cases, brick is slightly softer than poured concrete, but this varies by brick type. Some dense bricks can be nearly as hard as concrete, while others drill very easily. The bit and technique remain the same in either case.
Should I drill into brick or mortar?
For light loads, mortar is often acceptable and easier to drill. For heavier fixtures, brick provides better holding strength. The decision depends on the weight being supported and the condition of the masonry.
Why is my masonry bit not making progress?
This is usually caused by high speed, dull bits, or excessive pressure. Slowing down, easing pressure, and checking that the bit is designed for masonry typically resolves the issue.
Do I need to cool the bit while drilling?
For short holes, cooling is usually unnecessary. For deeper holes or very hard brick, pausing occasionally helps prevent overheating. Letting the bit cool naturally is usually sufficient.
Final Thoughts
Choosing the right drill bit for brick comes down to using a masonry bit sized correctly for the anchor and adjusting technique based on brick hardness. With steady pressure, moderate speed, and proper alignment, most DIY users can drill clean, reliable holes without specialized equipment. Taking the time to match the bit and method to the material leads to safer installations and longer-lasting results.