Do I Need a Hammer Drill? (And When a Regular Drill Is Fine)

A hammer drill combines two actions simultaneously: rotation (like a standard drill) and rapid percussion — a forward-backward hammering motion that strikes the bit thousands of times per minute. This dual action pulverizes masonry while the flutes on the bit carry dust out of the hole.

Think of it this way: a regular drill cuts through material. A hammer drill pulverizes and cuts at the same time. That percussion is what makes concrete, brick, and stone drillable.

Most cordless hammer drills let you toggle the hammer function on and off. With hammer mode off, it works identically to a regular drill/driver — so you get two tools in one.

If any of these describe your project, a hammer drill (or SDS rotary hammer) is the right tool:

• Drilling into concrete floors, walls, or foundations — For Tapcon screws, wedge anchors, sleeve anchors, or lead shields
• Mounting into brick or cinder block — Shelf brackets, TV mounts, mailboxes, exterior fixtures
• Installing masonry anchors — Red Heads, epoxy anchors, concrete screws
• Drilling into natural stone — Granite, slate, limestone (use diamond-grit bits for harder stone)
• Running electrical or plumbing through block walls — When you need clean holes for conduit or pipe
• Any repetitive masonry drilling — A regular drill with a masonry bit might get through one hole after five minutes of struggling. A hammer drill does it in seconds.

Standard hammer drill vs SDS rotary hammer: For occasional anchor holes in concrete or brick, a standard cordless hammer drill is sufficient. For regular masonry work, large-diameter holes, or chipping/breaking concrete, step up to an SDS rotary hammer. The impact energy difference is enormous.

A hammer drill gives you no advantage on these materials — a regular drill works just as well or better:

• Wood — Regular drill bits cut cleanly. Hammer action would damage the wood and the bit.
• Drywall — You are drilling through gypsum and paper. Any drill handles this easily.
• Metal — Requires cutting, not pulverizing. Use a regular drill with the right bit (cobalt or titanium) and cutting oil.
• Plastic and PVC — Standard drill bits work perfectly. Hammer action would crack the material.
• Tile and glass — The percussion will crack tile. Use a regular drill at low speed with a diamond or carbide bit.
• General fastening — Driving screws, assembling furniture, hanging pictures — no hammer function needed.

If your project list is mostly wood, drywall, and general household tasks, a standard drill/driver is all you need. Many modern cordless drills include a hammer setting anyway, so you may already own one without realizing it.

This confuses a lot of people. Both drill into masonry, but they work differently and serve different levels of work:

Rule of thumb: If you drill into concrete or brick a few times a year for anchors and mounting hardware, a standard hammer drill is enough. If you are running conduit through block walls, drilling dozens of holes, or need to break up concrete, get an SDS rotary hammer.