Rotary and demolition hammer - Delivers hammering actions as it drills.

When it comes to drilling or demolishing concrete, there seems to be an endless array of specialized tools claiming to be up to the task. However, the sheer number of tools designed to power through concrete can sometimes feel overwhelming.

HAMMER DRILL

As the name implies, this tool delivers a hammering action as it drills. This action is created by two internal metal disks with ridges. As the disks spin against each other, the ridges ride up and down and cause the chuck to move in and out. Hammer drills can have the hammering action turned off; with the flip of a switch and the swap of a bit, you can go from drilling in concrete block to boring into wood framing.

Because of the mechanics needed to create the hammering action, a hammer drill is typically more bulky than a traditional drill. That said, many of today’s hammer drills aren’t shaped and sized all that differently from traditional drills. A standoff handle to keep the tool steady is one telltale feature of a hammer drill.

ROTARY HAMMER

For larger holes, a rotary hammer is the go-to tool. A rotary hammer uses a piston to compress air that moves a striker to create the hammering action. The rate of the blows is slower than with a hammer drill, but those impacts are far more powerful. Think of the hammer drill as delivering numerous jabs and the rotary hammer as hauling off with haymakers. The power of the rotary hammer means less work for the user, but it also means that the rotary hammer is not suitable for use on wood or metal.

While hammer drills typically are outfitted with a standard adjustable chuck, rotary hammers have a spring-loaded chuck that corresponds directly to the size of the bits being used. This means that you must use only bits that fit that specific chuck.

Since the hammering force isn’t created by a spinning mechanism, as it is with hammer drills, rotary hammers can be switched to hammer-only mode. This is useful for light demolition work such as tile removal. Rotary hammers are generally bigger, weigh more, take on bigger tasks, and require less work from the user. They do, however, cost more, so if the job doesn’t call for it, purchasing a rotary hammer might be overkill and wasted dollars.

Choosing the Right Hammer

There are four main types of masonry/concrete hammers that you need to consider before making a purchase: rotary hammer, demolition hammer, combination hammer, and breaker hammer. With each specializing in a different task, it’s important to choose the right hammer for the right job.

• Interface Systems

You’ve chosen your tool and understand the different modes it can operate in, so it’s time to choose your bits. Interface systems refers to the type of accessories the tools can accept; concrete tools are available with a number of different interface systems.

• Know Your Operation Modes

The difference between drilling through concrete and merely chipping and plowing your way through is a big one. Depending on the task at hand, concrete and masonry drilling tools allow users to select different modes of operation.

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