Article: Hammer drill or rotary hammer? (Toolbox).

As the marketing manager for a power tool company, I'm often asked about the difference between hammer drills and rotary hammers. Buyers want to know why there's such a price difference between the two, and which tool is best suited for specific applications.

I advise users to answer four questions before making the choice: What material will you usually be drilling? How large will the holes be? Will you be drilling an occasional hole or for extended periods? Finally, will you only be drilling, or would it also be useful to be able to use the tool in chipping, or hammer-only, mode?

What Material?

Hammer drills are best thought of as conventional ...

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