Your impact driver is typically the lighter of the two, though. The impact driver is usually still more compact by quite a bit, but the gap between the weights shrinks. That changes as you shift to compact hammer drills, though. When we’re talking about heavy-duty hammer drills, it’s a massive difference you can easily see and feel. If you don’t mind wearing some hearing protection, your impact driver is usually smaller and lighter than your hammer drill. If you want the benefits of an impact driver without as much sound, consider a hydraulic (oil impulse) impact driver. 12 decibels is a huge difference: more than twice as loud and 16 times the sound pressure level. Indoors, we measured our impact driver right at 100 decibels while the drill was just 88. There’s no getting around the fact that impact tools are louder than drills. However, there are some key differences that really make a difference in what it’s like to use them. I’m not going to go over every little feature between the two tools. Verdict: Hammer Drill Key Feature Differences in an Impact Driver vs Hammer Drill Comparison That means you can’t use a full range of drill bits in an impact driver and you need a hammer drill or drill driver for at least some of your work.
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