I was watching some power tools and came across an impact wrench made by Bosch, it had 200NM of Torque at 3400 RPM which is close to 120 BHP which is way too much for a tool that weigh only 1200 grams, many small cars don’t generate that much of torque and power, Suzuki Swift for example. So I was wondering what’s the difference between the torque/power generated by both of them?
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That’s the peak torque generated during an impact.
The difference is that a car can provide torque continuously, but the impact only provides it for like a handful of milliseconds.
Maybe imagine it as the difference between force applied by sinking a nail by just pressing it down vs striking it with a hammer. It’s near impossible to just press a nail in with your hand. But when swinging the small amount of force you apply to the hammer results in energy stored as inertia during the swing, and when it strikes results in the inertia transferring energy to the nail as a very high force over a much shorter period of time.
Impact wrenches are basically the same, just storing energy as rotational inertia and releasing it over a small period of time as a strike on an internal clutch mechanism.
Yeah, the two statements shoved into one is what’s getting you. The tool can probably hit around 3400rpm when there’s no tool on it. And it can probably produce around 200Nm of torque during the impact at very low speed. They will never happen at the same time, unlike happens in a car, where a car’s peak torque is measured at that continuous rpm.
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