vlad_the_invader
Full Member
I gotta ask….what is the difference between an impact driver and an electric screwdriver, and what use cases for each?
Electric screwdriver is basically the same as a drill. It just rotates.
Impact driver is basically a hammer and an anvil battering into each other creating a rotational movement from the successive impacts. The impact driver is delivering loads of high force impacts, one after the other. The screwdriver is just a motor turning smoothly.
Bit like hitting a spanner round in a circle vs pulling on the spanner. You’re going to get much more force from hitting it but as it’s not a sustained force it doesn’t damage the bolt. The impacts from the driver are relying on the torsional flex in the material of the fastener and the material of the bit to hopefully not damage and snap things.
If I was going to use and electric screwdriver, it would be to wind a screw into a pre drilled hole. I’d use an impact driver to drive screws straight into wood.
Impact driver is also useful for driving big screws or bolts into things. Lots of little impacts is far more effective than the high torque twisting of a drill or driver. Constant force would likely shear the head of the screw. Momentary force is less likely to knacker it.