1. What’s the difference between a hammer drill and an SDS drill?

    What’s the difference between a hammer drill and an SDS drill?

    There’s a big difference between a standard impact drill and a hammer. An impact drill uses 2 ribbed disks that rotate in contact with each other. As the opposing ribs strike each other the impacts are transmitted to the drill bit, causing the characteristic ‘hammering’ sound. But for heavier jobs a hammer is much more efficient than a standard impact drill. A hammer uses a piston that repeatedly compresses the air above it, causing shocks that are transmitted directly to the drill bit. A hammer lets you do the same job in less time and with less effort.