SDS hammer drills are similar to impact drills, except they provide much more power. These machines perform a hammering action that is delivered by a pneumatic hammer which physically strikes the back of the drill bit in order to hammer it into the material (as opposed to a simple ratcheting mechanism).
Many SDS drills also feature a rotation stop which allows them to be used for chiseling, and an impact stop which turns them into a conventional drill for use in wood or metal. Cordless SDS drills provide great flexibility, as the absence of a power cord allows easier mobility and removes the need to work near a mains socket.
SDS stands for 'special direct system'. The name originally comes from the German “steck, dreh, sitzt” (which translates as insert, twist, fits) and stands for “spannen durch system” (clamping system).
SDS describes the drill bit clamping mechanism in these drills. The specially designed drill bit can be changed without the use of tools simply by pressing the chuck backwards and opening the clamping mechanism. The drill bit’s grooved shank allows it to move freely and it is held securely in the tool holder by 2 ball bearings, thereby enabling the hammer action. This hammering action is not only more powerful, but also results in less wear on the chuck.
We have a great range of SDS drill bits and chisels at great prices!
We also stock a huge range of electric-powered SDS-Plus drills, which can offer even more power than the cordless versions (although they are more restricted in terms of flexibility). We also have corded SDS-Max drills for more heavy-duty applications.
Here at Kelvin Power Tools, our staff are always happy to share their expertise to help you find the right tool for the job! If you have any questions or need some tool-related advice, then please don't hesitate to contact us.