There are two main types of hammer drill, percussion and rotary hammer. With percussion drills the chuck has a mechanism whereby the entire chuck and bit move forward and backwards on the axis of rotation, the motion is tied to the rotation of the chuck. Typically this type of drill can be used with and without the hammer action but it is not possible to use the hammer action alone as it is the rotation which causes the hammer motion. The second type uses a different type of chuck which allows the bit to move forwards and backwards independently and is usually powered pneumatically. As such this type of drill can be used in hammer-only mode which has certain advantages when dealing with very hard substances.
it is the best drill i have ever used for auger bits. straight through joists with ease. one lad we labouring for us described it as 'like hot c0ck through butter'
Yes I am an apprentice but I ment for use when I am a spark lol and very true you can never have enough tools lol an I have a 18v makita for simple drilling could e doing with upgrading that aswell but I could use an sds first and ok I'll keep an eye open for one
Note I say like that, not necessarily that exact one. These are available from many places under a whole host of different brands, and usually a lot cheaper than that.
I have one, that I bought when I started self employed 9 years ago and I paid about