In article ,
Vaughn wrote:

"Brian Lawson" wrote in message
...
Hey Knothead,

Not too sure what your post meant. There was a statement but no
question or start of a discussion.

If what you posting was a question about what this drill motor with
the SDS+ chuck is and the "special bits", then maybe I can help.
Hilti makes very good line of industrial tools, of which this is one,
that do not use a standard chuck to hold the tool. This type tool is
most generally used in "hammer mode" in concrete to make holes, or
set anchors with a Carboloy masonary bit. The shank of the tools has
a pair of "ears" forged into the shank, which are what the chuck grips
and drives. They fit quite loose, and they won't fit in anybody
elses tools, and the SDS chuck won't grip any other type but these.
What you might call a captive market.

The TE6 drill that I used for several years had a chuck that took a
drill with two depressions in the shank, a system that worked just fine as
long as you lubricated the chuck regularly. Is this SDS chuck something
new?

I think that Hilti hammer drills are the best. Drill bits were not a
big expense because we had them sharpened and/or repaired as needed and used
the same ones forever.

Vaughn



That is a SDS bit.
SDS+ has a few added grooves.
SDS MAX is the next size up for bigger drills, but looks very similar.