On Tue, 11 May 2010 10:28:11 +0000 (UTC),
(Andrew Gabriel) wrote:

There are two things that need grease - the back of the bits where
they go into the SDS chuck, and the gearbox.
[...]
Topping up the gearbox grease isn't possible with all SDS. I'm
wondering if yours deliberately leaks the gearbox grease onto the
back of the bit?

I was talking about greasing the gearbox but I notice that all the
other replies have talked about greasing the bits. I never knew that I
was supposed to grease them, but then I did declare myself an sds
newbie :-)

I think the bits do come out with grease on them, though I hadn't
realised it was a design feature!

The drill is a Screwfix Titan like this:
http://www.screwfix.com/prods/88854/...SDS-Plus-Drill

On the enlarged photo, you can see an array of slots on the front of
the blue bit and a slot on the side where the blue plastic half meets
the metal top half. Grease seems to be ejected from these. The lid for
the gearbox is the black circle nearest the handle.

Does the gearbox drive just the hammer action or also the rotation?
I'm wondering whether it is the hammering that eats the grease?

I'd agree on the weight issue. Mine's 2.something kg which is not
a problem to use for a long time. Unless you're built like Arnie,
the heavier ones are tiring. In 10 years, there are only two times
when it would have been nice to have a more powerful one, and the
rest of the time, not.

Although this is a 6kg drill, the figures for drilling capacity are
not that different to a blue bosch that weighs just 2kg, though I
notice the impact energy is claimed to be a respectable 4J.