The Medway Handyman wrote:
Using my Wickes/Kress SDS today in chisel mode & noticed a black sludge
creeping from the chuck along the chisel. Nothing I've ever added to the
chuck, because I've never added anything.

I suspect that 'this is not a good thing'.

Probably just telling you that you got it a bit hotter than normal...

Most of the decent SDS drill makers recommend a small amount of grease
applied to the shank of a drill bit occasionally - some lubrication will
also have been installed by the maker, which is probably what you are
seeing.

(the budget tools of old used to have substantial grease reservoirs that
needed refilling frequently. Before long this would be falling out of
every orifice in the machine and splattering all adjacent surfaces and
users! Needless to say the whole drill ended up a sticky mess before too
long).

--
Cheers,

John.

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