> which will jam the machine. Only grease when it is most needed > and not
>> every time you use the machine.
>
> I don't know if other SDS drills are different, but this one has
> a wide screw cap on the top with a grease chamber above what
> could be the hammer action mechanism. I only refill when empty,
> but it empties quickly - say 2 hours of heavy use. ISTR the
> instructions say to expect 5 hours. However, I'm using it for
> chiselling all the time. It probably uses most grease in that
> mode and less with a more normal mix of drilling and chiselling. >
> Do the more expensive SDS drills usually need regreasing, or are
> any sealed for life? So far it's the one real bugbear in what has
> otherwise been a satisfactory machine for the price.
My Metabo (AFAIR) doesn't have any means to regrease it. I always apply a small smear of grease to the splines on the bits, and clean it off when I take them out. I think this was suggested in the instructions or by the shop for long life of the chuck.