Question about Dewalt DW999K 7/8" Cordless SDS Rotary Hammer

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Greasing - when & where?

I have no manual for my dw999k (if anyone can upload one that would be great!)
I can't work out where to apply grease to this drill. My previous drill had a chamber to fill up but not this one. Amy ideas much appreciated.


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  • 23 Answers

this drill has self-lubricating bearings and shouldn't need grease

Posted on Nov 26, 2008

  • booba loo Jan 04, 2014

    My B&D started leaking grease from the gear case, so I would say that there is definitely grease in the unit.


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Baumr ag User Manual Needed
  • There should if available for your model type a maintenance kit neccesary for your model or all the used o-rings and sometimes special tools because there are special buna-n or nbr o-rings used sometimes braun or green colored on some parts and gaskets, seals and rings used and allways if your tool is leaking then replace the impact bold in front of the spindle if you have find the right drawing for your model type
  • The right lubrication is very important in combination of the o-rings because of the heat building release by rotating and hammering and a leaking tool has oft made all o-rings hardenet because of the failed pneumatic working loose of lubrication dried out principal it becomes very dry internal on some places and much to hot .

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I believe this tool takes 225 ml of grease, but I would strongly recommend installing a service kit #1-617-000-702
The service Kit comes with grease and all the normal wear parts (highlighted below in black circles) Service Pack 1617000702 for Bosch Power Tool eReplacement Parts

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DeWalt dwd520 grease

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Jan 04, 2014 | Dewalt DW999K 7/8" Cordless SDS Rotary...

1 Answer

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There is supposed to be grease on the chuck end of SDS+ and SDS Max bits. Actually, you should put a little lightweight grease on the end of the bit every time you put one in your drill. If you, or noone who has ever used the drill, have ever done this, it is possible internal grease is leaking out of the drill and it should not. There are seals to prevent internal grease from getting out of the transmission and striker mechanisms. If you are loosing internal grease, these seals should be checked.

Feb 14, 2013 | Dewalt DW005K Rotary Hammer

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What position should striker be in a Bosch 11203

It works on a pnumatic system, Light oil or grease is fine on the piston its self but grease in the gearbox. (don't over do it) Have the piston partially sticking out. Make sure you locate it onto the ecentric cam correctly. If it does not hammer at first just run it for a while against the work, stopping and starting it in short bursts.

Jun 06, 2012 | Rotary Hammers

1 Answer

How do I remove the screw holding the keyless chuck. Dewalt cordless 18v hammerdrill, I know it's reverse thread but it still will not come out. Is there a locking mechanism?

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I have bought a 2nd hand makita 1800 chisel hammer is it oil or grease you put into the reservoir on the top of the machine

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2 Answers

I have a bosch rotary hammer 11245evs and it was working when i put it away in its case, now it will not hammer. Drills ok. larry

They are filled with a special grease that comes from Bosch. It sounds like the impact bolt or the striker pin in the unit are not moving the way they should. These are the pieces that work together to create the hitting action. About all that can be done now is the unit has to be dismantled to get those to pieces moving again. Bosch makes what they call service packs for all thier hammers. They have all the o-rings and grease to get your hammer working again. A Bosch service center can supply you with the kit. Ask for P/N 1617000225, or they can take care of it for you.
Hope this helps

Apr 16, 2009 | Bosch 11241EVS SDS-Max Rotary Hammer

1 Answer

I have a makita hr2455x rotary hammer drill that won't hammer

you need to get that service,
the grease causes the hammering.
and probably too much pressure was applied
to it.

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