Question about Bosch 11241EVS SDS-Max Rotary Hammer

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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

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  • larry unger Apr 16, 2009

    yes that is correct--i am not getting and hitting at all. it will drill but will not hammer with the selector on hammer. are they filled with oil ? thank you

  • Corey McConnell
    Corey McConnell May 11, 2010

    I take it you have changed the selector from drill to hammer and you are not getting any hitting?



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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

Posted on Apr 16, 2009

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All grease packed hammers require a short period of time to warm up before starting the hammer function. Depending on the room temperature, this time may vary from approximately 15 seconds (90?F) to 2 minutes (32?F).
- and then be sure to turn the switch to position 3:
Hammering Only:
used for chipping and demolition work
- or:
Vario-Lock position is intended for use with chipping bits such as bull points, spades, gouges, etc.
Depress release button and turn the selector lever, to the "vario-lock" setting. Next, rotate the locking sleeve, along with the accessory, to the desired position. Then turn the selector lever to the "hammer only" setting and slightly turn the locking sleeve to have it automatically lock into a definite position.

i have a bosch rotary hammer 11245evs and it was - bosch-rotary-hammer-11245evs-l2syhiveb5h5n2hnqsepdito-2-0.jpg VARIABLE SPEED DIAL Your tool is equipped with a variable speed dial. The impact rate (BPM) and rotating speed (RPM) can be varied according to the type of work being performed by setting the variable speed dial to the selected setting
-check that also, perhaps it was moved during storing

Posted on Feb 07, 2015


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Posted on Jan 02, 2017

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