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  1. #1
    Join Date
    Jun 2004
    Location
    St Louis, Mo for the past 25 years
    Posts
    7,425

    Default hammer drill won't hammer

    Have a friend who has the Bosch Bulldog hammer drill. It no longer hammers for him. I am suspecting the switch since it seems to be a click into place switch and not an electric issue.It drills just fine but no hammer or chipping ability. Any idea if that is something a guy not used to fixing tools might be able to replace? Him not me. My vote was more of the drill is nearly 8 years old it might be time to get a new one and just keep this thing as a heavy duty drill.

    Thoughts.....

  2. #2
    Join Date
    Feb 2008
    Location
    Northwest Indiana
    Posts
    5,576

    Default Re: hammer drill won't hammer

    If for some reason the bits do not seat completely, they will not hammer. The Bosch units we repaired for my fathers rental used a special grease in the hammer units. If the grease was low there would be no percussion. The piston acted on the grease which inturn acted on the anvil.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  3. #3
    Join Date
    Sep 2004
    Location
    Bergen County, NJ
    Posts
    4,410

    Default Re: hammer drill won't hammer

    I had my Bosch hammer do the same thing after a while. It's a bigger version than the Bulldog, but the repair was cheap and I was told it's really just a wear and tear item. It was a $600 tool, so putting $70 into it was a no brainer.

    I don't remember the exact problem but I do remember it was commonplace.

  4. #4
    Join Date
    Jan 2009
    Location
    Danbury area of western CT
    Posts
    4,440

    Default Re: hammer drill won't hammer

    I only used hammer drills for things like tapcon screws and such. Anything bigger reach for my SDS plus. IfI'm drilling rebar holes for tying a foundation I reach for the SDS Max. I have a Milwaukee hammerdrill that has been going strong for 12 years now.

    Phil
    It's better to try and fail, than fail to try.

  5. #5
    Join Date
    Feb 2008
    Location
    Northwest Indiana
    Posts
    5,576

    Default Re: hammer drill won't hammer

    Phil,

    The Bulldog is a SDS hammer drill/chipper. Inline configuration.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  6. #6
    Join Date
    Jan 2009
    Location
    Danbury area of western CT
    Posts
    4,440

    Default Re: hammer drill won't hammer

    Ahh! OK. I should have looked it up, sorry.;-)

    Phil
    It's better to try and fail, than fail to try.

  7. #7
    Join Date
    Apr 2008
    Location
    SF Bay Area (East Bay)
    Posts
    2,165

    Default Re: hammer drill won't hammer

    I actually just had this happen with my Bosch 11247; there was a moment of concern as I pictured my morning's work not getting done (although the tool has given enough use I wasn't too bummed). No hammering in either hammer/drill mode or straight hammer mode. I blew out some crud in the collar and in the chuck, and greased it up good. It still took a few attempts at hammering with a regular chipping bit before it sprang back into action, but it's been fine since. I think it was crud in the chuck or collar.
    k

  8. #8
    Join Date
    Jun 2004
    Location
    St Louis, Mo for the past 25 years
    Posts
    7,425

    Default Re: hammer drill won't hammer

    will be passing all the information along to the guy to try out. Will see if any of it works.

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