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Thread: School me on hammer drills

  1. #1
    Serial Lurker biteme's Avatar
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    School me on hammer drills

    I need to put in some posts for a retaining wall and i've hit sandstone. According to Mr Kennards an auger won't do it and I've considered Jackhammers. Since I'll need to do a lot of holes for the wall and lots of decking I figure it will be easier/cheaper to get a jackhammer or hammer drill (with big ass bit) and just break it up.

    The holes for the wall (not the deck so much) need to be hella deep (1.2m) I'll a hammer drill with big ass bit might easier to get into the hole without creating and open cut mine sized hole. The top drill below should be able to smash/drill sandstone easily I assume.

    I gather there are combo ones but couldn't see one on the sydneytools site.

    Anyone got any comments on these and in general appreciated.

    http://sydneytools.com.au/shopexd.asp?id=1200&bc=no - This looks the go :-)
    http://sydneytools.com.au/shopexd.asp?id=1853&bc=no
    http://sydneytools.com.au/shopexd.asp?id=11783&bc=no
    http://sydneytools.com.au/shopexd.asp?id=10245&bc=no
    http://sydneytools.com.au/shopexd.asp?id=12182&bc=no

    I suspect the following is crap!
    http://www.agrmachinery.com.au/buy/b...hammer/jh-1050

    Thanks

    Byron
    When too much horsepower is barely enough

  2. #2
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    i bought a $150 1500W ozito thing from bunnings, ripped up 2 concrete slabs and all the tiles in my house, still goes hard.

    IIRC the ozito shit is "if it breaks in 3 years bring it back for exchange"
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    "The bitches, are wet" Sketchy's Avatar
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    Hilti > *


    If you're a cheap cunt home handyman then Ozito for the win. I've bought a few of those tools for various things and they just do not fuck out.
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  4. #4
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    i bought a rotary hammer drill from trade tools (trade tool brand) for only $120 3 months ago. it is every bit as good as our old hilti item which cost over$750.

  5. #5
    Got Stock?
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    i have the ozito, my figure is 3 year it seems to have enough power and not get stuck and its not really a surgical tool.

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    Pf always recommends makita!!

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    Temporary Australian Rorz de Puniet's Avatar
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    Hilti or Ramset if you're a baller.
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  8. #8
    Chopped BigMuz's Avatar
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    Say 'rotary hammer' rather than hammer drill.
    Retard Honour Wall.
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    you stupid fucken imbicle.
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  9. #9
    sweet as cuz Its me's Avatar
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    Not entirely sure what you're trying to do, but I have a feeling you're after the wrong tool.
    .

  10. #10
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    I think you can get cheap jack hammers from bunnings.

  11. #11
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    If you really need to cut largish holes in the sandstone then a big rotary hammer drill to drill a series of holes down to the depth you need and then a chisel bit used with the rotation stopped would do it.
    BUT
    If it's solid rock then get your engineer to redraw it and have someone weld a large plate on the end of each post with bolt holes in it. Drill appropriate sized holes in rock and chemset bolts in. Faster, easier and less fucking around than trying to drill big holes in rock.

    Mick

  12. #12
    Temporary Australian Rorz de Puniet's Avatar
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    Quote Originally Posted by JMick View Post
    If you really need to cut largish holes in the sandstone then a big rotary hammer drill to drill a series of holes down to the depth you need and then a chisel bit used with the rotation stopped would do it.
    BUT
    If it's solid rock then get your engineer to redraw it and have someone weld a large plate on the end of each post with bolt holes in it. Drill appropriate sized holes in rock and chemset bolts in. Faster, easier and less fucking around than trying to drill big holes in rock.

    Mick

    This man... he knows. Drilling a couple holes then squirting in some chemset and chucking in some threaded rod to bolt a plate to > drilling holes over 1m deep.

    Just make sure you put some nuts under and above the plates so that you can level them off once the chemset has hardened otherwise your posts will be on the piss.


    HTH
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    Quote Originally Posted by Rorz View Post
    ..............Just make sure you put some nuts under and above the plates so that you can level them off once the chemset has hardened otherwise your posts will be on the piss.


    HTH
    You'll also need to grout between the stone and the steel plate after you have levelled with high strength/low shrinkage grout. It's basically a mortar mix with high tech additives. Available from Hilti, Ramset and specialised suppliers.

    Mick

  14. #14
    PF's #1 soft roader advocate Captiva Fan's Avatar
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    Does one need to wear the Hammer pants when using these tools?
    Soft roaders represent an excellent compromise between the needs of the hardcore 4x4 user and the convenience of a city hatchback. Its clear to see why they have become so popular in todays society.

  15. #15
    Temporary Australian Rorz de Puniet's Avatar
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    Quote Originally Posted by JMick View Post
    You'll also need to grout between the stone and the steel plate after you have levelled with high strength/low shrinkage grout. It's basically a mortar mix with high tech additives. Available from Hilti, Ramset and specialised suppliers.

    Mick

    They sell the same brand we use at work at Bunnings these days too.


    Quote Originally Posted by Forg View Post
    Does one need to wear the Hammer pants when using these tools?

    It definitely helps.
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  16. #16
    Registered tax offender SuperDave's Avatar
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    Quote Originally Posted by Rorz View Post
    This man... he knows. Drilling a couple holes then squirting in some chemset and chucking in some threaded rod to bolt a plate to > drilling holes over 1m deep.

    Just make sure you put some nuts under and above the plates so that you can level them off once the chemset has hardened otherwise your posts will be on the piss.


    HTH
    Follow this and JMick. I'd assume the 1.2m depth is the standard depth for most soils. Bearing on something solid would surely reduce the depth you need.
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  17. #17
    Serial Lurker biteme's Avatar
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    All great advice. I bought an Ozito hammer drill and got a bit deeper in 1 hole. I think it's engineer time and either do a concrete or similar wall that needs less footings or as suggested drill a big hole. The rock seems fairly continuous!

    Thanks

    Byron
    When too much horsepower is barely enough

  18. #18
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    How high does the retaining wall need to be? You could go with dry stack concrete blocks, with Y bar glued into the rock at appropriate intervals, horizontal Y bars in every 2nd course (or every course) and the whole thing core filled. You'll still need to get a brickie to lay the first course on mortar for you to get it all level.

    Mick

  19. #19
    Chopped BigMuz's Avatar
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    YOU NEeD A ROTARY HAMMER.
    Retard Honour Wall.
    Quote Originally Posted by Sloth View Post
    Rob Sloth Young did i ask for your opinion? no. i only want it for a paddock bomb. go play with traffic.
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    you stupid fucken imbicle.
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    your are a fucken idiot of the highest level.

  20. #20
    i like to ski redgsr's Avatar
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    Just found this thread in google lol.

    I just blew up a hammer drill. Blue Bosch corded one. https://www.bunnings.com.au/bosch-bl...drill_p6200462

    Cunt of a thing failed me right at the end of my work renovation, have drilled 100+ holes in brick and have about 10 to go.

    One day I borrowed one of the tradie's SDS numbers, went through the bricks like cheese.

    Should I get something like this or is it a piece of shit? https://www.bunnings.com.au/ozito-90...l-kit_p6290249

    Once I finish this job it won't get a lot of use but my work and place at the snow have brick walls so a hammer drill is something I'll want to have handy.
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  21. #21
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    Thereís was another thread about these drills and there was a certain ozito model that was shitloads better than the others.

  22. #22
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    I had an ozito rotary hammer. I was doing metal installation in a 6 level car park it did about 1000 16mm holes before it died the ramset, hiliti and bosch are all much better options if you are going to want to do more than 1000 holes.

  23. #23
    PF's #1 soft roader advocate Captiva Fan's Avatar
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    Soft roaders represent an excellent compromise between the needs of the hardcore 4x4 user and the convenience of a city hatchback. Its clear to see why they have become so popular in todays society.

  24. #24
    sweet as cuz Its me's Avatar
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    Thatís a MC Hammer you stupid cunt.

  25. #25
    PF's #1 soft roader advocate Captiva Fan's Avatar
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    Soft roaders represent an excellent compromise between the needs of the hardcore 4x4 user and the convenience of a city hatchback. Its clear to see why they have become so popular in todays society.

  26. #26
    Chopped BigMuz's Avatar
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    A hammer drill is junk compared to a rotary hammer, if you've got any amount of drilling masonry just get a rotary hammer. The ozito ones are fine for handyman use though they have ramped the price and cut the warranty.
    Retard Honour Wall.
    Quote Originally Posted by Sloth View Post
    Rob Sloth Young did i ask for your opinion? no. i only want it for a paddock bomb. go play with traffic.
    Quote Originally Posted by Fondles View Post
    you stupid fucken imbicle.
    Quote Originally Posted by Fondles
    your are a fucken idiot of the highest level.

  27. #27
    Registered User Stix Zadinia's Avatar
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    http://www.ramset.com.au/Product/Det...-Rotary-Hammer


    like a knife through butter, but not cheap (and probably a Milwaukee underneath)
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  28. #28
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    None of these tools are what you need.

    If you need to cut a big fucking hole in sandstone, you want to rent a core drill. Essentially a big effin' cup saw. Once you've cored the 150mm hole, you drill down the middle of the round pillar of sandstone and pour that center drilling full of demolition grout. In ten minutes, you have a big fucking hole full of gravel.

    That said, I think the bolt-a-plate-down option is better and you could get by with a SDS shanked drill-Would also recommend renting a good Makita AVT 25mm or anything german for this job too.

    PS I've had a few libations and should be asleep right now.
    Last edited by Xnke; 08-12-17 at 05:12 PM.

  29. #29
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    Also demolition grout does not mean gunpowder. I recon that's not exactly on the shelf down at Bunnings, but you might look for Dexpan.

    https://www.amazon.com/Dexpan-Demoli.../dp/B00ET9OVW6

  30. #30
    Ellis Juan mizone's Avatar
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    Had a Festo (Festool now or the other way around) that died this year. Was mint, just got to get the spares to bring it back.

    Replaced with a Milwakee. Bang for buck but there are better tools out there.

    Of interest - I went over to two builder mates, both had Ozito big arse things. Seem to do the job drilling into very old house slabs.

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