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Discuss Concrete grinding options in the Tiling Forum area at TilersForums.co.uk.

  1. Filip

    Filip Active Member

    Location:
    Midlands
    I ned to grind down some concrete high spots to get a better level before I tile, mainly a sand and cement mix without any pebbles. What is the best attachment to use with my 115mm angle grinder. My research on here leads me to a silicone carbide product, would this be any use --here as I already have the backing pad. I also have a bosch Pex 125 sander with velcro pad I can use, or do I go for a diamond disc/pad.
     
  2. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Yorkshire
    Have you got some dust extraction that is the question?
     
    • Agree Agree x 1
  3. LEE MAC

    LEE MAC Trusted Advisor Professional Tiler JOTM Winner

    Location:
    BELFAST
    Silicone carbide products are a waste of time for this type of task, get something like below. But as already stated dust extraction is paramount this will. E a big health risk.
     
  4. Filip

    Filip Active Member

    Location:
    Midlands
    There was nothing below - what were you linking to ?.
    The area is outside and I was planing on attaching a heavy duty vacuum cleaner either with a shroud - home made or positioning the vacume end near the flow of dust
     
  5. LEE MAC

    LEE MAC Trusted Advisor Professional Tiler JOTM Winner

    Location:
    BELFAST
    5AB0D445-8D5D-49A9-A021-7469D62376C8.jpeg
    One of these would be better, I got there eventually :confused:
     
    • Funny Funny x 2
    • Like Like x 1
  6. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Yorkshire
    That will certainly do it, but there’s no holding the vac near by, you need to get a propper cowl and suitable vac
     
  7. pdc

    pdc Living the dream..... Professional Tiler

    It is outside so he could just wait for a windy day!
     
    • Funny Funny x 1
  8. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner

    Location:
    Yorkshire
    Even better a rainy windy day
     
    • Creative Creative x 1
  9. antonio

    antonio Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    italy
    and maintain good neighborly relations ...
     
    • Like Like x 1
  10. Filip

    Filip Active Member

    Location:
    Midlands
    Thanks chaps.The concrete area is normal mix with stones that was here when we brought but was a rough mess so I top dressed it with a sand and cement mix so do I actually need such an aggressive tool? That screwfix one unfortunately will not fit as it is a 125mm and my grinder is 115mm.
    Can anyone recommend an under £15 one 115mm, I have just been looking and found some as low as £8 on ebay.
    Is there anything similar that I could use on my 125mm orbital sander.
    The problem with angle grinder is it only has one speed which throws out all the dust but the bosh sander I can control at a lower speed.
     
  11. LEE MAC

    LEE MAC Trusted Advisor Professional Tiler JOTM Winner

    Location:
    BELFAST
    You may be better simply hiring all you need for the day, vacuum included.
     
    • Agree Agree x 1
  12. Filip

    Filip Active Member

    Location:
    Midlands
    Thanks but I have a vac for the job and I may only need the the pad for 1 hour and then I do not mind it sitting in my tool box for a few years before I need it again. Equally I do not mind a very cheap one that will only last the one job.
    What I am worried about is a very cheap one disintegrating itself rather than the concrete..
     
  13. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
    Not even a Cheap grinding cup will be weaker than the concrete, they’re very aggressive.
    Should really be used with a variable speed grinder with high torque, something like a flex.
    A lot of 125 discs will fit inside a 115 cowl.
    I put 125 discs on my 115 grinder quite frequently.
    There’s no real shortcuts unless you try going at it with an SDS drill with a scutching comb.
     
  14. Filip

    Filip Active Member

    Location:
    Midlands
    I never knew you could get variable speed ones but its a long time since I brought one you mean like this Like this one
    or are there trigger sensitive ones.
     
  15. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
    Yes like that one, however, that is NOT variable speed

    This fits a 115 standard grinder.

    Grinding cup
     
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