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Concrete grinding discs for handheld grinder ?

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  1. #1
    Senior Member YoungBolt's Avatar
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    Default Concrete grinding discs for handheld grinder ?

    Gday crew

    Ive got a corner of 1 foot x 1 foot area of concrete I need to grind down. Rise is about 10-12mm so it needs a good grind down. This is a section of concrete near my garage door has somehow managed to push up and as a result water is getting into my garage

    the driveway here for the block of units is terrible. There r cracks and raised sections everywhere that we’ve had to grind down in the past. The process to get pros out here to grind is painful so I was hoping to attack the section near garage myself

    Anyone used a grinding disc on a standard handheld grinder to grind down and polish a bigger area?
    Ive got a 125mm battery grinder that I’ve used a masonry cut off wheel to do some light edge grinding to grind down edges 1-2” long With maybe a 4-5mm rise but nothing as big as the area I need to grind down. There’s a 9” grinder in the shed I can pull out but I can’t imagine discs for it would be cheap and it ain’t my favourite tool to use in the world either.

    I’ve seen a few diamond cup disks but they aren’t cheap!
    i know there r flat grinding discs but being that a handheld grinder has the bolt in the middle it’s impossible to use as a grinder for a bigger a big surface

    I’ll try and post up pictures tomorrow.

    Suggestions on disks to use?

  2. #2
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  3. #3
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    https://www.bunnings.com.au/flexovit...wheel_p6311467
    https://www.bunnings.com.au/makita-2...-disc_p0104142
    This is cheaper if you want to give it a go.
    I'd try the 230mm one personally if you have the 9" grinder handy. You don't have to have it flat to grind, you put it on an angle and work along the surface.
    Make sure you wear all your PPE - safety glasses, dust mask, gloves etc.
    Never argue with idiots, they will drag you down to their level and beat you with experience.


  4. #4
    Senior Member YoungBolt's Avatar
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    Quote Originally Posted by Whitey66 View Post
    https://www.bunnings.com.au/flexovit...wheel_p6311467
    https://www.bunnings.com.au/makita-2...-disc_p0104142
    This is cheaper if you want to give it a go.
    I'd try the 230mm one personally if you have the 9" grinder handy. You don't have to have it flat to grind, you put it on an angle and work along the surface.
    Make sure you wear all your PPE - safety glasses, dust mask, gloves etc.
    I've done grinding with similar disks on a smaller area and ridge with lower height, it's fine on the angle for a small area, but I find it difficult to get a reasonably flat finish when you use the disk on an angle. Was hoping to use more a cup like disk to not have to work around the bolt in the middle of the disk,

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