Polishing garden stone plates with angle grinder?

Discussion in 'Tools and Materials' started by Opski, 24 May 2015.

  1. Opski

    Opski

    Joined:
    8 Aug 2014
    Messages:
    10
    Thanks Received:
    1
    Location:
    Cleveland
    Country:
    United Kingdom
    Good day,

    Hope someone can advise me here.

    I purchased my first angle grinder today:
    Bosch PWS 720-115
    http://www.amazon.co.uk/Bosch-720-115-Grinder-discontinued-manufacturer/dp/B001E4GM6W

    My plan was to try and use it for polishing my garden stone plates:


    Upon getting it home, I realized that:

    1) I can use only a part of polishing disc area, not all 180 degrees due to the nut which holds the disc in place and stands in the way:

    2) I have no idea which disc to buy for this kind of stone plates?

    I have been googling around and saw this kind of discs:


    This looks much better but how can I use those with my grinder (how to install etc)?

    Could you please advise me a certain disc model/type for this kind of work (polishing garden stone plates) which will suit my Bosch grinder?

    Thanks a lot and sorry if this is a silly question - I never used grinder in my entire life.
     
  2. Sponsored Links
  3. HERTS P&D

    HERTS P&D

    Joined:
    9 Apr 2010
    Messages:
    13,348
    Thanks Received:
    2,072
    Location:
    Hertfordshire
    Country:
    United Kingdom
    Put the grinder away and get out the jet wash.

    Andy
     
  4. phatboy

    phatboy

    Joined:
    22 Jan 2012
    Messages:
    2,198
    Thanks Received:
    259
    Location:
    Jersey
    Country:
    United Kingdom
    What he said! Even a cheap jet should make them look like new.

    If you have never used a grinder before, watch some Youtube guides or similar - probably the tool with the most potential to harm or maim me in my entire tool shed!
     
  5. Dave54

    Dave54

    Joined:
    21 Dec 2008
    Messages:
    1,600
    Thanks Received:
    190
    Country:
    United Kingdom
    You don't use an angle grinder with the wheel flat like you're saying about, even if you could.
    Looks like there's no guard on it. If you do use it fit the guard.
    DO NOT use it without the proper guard!
    Get yourself the right protective gear too before using it.
    As already said they have the potential to do a lot of damage.
     
  6. Opski

    Opski

    Joined:
    8 Aug 2014
    Messages:
    10
    Thanks Received:
    1
    Location:
    Cleveland
    Country:
    United Kingdom
    Thanks for all that guys.

    Lets forget about my garden stones etc for a second.

    Which tool/disc/wheel I should use to polish some granite with my grinder if I would like to? Is this possible at all?

    Thanks
     
  7. phatboy

    phatboy

    Joined:
    22 Jan 2012
    Messages:
    2,198
    Thanks Received:
    259
    Location:
    Jersey
    Country:
    United Kingdom
    I don't think that's an appropriate tool for any polishing. For a start you need some speed control to polish properly.

    I've only ever seen bench grinders with polishing clothes and wheels on.
     
  8. Dave54

    Dave54

    Joined:
    21 Dec 2008
    Messages:
    1,600
    Thanks Received:
    190
    Country:
    United Kingdom
    I don't think an angle grinder is the right tool, although I may be wrong. I've seen granite being polished, and it was done with a multihead random orbital machine with diamond abrasives and a constant water flow.

    Incidentally without wanting to harp on about it, don't try fitting or using any of those wheels you have pictured there with an angle grinder. They are the wrong type.
    Use only wheels made for angle grinders, the correct size, and speed rating. They should be dated for expiry. I personally won't use ones that aren't still in date. There's an awful lot of energy in a rotating wheel. You really don't want one to burst!
     
  9. Norcon

    Norcon

    Joined:
    17 May 2008
    Messages:
    8,417
    Thanks Received:
    357
    Country:
    United Kingdom
    Think its mostly specialized.
    I'm working in a stone/marble facility at the moment. Will post a link to their supply catalogue tomorrow evening if I have time.
     
  10. Sponsored Links
  11. Norcon

    Norcon

    Joined:
    17 May 2008
    Messages:
    8,417
    Thanks Received:
    357
    Country:
    United Kingdom
  12. Opski

    Opski

    Joined:
    8 Aug 2014
    Messages:
    10
    Thanks Received:
    1
    Location:
    Cleveland
    Country:
    United Kingdom
    Thanks a lot for all your replies.
     
  13. seaangler

    seaangler

    Joined:
    10 Feb 2006
    Messages:
    273
    Thanks Received:
    17
    Location:
    Lancashire
    Country:
    United Kingdom
    you can get a diamond surface grinding disc but would probably cost you more than you paid for the angle grinder ( should have bought a pro tool not a diy one anyway )
     
  14. geraldthehamster

    geraldthehamster

    Joined:
    7 Feb 2010
    Messages:
    2,973
    Thanks Received:
    320
    Country:
    United Kingdom
    What people have said. You don't use an angle grinder for that. Also, that disc in your picture is a grinding disc, for grinding metal. Never use a grinder without the guard and handle attached. Never use an angle grinder while wearing gloves or long sleeves. An angle grinder is an extremely dangerous piece of kit and should be treated with the utmost respect.

    If you haven't used a grinder, and you don't have a use for the grinder, send the bl00dy thing back before you hurt yourself, and buy a pressure washer.

    Cheers
    Richard
     
  15. Norcon

    Norcon

    Joined:
    17 May 2008
    Messages:
    8,417
    Thanks Received:
    357
    Country:
    United Kingdom
    The stone facility I'm working in at the moment use angle grinders. Lots of them. And without guards.
    A lot of the grinding/polishing kit in that link is for direct use on angle grinders.
    And ones with M14 mounting thread. You could polish those slabs up to a nice glass finish if you wanted. Though mebbe be slippy.

    Have a 100mm diamond cup wheel for my own grinder.

    Power washers can be dangerous also. Seen a guy whip lash his arm with one.
    Mebbe the OP should just stay indoors wrapped in cotton wool and be safe.

    Their probably concrete anyrode.
     
  16. geraldthehamster

    geraldthehamster

    Joined:
    7 Feb 2010
    Messages:
    2,973
    Thanks Received:
    320
    Country:
    United Kingdom
    They're probably doing it for a living. But should still be using the guards.

    Yes, obviously the OP's slabs are concrete.

    Due respect to the OP, we all have tools that we're more familiar with than others. I'm just concerned when someone wants to use an angle grinder flat, with a grinding disc and no guard, to polish a concrete flagstone.

    Cheers
    Richard
     
  17. r896neo

    r896neo

    Joined:
    23 Feb 2007
    Messages:
    4,767
    Thanks Received:
    780
    Location:
    Belfast
    Country:
    United Kingdom
    I have a marcrist hf 850 grinding head i use for grinding and lightly polishing concrete.

    As other have mentioned though angle grinders are very dangerous and care must be taken with PPE etc. The majority of this sort of work is done with specialist polishing machines which have a much slower and variable speed compared to a grinder.
     
  18. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page