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Angle grinder disc size

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  • 25-02-2021 7:48pm
    #1
    The Witches Cat
    Registered Users Posts: 257 ✭✭


    Hi
    Can you use a 4 and a half inch disc on a grinder that takes 9" discs with a disc bore size of 22.2mm???
    Thanks


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    #2
    Stigura
    Registered Users Posts: 3,413 ✭✭✭Stigura


    I don't know the answer. But, I have a 4 1/2" grinder and a 9" one. Frankly? It would never even cross my mind to put a disc made for the little one into that Beast.


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    #3
    Gen.Zhukov
    Registered Users Posts: 1,880 ✭✭✭Gen.Zhukov


    The Witches Cat wrote: »
    Hi
    Can you use a 4 and a half inch disc on a grinder that takes 9" discs with a disc bore size of 22.2mm???
    Thanks

    Strange question lad. If it was the other way around - can I use what's left of a 9" disc on a 41/2" grinder? - I'd understand.

    Why would you want to put a 41/2" disc on a 9" grinder?

    To clarify:
    100mm (4") disc 16mm bore
    115/125/180/230mm (4.5"/5"/7"/9") all 22mm bore


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    #4
    The Witches Cat
    Registered Users Posts: 257 ✭✭The Witches Cat


    Gen.Zhukov wrote: »
    Strange question lad. If it was the other way around - can I use what's left of a 9" disc on a 41/2" grinder? - I'd understand.

    Why would you want to put a 41/2" disc on a 9" grinder?

    To clarify:
    100mm (4") disc 16mm bore
    115/125/180/230mm (4.5"/5"/7"/9") all 22mm bore
    Hi. I have a kutzall 115mm grinding dish and the chap said it would work best with power of a 5" or 9" grinder


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    #5
    SCOL
    Registered Users Posts: 446 ✭✭SCOL


    The Witches Cat wrote: »
    Hi. I have a kutzall 115mm grinding dish and the chap said it would work best with power of a 5" or 9" grinder

    I keep my good worn 9 inch disc and put them on my 4.5 inch grinder


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    #6
    steviebg
    Registered Users Posts: 157 ✭✭steviebg


    The Witches Cat wrote: »
    Hi
    Can you use a 4 and a half inch disc on a grinder that takes 9" discs with a disc bore size of 22.2mm???
    Thanks

    9 inch discs shouldn't be used on 4 inch grinders, and vice versa. They have different speed ratings and cann easily shatter and do you a bit of damage.


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    #7
    Mugser
    Registered Users Posts: 523 ✭✭✭Mugser


    Don't attempt to use on the machine they're not made for!!!
    Can't stress it enough.
    9" grinder runs at 6500 rpm.
    4" runs at 13500rpm.


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    #8
    SCOL
    Registered Users Posts: 446 ✭✭SCOL


    Mugser wrote: »
    Don't attempt to use on the machine they're not made for!!!
    Can't stress it enough.
    9" grinder runs at 6500 rpm.
    4" runs at 13500rpm.

    But when the 9" disc gets down to 4" happy days, put it on the small grinder.

    Recycling at it best :cool:


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    #9
    Mugser
    Registered Users Posts: 523 ✭✭✭Mugser


    SCOL wrote: »
    But when the 9" disc gets down to 4" happy days, put it on the small grinder.

    Recycling at it best :cool:

    If you end up in your local A&E with a bit of shattered grinding disk stuck in your neck, for the sake of a few euro 4" grinder disk, then just remember, you were warned!!:rolleyes::rolleyes::rolleyes:


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    #10
    SCOL
    Registered Users Posts: 446 ✭✭SCOL


    Mugser wrote: »
    If you end up in your local A&E with a bit of shattered grinding disk stuck in your neck, for the sake of a few euro 4" grinder disk, then just remember, you were warned!!:rolleyes::rolleyes::rolleyes:

    Well I'm doing it for the last 25 years, I also have a dremel tool and cut disk up to use on it. :eek:


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    #11
    Mugser
    Registered Users Posts: 523 ✭✭✭Mugser


    SCOL wrote: »
    Well I'm doing it for the last 25 years, I also have a dremel tool and cut disk up to use on it. :eek:

    :rolleyes::rolleyes::rolleyes::rolleyes::rolleyes::mad::mad::mad::mad::mad:
    Ok so, for anyone who stumbles across this thread as a result of a google search, take it from a qualified tradesman with 30yrs on the job;

    DO NOT USE A WORN DOWN DISK FROM A 9" GRINDER ON A 4" GRINDER!!!!!!!


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    #12
    The Witches Cat
    Registered Users Posts: 257 ✭✭The Witches Cat


    Any idea if you can get Kutzall grinding dishes in Ireland???


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    #13
    The Mulk
    Registered Users Posts: 1,302 ✭✭✭The Mulk


    I went into a popular DIY shop on Baggot St. Dublin and asked the young lad working there for a 4" diamond cutting disk, he looks behind the counter through all the disks and says "Sorry, I only have round ones".

    I buy them on Amazon now....

    Kutzall have a store on there.

    https://www.amazon.co.uk/stores/Kutzall/page/FE806F7A-4CF8-4E9D-AFCA-A3A689513AD7?ref_=ast_bln


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