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  1. 13th February 2009, 08:14 PM #1
    AV Elec
    AV Elec is offline Senior Member
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    Default core hole drilling

    I am in the market to buy some core hole tools. I am mainly interested in brick and concrete block walls and i believe this rothenberger www.rexcrystal.co.uk/item.php?itemsID=1066 dry core hole kit should suffice. I can get it for a good price so I think it will be the one. Apparently dry drilling is fine for non hardened concrete.

    Does anyone know of a cordless drill which would suit? It recommends drills of minimum 850 watts, clutch, variable speed, capable of 3000rpm, non hammer.

    I have a brand new Dewalt 18 volt rotary hammer drill which is quite powerful and hammer can be turned off but surprisingly it is only 300 watts/1100rpm!

    The tool will be used for work so needs to be up to the task, however I don't fancy carrying one of those massive dedicated core hole drills around, particuarly since i can't bolt it to the clients brick wall like they do in industrial applications.

    Any thought's greatly appreciated.
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  3. 13th February 2009, 09:01 PM #2
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    mic-d
    mic-d is offline GOLD MEMBER
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    Default

    That links seems to be broken

    Haven't heard of any cordless with that much speed or power. For this application I think the clutch they specify is not the type seen on cordless drill which is typically for driving screws to a certain torque. I suspect it is a clutch like on these tools:
    http://www.metabo.com.au/Product-cat...fea4622.0.html
    which prevent twist injury, and I don't know of any cordless with that type of clutch either. Does it need to be cordless?

    Cheers
    Michael
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  4. 16th February 2009, 06:29 PM #3
    Stewy
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    I have a Milwalkee 28V cordless and have used it to drill 75mm core holes and it did it pretty easy. In saying that they were wet cores in concrete horizontally.
    Stewy
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