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Discuss Core Drill for boiler flues mainly in the Gas Safe Register Forum - Public Forum area at

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  1. Trev

    Trev Guest

    Hey Guys,

    I'm after a decent core drill for drilling mainly stone and brick for boiler flues where the clutch won't keep packing in (like on my old Makita). What do you recommend?
    I've been looking at the Marcrist DDM2, anyone got any experience with them?
  2. Roger Welton

    Roger Welton Plumber GSR

    Have the DDM2, excellent drill, though someone mentioned that they are discontinuing them.
  3. happyflyer

    happyflyer Guest


    You gas safe, don't think you can drill the hole, you can stand and watch a Gas Safe engineer do it... needs to be falling the right way. +- 0.346 of a degree
    • Like Like x 1
  4. Hybrid

    Hybrid Guest

    Not sure if serious .
    • Like Like x 1
  5. happyflyer

    happyflyer Guest

    Many a true word spoken in jest, only a Gas Safe man would know, says nothing on the drill does it??:dita:
  6. Hybrid

    Hybrid Guest

    Given some of the nonsense posted by some I had to ask lol!
    • Like Like x 1
  7. Trev

    Trev Guest

    Yes I am Gas Safe. Not sure how I go about showing it on these forums!

    A shame, it looks a good bit of kit. Like I say I've been using a makita but the clutch has gone on it a few times now so i've lost faith in it. Any recommendations on any other drills if thats discontinued?
  8. dancinplumba

    dancinplumba Trusted Plumber GSR

    Ddm 3 ?
    • Like Like x 1
  9. Billy Bob Bob

    Billy Bob Bob Guest

    well this gas safe man his losing his patience with your BS ramblings keep trolling the forums and i will give you a free,permanent holiday
    • Like Like x 4
  10. SimonG

    SimonG Trusted Plumber

    The blokes new to the forum and asking a serious question.

    Now where's Dancin with the ddm3?
    • Like Like x 3
  11. Dotty

    Dotty Guest

    Unless I beat you to it!

    Now that's 2 mods warned him in open forum.

    Next steps a long one!
    • Like Like x 3
  12. TBServices

    TBServices Guest

    I have a DDM2 and its awesome. I would get the DDM3 if I was buying again.

    Also they the DS150 to attach drill to and make your life easier.
  13. PETE 123

    PETE 123 Active Member

    Over the years ive gone for cheap drill when broken chuck away. Ive given up trying to win this situation as to either spend a lot for a good drill or buy cheap and have it break quicker
  14. TBServices

    TBServices Guest

    DDM don't have a chuck, just a thread to screw cores on.
  15. dancinplumba

    dancinplumba Trusted Plumber GSR


    Ooo here it is :)
    • Like Like x 3
  16. dancinplumba

    dancinplumba Trusted Plumber GSR


    Ooo anotha piccy :) :)
    • Like Like x 1
  17. TomLane

    TomLane Plumber

    Are they really that good?!

    Do a lot of core drilling for soil (is that okay with you happyclappyflyer?) sometimes core through Cotswold stone which can be quite tough.

    Do these make it quicker/easier or is it just a case they last longer?

    Apologies for jumping on to this thread.
    • Like Like x 1
  18. dancinplumba

    dancinplumba Trusted Plumber GSR

    Its down to the bit used, but these will take real stick, ask tamz :)
    • Like Like x 1
  19. Killy Bing

    Killy Bing Plumber GSR

    The main difference with a cheap core drill and a quality one is you dont lose time when they bind up, over heat or decide to threw you off a ladder when you hit a wall tie..

    get a hilti,marcrist or a milwaukee core drill.

    bosch used to do a decent one bt they discontinued it.

    put a good quality core with a decent quality core drill and youre laughing.
  20. TBServices

    TBServices Guest

    Good drills don't break your wrists when the bit bites lol.
    • Like Like x 1
  21. AWheating

    AWheating Trusted Plumber GSR

    sometimes its quicker to stich tbh, but i think the core bit is more important than the drill. Id rather have an ok drill and good bit than a good drill and a ok bit.
  22. Trev

    Trev Guest

    Thats why i've asked this question lol. The clutch has burnt out on my Makita a couple of times and both times its not done my wrist any good!

    Also, with regards to the core bits what are the Macrist bits like?!

    I've been looking at this deal, what do you guys think? Marcrist DDM2/CCU850X Diamond Core Drill Set 240v 7700.001.001 - £319.00 -

    I would like a ddm3 but I don't have the extra cash!
  23. TBServices

    TBServices Guest

    That's the exact kit I bought and its been great
  24. Trev

    Trev Guest

    I might have to invest in it this week then! From reading different reviews I haven't heard anyone say a bad thing about the DDM2!
  25. johnnyplumb

    johnnyplumb Plumber GSR

    hahaha, brilliant, pmsl
  26. mikegas

    mikegas Plumber GSR

  27. Roger Welton

    Roger Welton Plumber GSR

    Oh my dancing you do have a big one! (Drill that is!)
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