Announcement

Announcement Module
Collapse

How To Post Images

Want to know the how to upload images to your posts? Image Posting Tutorial
See more
See less

Core bit Adapter question

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts

  • Core bit Adapter question

    I have to drill a 3/4 inch hole through about 12" of gunite in one of my rental home pools so that I can install an auto fill unit.

    I don't want to drain the pool completely so the use of a core drill on the inside of the pool is not an option. Plus the fact that the pool holds around 50,000 gallons of water. (hurts when you get that refill bill)

    My only option is drain the pool down around 12 inches to just below where the auto fill line has to come into the pool. All have to come in from the decking side of the pool. There is no way a core drill unit can be installed on the decking side. I prefer not to use a hammer bit because of the damage it most likely will cause with the plaster when it comes out the other side. Also I am screwed if I hit rebar.

    What I would like to do is use a core drill and attach it to one of our Bosch BullDog hammer drills.

    So my question, is there an adapter that will allow me to screw the core bit onto one side and a chuck or SDS adapter on the other?

  • #2
    Re: Core bit Adapter question

    I have an SDS adapter chuck that fits my Bosch hammer drill. It allows you to chuck up non SDS bits. I believe I bought it at Home Boy Depot a couple years ago when I had to drill through about 18" of masonary. It's a 1/2" chuck. Hope this helps.
    Last edited by killavolt; 09-30-2009, 12:18 PM.

    Comment


    • #3
      Re: Core bit Adapter question

      I may be wrong here but the way a core bit works and an impact drill work is different,

      the core bit spins and cuts by the diamond bits brazed on the edge of the tube, and the hammer drill works much like the star bit by hammering and cleaning of the hole by twisting yes there is some cutting by the carbide bit edges, but the majority of the cutting is by the hammering action, try the bit with the hammering off.

      some use a grinder with the 5/8" thread to power small core bits of the dry type,

      most of the core bit drills is normally a standard type drill with a water feed adapter, but they do make dry cutting bits as well.

      they make adapters to go from 5/8 thread to 1/2 shank for using in standard drills,

      take a look at the videos on this site,
      especial this video http://www.dynatech-diamond.com/vide...Bit%20high.wmv

      some use a wood guide with a hole in it of the right size to get the bit started,
      http://www.borzit.com/pictures/view....ures&UID=10070
      video from the dynatech company, http://www.dynatech-diamond.com/vide...plateshigh.wmv

      and as far as the under water option, jsut an Idea, use an air drill and just drill/core it under the water, speed or rpms would or may the bigest problem.
      Last edited by BHD; 09-30-2009, 03:52 PM.
      Push sticks/blocks Save Fingers
      ~~~~~~~~~~~~~~~~~~~
      "The true measure of a man is how he treats someone who can do him absolutely no good."
      attributed to Samuel Johnson
      ~~~~~~~~~~~~~~~~~~~
      PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

      Comment


      • #4
        Re: Core bit Adapter question

        Originally posted by killavolt View Post
        I have an SDS adapter chuck that fits my Bosch hammer drill. It allows you to chuck up non SDS bits. I believe I bought it at Home Boy Depot a couple years ago when I had to drill through about 18" of masonary. It's a 1/2" chuck. Hope this helps.

        We have those SDS to 1/2" chuck adapters already. What I am looking for is an adapter that will allow a core saw bit to be screwed in on one side and a shaft on the other end that will go into that 1/2" chuck.

        Comment


        • #5
          Re: Core bit Adapter question

          Originally posted by BHD View Post
          I may be wrong here but the way a core bit works and an impact drill work is different,

          the core bit spins and cuts by the diamond bits brazed on the edge of the tube, and the hammer drill works much like the star bit by hammering and cleaning of the hole by twisting yes there is some cutting by the carbide bit edges, but the majority of the cutting is by the hammering action, try the bit with the hammering off.

          some use a grinder with the 5/8" thread to power small core bits of the dry type,

          most of the core bit drills is normally a standard type drill with a water feed adapter, but they do make dry cutting bits as well.

          they make adapters to go from 5/8 thread to 1/2 shank for using in standard drills,

          take a look at the videos on this site,
          especial this video http://www.dynatech-diamond.com/vide...Bit%20high.wmv

          some use a wood guide with a hole in it of the right size to get the bit started,
          http://www.borzit.com/pictures/view....ures&UID=10070
          video from the dynatech company, http://www.dynatech-diamond.com/vide...plateshigh.wmv

          and as far as the under water option, jsut an Idea, use an air drill and just drill/core it under the water, speed or rpms would or may the bigest problem.
          Just a heads up I am familiar with Impact/core drilling etc... Been doing it for 30 years. Just never had a situation that merited creative thinking for a small bore core saw.

          Thanks for the video link. The adapter shown in that video is exactly what we need. Allows a core bit to be screwed in on one side and inserted into a 1/2" chuck.

          Contractor buddy of mine in Arizona checked with a couple of field guys and they say these adapters can be found at Grainger. All have to look into that in the next.

          Thanks again for the Video. I knew someone would help me out.

          Comment


          • #6
            Re: Core bit Adapter question

            Why not just use a regular 3/4" sds bit? Why do you need to core it?

            Comment


            • #7
              Re: Core bit Adapter question

              sorry I thought i put the link to the company,
              http://www.dynatech-diamond.com/index.html
              they have the adaptor

              some other for a straight adapter,
              http://www.google.com/products?q=cor...+11&hl=en&aq=f

              some with sds adaptors,
              http://www.google.com/products?q=cor...sds&hl=en&aq=f
              Push sticks/blocks Save Fingers
              ~~~~~~~~~~~~~~~~~~~
              "The true measure of a man is how he treats someone who can do him absolutely no good."
              attributed to Samuel Johnson
              ~~~~~~~~~~~~~~~~~~~
              PUBLIC NOTICE: Due to recent budget cuts, the rising cost of electricity, gas, and oil...plus the current state of the economy............the light at the end of the tunnel, has been turned off.

              Comment


              • #8
                Re: Core bit Adapter question

                where is so cal are you?

                i have the bit and drill for this. it's a diamond core that i run on 1 of 3 hand held machines and or a right angle grinder. the bit is 14'' long and the grinder takes up the least amount of room. even my hand core drills are shorter than a bosch bulldog drill.

                if you're near los angeles, beverly hills, santa monica, i can do it for you

                let me know.

                rick.
                phoebe it is

                Comment


                • #9
                  Re: Core bit Adapter question

                  3/4 inch hole or hole for 3/4 pipe - just want to make sure.
                  coring is very different from hammer drilling

                  MK http://www.mkdiamond.com/coring/bit_wet.html makes bits that will probably suit your needs. I have these bits in all sizes / applications (but not that small) and have had no issues with them. I'm sure that you will hit steel, so call them and ask their advice.

                  If youre looking for shorter bits, http://www.ukam.com/webcatalog_drills_ordering.htm has a excellent selection and will custom make bits (good stuff), they have the extensions you were askink bout.

                  If you dry core (like for granite counters, tub decks), these alpha bits are the best I used so far http://www.alpha-tools.com (rpm is size specific) /Product.aspx?PageCode=570 - hope this helps

                  Comment


                  • #10
                    Re: Core bit Adapter question

                    I suppose rick will charge less travel time than me

                    Comment


                    • #11
                      Re: Core bit Adapter question

                      Originally posted by bdp View Post
                      I suppose rick will charge less travel time than me
                      you know if you needed me to go to you, i would be all over it

                      rick.
                      phoebe it is

                      Comment

                      Working...
                      X