ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Concrete Core Drilling and Equipment

Updated on November 8, 2010

Concrete Core Drill Guide

Concrete core drilling is the process of boring holes into varying thicknesses of concrete, primarily for routing utilities through homes and commercial businesses. If the process of drilling concrete is something you have not done before stop and take the time to read this brief hub to get yourself acquainted with the boring process and concrete equipment.


Drilling and boring concrete is not like most do-it-yourself projects. The equipment used in concrete drilling is very powerful and technical. Working in this field can be a very hazardous activity. Accidents can happen on any job, but when extremely low geared drills and core rigs bind on the concrete and suddenly snap free people tend to get hurt. Like any activity, taking the time to read about the process and learn the use of the tools makes for a safer work environment.

Which Drill to Use.

The first step to drilling concrete is to match your job to your tool and bit. This is easy once you understand the process and the application of the drills. Most do-it-yourself jobs involve smaller holes for wire utilities or small tube lines, which are easily bored with hand-held drills. Holes 5 inches round with no more and 4 inches of depth should be easy to core with a hand-held drill. Wider or deeper holes stress that cause stress on your drill can turn potentially dangerous. The skinnier the hole, the deeper you can go with less danger of binding on a hand-held drill.

For large holes you need to use a stand mounted rig. These drills are attached to the wall, floor or ceiling with anchors. They are stable and secure allowing a single person to core much larger holes safely. Holes that would be impossible with a handheld concrete drill. A core rig is low-geared and works tirelessly at concrete to carve out holes over a foot in diameter. DIY drillers should be aware that if you attempt a hole this size you will be hard at word for many hours depending on your depth. Using a tool like this take preparation and forethought.  Core rigs also involve water in the process to keep friction and heat at bay. This preserves the very expensive core bits.

Core Drill Bits

Concrete Drill Bits come in many sizes and depths. Most commonly the sizes for hand-held drills are under 5 inches. Some brands do sell larger diameter bits for specialty jobs, but again, be wary. Most concrete drill bits have diamond teeth that make short work of concrete no matter how long its been curing. Regardless, it is important to keep an extremely sharp bit when coring concrete. Once the bit wear out it friction and stress on the drill increases as do the  chances of an accident. Core rigs that use wide bits on deep holes are most prone to stress and friction—and accidents. Most core rig bits allow deeper penetrations than hand-held bits. However, if the bit isn't deep enough you can purchase an extender that will allow you to go the depth you need for your utilities.

Core Drill Tutorial

Concrete Coring Tips and Hints

  • Find out exactly what utilities you are drilling the holes for before you drill. Don't just guess approximately. You always want to drill the smallest hole possible, for yourself and the structure you are drilling into. The couple of minutes it will take to learn the exact specifications will save you in the long run.This is one instance where over sizing is not a good idea.
  • Don't oversize your hole, but do oversize your drill. Too many people will attempt to hand-drill a hole that was made for core rig. Why? Because hand drills are cheaper and purchasing a core rig (or even renting a core rig) is often very expensive. Always follow the recommended uses that come with the drill and oversize your equipment when it comes to concrete. If core several holes you want to make sure your equipment can withstand the several hours of constant heat, friction and burning. Your drill will last longer as well as your back too!
  • Having doubts? hire a pro. I like do-it-yourself projects. In fact, my house has been one big do-it-yourself project for the past 5 plus years. One of the best skills I picked up doing my massive remodel is knowing when to pay someone to come forward and finish the job. I'm not saying you shouldn't drill your own concrete, but I'm just saying that sometimes its better to pay the professionals and get back to a job you feel more confident and have more fun with.


    0 of 8192 characters used
    Post Comment

    • profile image

      Dean Reese 

      3 years ago

      I had no idea that matching your job to your tool and bit was so important. My brother is involved in drilling concrete and I'm not sure if he is aware of this. I'll have to let him to know to make sure he gets it. Thanks for the help!


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)