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Prepare the core drill and job site
Before actually operating the core drill, it is important to prepare the job site and ensure the drill is ready for use. You will want to:
Check for alignment and possible binding of moving parts, mounting, and any other conditions that may affect core drill operation. Do not use the core drill if it shows any signs of damage.
Read and fully understand the operating manual.
Check the power supply's flow and pressure output against the core drill's requirements.
Check for live electrical wiring near the work site or embedded in the material being drilled.
If drilling through a wall, check both sides for possible obstructions.
Before drilling through a floor, provide protection for all personnel and materials below the work area. Cores generally drop from the bit at the completion of the hole.
Ensure all personnel is using the appropriate safety equipment.
Clear the working area of all unauthorized personnel. Place barricades or secure the area so that no person can be injured.
Anchoring a core drill
A core drill can typically be bolt anchored or ceiling jack anchored to the floor or bolt anchored to the wall.
Measure the distance from the center of the anchor bolt slot in the base to the center of the drill spindle.
Mark from the center of the hole on the floor to be drilled to the spot where the anchor bolt hole will be drilled.
Drill and set the anchor bolt. Then place core drill over anchor hole and hand tighten the bolt.
Secure the core drill by tightening the anchor bolt.
Installing a drill bit
Before installing the drill bit, ensure that neither the bit nor the core drill is hot. What's more, always make sure to wear protective gloves when handling, installing, and removing core drill bits.
Next, remove any dirt or contamination that may have accumulated on either the bit or drill spindle. Once you do that, you can begin to thread the drill bit onto the drill spindle and tighten it securely with a bit wrench.
Operating the core drill
Once you have done the steps above, you are ready to operate the core drill. During this process, you will want to do the following:
Check the hole alignment by lowering the bit with the feed handle until the bit is about 1/2 inch from the concrete. It is important to ensure the bit is not resting on the concrete when starting the core drill.
Make sure to always check the manufacturer's recommendation for drill speed.
Keep all body parts away from all moving parts of the core drill while in operation.
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Selecting the right Diamond Drills/Bits for your application is key to obtaining desired diamond drilling results. Using the Right Diamond Drill will help you Save Time & Money. As well as avoid an unnecessary trial & error process. The article below was designed for diamond drill/bit users of all skill and experience levels. Ranging from beginner (novice) to experienced manufacturing engineer, researcher, contractor or hobby enthusiast. The following are some factors to consider when selecting the right diamond drill for your application.
Today's growing variety and ever changing materials, Manufacturers, R & D facilities, hobbyists and everyone else involved in diamond drilling encounter wide variety of applications and challenges. The ever increasing variety of advanced, new generation, ultra hard, composite, micro, and exotic materials transform the way we look at diamond drilling. And set many age old diamond drills/bits and drilling methods obsolete. New materials require different technology and methods.
And although, today's market place offers the Manufacturing Engineer, R & D Scientist, Hobby Enthusiast, Contractor and Home Owner hundreds of choices of diamond drills/bits, accessories, and equipment. It offers little advice on how the user can implement these tools to accomplish their specific objectives. Many users still spend days and even weeks, trying different diamond drills/bits, and experimenting with different types of drilling equipment. An expensive and time consuming trial and error process, which can be avoided with proper understanding of your material and objectives you need to accomplish. Proper preparation, attention to detail, and following basic diamond drilling technique can make the difference in the success of your diamond drilling operation.
Material to Be Drilled
● Hardness of Material – Materials you are planning to drill will have a large impact in the types of diamond drills, equipment, and accessories you will be able to use. If you are drilling ultra hard materials such as sapphire, alumina, other types of advanced ceramics, high metallic content materials, precious and natural stone. It is generally recommended that you use a sintered (metal bonded) diamond drill. However, if you are drilling softer and less expensive materials such as glass, composites, soft stone and tile, an electroplated (nickel bonded) diamond drill may be a better and more cost effective solution. As a rule of thumb harder materials require softer bond, to drill faster and freer. While softer and abrasive materials require a harder bond, to last longer. Material Hardness is defined as the materials capability to resist deformation. All materials are classified by their scale of hardness. Material hardness is measured by many different hardness scales such as Mohs, Vickers, Knoop and other scales of hardness. Further information on determining and understanding hardness of your material is available in this article below.
● How expensive is your material - Material cost will play an important role in selection of the right diamond drill/bit for your application. if the material you are planning to drill is precious, valuable, or expensive. Diamond drill/bit cost will play a minor role in your drilling operation. It is suggested that you obtain a thin wall diamond core drill to minimize material loss and deformation. It's always a good idea to have some type of an estimate of target cost and quality per hole.
● Material Thickness (maximum drilling depth) – The thicker the material you are planning to drill, the greater amount of coolant and pressure is required. Applications requiring you to drill over 1" (25.4mm) should be tread in a different way. We recommend running coolants from multiple directions. Through drill center, from side of drill, as well as drilling submerged in coolant. This will insure maximum amount of coolant and lubrication reaching your drilling zone. Running high pressure of coolant through center of your diamond drill/bit by using a water swivel adapter is highly recommended for drilling material over 1" (25.4mm) Thick. Longer Drilling depths may require drilling in several steps and using more than one diamond core drill / diamond drill bit.
● Material Geometry & Density - Each material has different density, hardness, composition. For this reason a diamond drills/bits and techniques that may work on one material, may not work on another material. To obtain optimum drilling results, each diamond drill should be ideally made to factor in the unique differences and properties of each material. Shape, Size, Diameter, Hardness, and Brittleness of your material will affect not only your diamond drill/bit selection, but your choice clamping methods (holding your material in place), drilling equipment, speeds & feeds you can use.
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