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2023-10-19 12:00:00 By marketing11

How to drill Thick and Large Diameter Holes?

Recommended Articles Gas Pipes Ship Consrtrution Construction Thick Metal Sheets Tia Coating Tin Coating Weldon Shank Magnetic drilling machines Step drills Annular cutters TCT



Drilling through metal can be challenging at the best of times, but trying to create a large diameter hole can present even more of a dilemma, especially in a substantial steel beam or plate.

HCLF Annular Cutter with a drill depth of 10" (250 mm) are equipped with a spiral flute which creates optimum chip removal and makes seizure next to impossible. These carbide cutting tools are used to drill in hardened materials such as thick metal sheet.

HCLF Annular Cutter 250 mm cutting depth are less susceptible to breakage than High Speed ​​Steel Cutters, especially in larger diameters and lengths.





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Highlights and Features of the HCLF Annular Cutter
Clean Drilled Hole
How to drill thick metal sheet
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[ Highlights and Features of the HCLF Annular Cutter ]



Drilling holes on thick and large diameter holes is a specialist task and requires the right equipment and setup.

The correct cutting tools are also required, and 3Keego have developed a generation of cutting tools for exactly this purpose.

They are also tipped with individually brazed cutting teeth of the highest quality carbide and have been designed with an elaborate cutting geometry which results in faster, quieter, easier drilling and chatter free performance.

This quality product is suitable for all metals, such as thick steel and cast iron, but was specially developed for harder materials with thick and large diameter holes.

Perfect for fabrication, steelworks and metal modification industries, or any job that requires a fast and reliable tool that cuts through the harshest of metals.

  • Geometry Designed Teeth

    • The fluted shape, for chip collection and faster removal, can avoid overheating to extend the service life of HCLF Annular Cutter.

    Besides, if the chips can be removed over the flute quickly, the drilling process will also become faster.



  • Suitable Machine
    • The best suitable drilling machine is a magnetic drilling machine.


  • Weldon Shank
    • Weldon shank fits in any magnetic drilling machine (manual type).

    Clean Drilled Hole?


    Drilling a hole on thick materials, requires a cutting tool that designed specificaly to this kind of job.



    [ Application of HCLF Annular Cutter ]

    For Thick metal sheets

    Metal sheet up to 250mm depth, and up 150mm diameter hole.


    [Advantages of HCLF Annular Cutter]

  • Cuts material up to 250mm depth


  • Perfect for use on heavy equipment & machinery


  • Capable of providing a service life


  • Fitted with a 34L Weldon shank to fit most brands of Magnetic drills with High Torque and low running speeds.



    • [How to drill thick metal sheet?]

    Summing up the topic, the right method can make a real difference in how smoothly the operation goes. To systematize knowledge before drilling thick metal sheet it's worth remembering three important tips:

    1. Proper annular cutter like HCLF for thick metal plate
    The annular cutter to drill thick metal plate is Tungsten Carbide Tipped annular cutter. Thanks to their properties they can easily cut through without damaging the surface. Sintered and finished carbide has a combination of compressive strength, extreme hot hardness at high temperatures, and resistance to abrasion, corrosion, and thermal shock. These are important factors in drilling hard and thick materials because the friction of metal against metal can produce high temperatures. That damage the material or the drill bit.

    2. Set the right rpm and keep an eye on the chips
    The set the rpm’s for metal sheet is usually about 50% less than mild steel. The trick is to use slow rpm and more feed pressure than is used with steel. An annoying, high squealing sound means that the rpm is too fast. Keep an eye on chips. When they are gold or blue, the drilling machine is running too fast. Drill swarf should come off in long spirals, not small chips.

    3. Remember about coolant
    Coolant is used to keep the cutter cool. During drilling through metal sheet heat is absorbed into hole cutters. Due to generated extreme heat, cutters quickly become dull or softened. It's recommended to place a few drops of cutting oil on the surface of the stainless steel before beginning to drill. Periodically add more oil drops, until you have drilled completely through the stainless steel.


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