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DTH Drill Bits and Casing Ring Bits

Tri-Mach’s DTH (Down-The-Hole) drill bits and casing systems represent the pinnacle of drilling technology, engineered to tackle the most challenging conditions and penetrate through even hardest rock formations with unparalleled efficiency.

When it comes to achieving optimal drilling performance, the quality of the DTH drill bits becomes paramount. These drill bits are not just any tools; they are the heart of the drilling operation, designed to withstand the rigorous demands of drilling through tough, unyielding soil formations.

At Tri-Mach Nordic, we pride ourselves on designing and manufacturing the highest caliber DTH drill bits and ring bit systems available on the market. Our products are conceived and crafted by seasoned drillers who understand the intricate demands of the drilling industry. This insider knowledge ensures that every DTH drill bit and ring bit system we produce meets the highest standards of durability, performance, and efficiency.

Why Choose Our DTH Drill Bits and DTH Piling Solutions?

  1. Superior Quality and Durability: Our DTH drill bits are made from premium materials, ensuring they can withstand the toughest drilling conditions and offer longer service life.
  1. Advanced Design: Leveraging cutting-edge technology and innovative design, our DTH drill bits provide superior penetration rates, making them ideal for DTH piling and other demanding drilling applications.
  1. Customized Solutions: We understand that every drilling project has unique requirements. That’s why we offer customized DTH drill bit solutions tailored to your specific needs, ensuring maximum efficiency and performance.
  1. Expertise and Support: Our seasoned team brings deep industry experience, offering unmatched client support and guidance. Alongside our top-tier DTH drill bits and ring bit systems, we provide essential maintenance services that can extend your tools’ lifespan by up to 20-30%. This not only ensures optimal performance but also maximizes your investment’s value by reducing the need for replacements.

Tri-Mach provides the best tools for the job

Whether you are involved in construction, mining, or any other industry that requires reliable and efficient drilling through hard rock, our DTH drill bits and ring bit systems are designed to deliver. Our commitment to quality, innovation, and customer satisfaction makes us the go-to choice for professionals seeking the best DTH piling and drilling solutions.

Explore our range of DTH drill bits and discover how our cutting-edge drilling solutions can enhance your operational efficiency and project outcomes. You can trust us to provide the tools you need to tackle the toughest drilling challenges with confidence.

DTH Drill Bits & Casing Ring Bits – Product Range


  • Yksittäispaalut:
    • 168mm – 1524mm
  • RD-Paaluseinä:
    • 273mm – 1220mm

Yleisimmistä halkaisijoista poikkeavat paalukoot kysyttäessä (esimerkiksi 762mm tai 1540mm).

Tuotteemme sisältävät porauspilotit, rengasterät, maakengät ja integroidut rengasterät kaikissa halkaisijoissa. Patentoitu Radial Flush - porausmenetelmämme ei häiritse ympäröivää maaperää ja mahdollistaa korkeamman pilotin käyttöiän. Tämä tarkoittaa enemmän porausmetrejä perinteisiin pilottiratkaisuihin verrattuna.

Tri-Mach tarjoaa asiakkailleen laajaa työmaakonsultaatiota. Olemme sitoutuneet nostamaan asiakkaiden tuotantotehokkuuden uudelle tasolle.

FAQ: DTH-Drill Bits for Casing Drilling

Can you explain different terminology for DTH Drill Bits?

DTH Drill Bit is a term that is generally used for all drilling bits in DTH (Down-The-Hole). They could include for example:

  • DTH-Button Bit / DTH-Rock Bit = DTH Drill Bit designed to drill a rock hole without casing.
  • DTH-Pilot Bit = DTH-Drill Bit that is designed to drill casings / DTH-Piles. Normally used together with Ring Bits.
  • DTH-Wing Bit = DTH-Drill Bit that is used to drill casings without the Ring Bit.
  • DTH-Hole Opener = DTH Drill Bit that is used to enlarge existing rock hole diameters

Where are DTH Casing Systems used?

  • DTH-Casing Systems (Ring Bits) are used in casing advancement. Ring Bit makes a slightly larger diameter hole than the diameter of the drilled casing. So, casing has room to advance towards required drilling depth.

What does DTH-Piling / DTH-Drilled Piles mean?

  • DTH-Drilled Piles are steel casings that have been drilled using the Down-The-Hole hammer (DTH). Piles are normally drilled through soil layers and into the bedrock. After drilling, casings can be concreted. Eventually, the DTH-Drilled Piles work as load-bearing piles for foundation structures.

Can I use different Ring Bit-types with the same DTH-Pilot Bit?

  • With our design, it is possible to drill all types of ring bits with the same DTH-Pilot Bit. This includes for example Single Pile Ring Bits (Solitary + Integrated) and Pile Wall Ring Bits (Solitary+Integrated)
  • Also, Heavy Duty Ring Bits are drilled with the same DTH-Pilot Bit.

What is a Solitary Ring Bit?

  • Also known as Loose Ring Bit. It means it is not welded/attached into the drilled casing. So, it is loose and only connected to the DTH-Pilot Bit with bayonet connection.

What is an Integrated Ring Bit?

  • Integrated Ring Bits are attached to the drilled casing by a welded “Lock Ring” that prevents the Ring Bit from escaping, if the DTH-Pilot Bit is lifted from the casing.  

Benefits of the Integrated Ring Bit System?

  • Integrated Ring Bit systems are designed so, that it is easier to interrupt process in the middle of drilling. Pilot bit can be taken out and put back in later to continue drilling. Integrated system prevents the Ring Bit from moving out while the pilot is lifted from the casing.   
  •  In harbor projects, Integrated Ring Bits offer the possibility of loading casings underwater. This has benefits in production rates, since it minimizes the casing loading times.

In our project, we have piles with really challenging geotechnical conditions. Can you produce a Ring Bit that works even in these tough conditions?

  • Yes. We design project-specific custom models for tough conditions. Lately, this has been really popular with great results!

What is the difference between DTH Single Pile Ring Bit and DTH Pile Wall – Ring Bit?

  • For DTH-Pile Wall, the Ring Bit outside diameter has to be approx. 55mm larger than the Single Pile Ring Bit. The larger outside diameter makes room for both Male and Female interlocks of the DTH-Drilled Pile Wall (sometimes also called RD-Pile Wall).  
  • Inside of the Ring Bit is the same in both options. This makes it possible to use the same pilotbit for both Ring Bits.

Do you have any further questions? Please feel free to contact Matias!

Matias Niemeläinen

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