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DTH Wing Bits Systems

DTH Wing Bits are used in soft, loose ground with scattered boulders, where soil and clay can collapse into the hole, slow drilling, and hinder DTH equipment withdrawal. MAXA’s PiloTec Air-lift type stable concentric casing system solves this by drilling slightly over casing diameter while advancing the casing at the same time.

  • Faster casing advance
  • Straighter holes
  • Lower wear cost
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DTH Wing Bits Drilling Method

In soft and loose ground with scattered boulders, soil and clay can collapse into the hole, slow drilling, and hinder withdrawal of the DTH equipment. MAXA’s PiloTec Air-lift type stable concentric casing system drills slightly over casing diameter and advances the casing simultaneously. The system uses a pilot bit, segments, and a locking system. The segments expand and retract concentrically to drill a straighter hole. At final depth, reverse rotation closes the segments, allowing the PiloTec casing system and DTH drill string to be withdrawn. Worn segments can be replaced separately, making maintenance more economical.

Performance Benefits

  • Straighter hole drilling through concentric segment movement
  • Simultaneous drilling and casing advancement
  • Reduced hole collapse in soft and loose ground
  • Controlled system withdrawal at final depth
  • Economical maintenance with separately replaceable segments
  • Lower disturbance to the surrounding ground

Wing Bits BT Type

PRODUCT
CODE		 RETRACTED MODE EXPANDED MODE APPLIED CASING SEG-
MENTS
TYPE
Outer Ø mm Outer Ø mm Outer Ø mm Max. pile thickness mm
219,1 mm pile
BT219/6,3t 204 237 219,1 6,3 2
BT219/10,0t 196 237 219,1 10 2
BT219/12,7t 191 237 219,1 12,7 2
BT219/12,7t/XL 191 274 219,1 12,7 2
273,0 mm pile
BT273/8,0t 255 299 273 8 2
BT273/10,0t 250 299 273 10 2
BT273/12,7t 245 293 273 12,7 2
BT273/12,7t/XL 245 328 273 12,7 2
BT273/16,0t 238 293 273 16 2
323,9 mm pile
BT324/10,0t 300 345 323,9 10 3
BT324/12,7t 295 345 323,9 12,7 3
BT324/12,7t/XL 295 378 323,9 12,7 3
BT324/16,0t 289 345 323,9 16 3
355,6 mm pile
BT356/10,0t 332 381 355,6 10 3
BT356/12,7t 327 381 355,6 12,7 3
BT356/16,0t 321 381 355,6 16 3
406,4 mm pile
BT406/12,7t 378 432 406,4 12,7 3
BT406/12,7t/XL 378 461 406,4 12,7 3
BT406/16,0t 371 432 406,4 16 3
457,2 mm pile
BT457/10,0t 434 482 457,2 10 3
BT457/12,7t 429 482 457,2 12,7 3
BT457/16,0t 422 482 457,2 16 3
508,0 mm pile
BT508/10,0t 485 535 508 10 3
BT508/12,7t 479 535 508 12,7 3
BT508/16,0t 473 535 508 16 3
558,8 mm pile
BT559/10,0t 536 589 558,8 10 3
BT559/12,7t 530 589 558,8 12,7 3
BT559/16,0t 523 589 558,8 16 3
609,6 mm pile
BT610/12,7t 581 640 609,6 12,7 3
BT610/16,0t 574 640 609,6 16 3
BT610/16,0t/XL 574 664 609,6 16 3
660,4 mm pile
BT660/12,7t 632 693 660,4 12,7 3
BT660/10,0t 625 693 660,4 16 3
711,2 mm pile
BT711/16,0t 675 743 711,2 16 3
BT711/16,0t/XL 675 766 711,2 16 3
762,0 mm pile
BT762/16,0t 726 794 762 16 3
812,8 mm pile
BT813/16,0t 776 845 812,8 16 4
BT813/16,0t/XL 776 867 812,8 16 4
914,4 mm pile
BT914/16,0t 876 955 914,4 16 4
1016 mm pile
BT1016/18,0t 972 1056 1016 18 4
BT1016/18,0t/XL 972 1071 1016 18 4
1219 mm pile
BT1219/20,0t 1170 1259 1219 20 4
BT1219/20,0t/XL 1170 1274 1219 20 4

Structure and Applications Features

  • Foundation and piling
  • Water well drilling
  • Pipe roofing
  • Ground stabilization
  • Anchoring
  • Grouting holes

Areas We Serve

We serve rig operators, site and project managers and drilling contractors across Finland, Sweden, Norway, Denmark, Switzerland, Germany, Austria, the United Kingdom, Italy, Iceland, Poland, Estonia, Latvia, Lithuania, Usa, Canada and Australia providing fast delivery, technical support, and customized DTH solutions for Northern and Central European ground conditions.

Compatible Products

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, DTH casing advancement systems, casing drilling systems and casing 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.

FAQ: DTH Wing Bits

DTH Wing Bits systems work best in relatively soft ground conditions with a fairly level bedrock surface. They are also well suited for applications where the casing bottom can be left on solid soil or directly on bedrock.

The most demanding conditions for DTH Wing Bits systems are soils with large boulders, inclined bedrock surfaces, and applications where the casing is left in soft soil. In these conditions, closing the wings can become more difficult.

If the ground conditions become too demanding for Wing Bits, changing to Ring Bits is a practical option. This is especially relevant in bouldery ground, on inclined bedrock, or when the casing cannot be left on a solid layer.

Yes. DTH Wing Bits systems are commonly used for drilling interlocked DTH pile walls. This is a standard and well-established application for the system.

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

Matias Niemeläinen

matias.niemelainen@trimach.fi
+358405892446

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