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Trepanning (BTA)

National Shooting Sports Foundation

Trepanning is a special process used to produce holes or circular grooves by using one or more cutters and revolving them around a center or core. Typically this operation is used when conventional machines are tooled up to do deep hole drilling. Usually in such cases, the machine power is less, so solid BTA drilling is not possible.

Trepanning is also used when a solid core is required. The trepanning operation is performed on a blank workpiece without any holes. The tool geometry allows cutting only on the circular section, whereas a solid core is left in the middle. This core can later be extracted for use.

Typically only through hole applications are advisable with trepanning since the core extraction can become troublesome, as is in the case of a blind hole. The tool covers a large range of diameters up to 500mm. There are limitations to achieving smaller diameters of this process due to the geometry of the tool.

Trepanning is commonly used for such things as weight reduction in finished parts, clearance, fluid flow, work cavities, machining blanks, piston and cylinder features, and seals.

  •  
Precihole BTA Series
Precihole BTA Series
BTA Deep Hole Drilling Machines
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Precihole BVN Series
Precihole BVN Series
BTA/STS Deep Hole Drilling Machines
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Precihole PMTC Series
Precihole PMTC Series
Column-Type 5-Axis BTA Deep Hole & Gun Drilling Machines
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Absolute Machine Tools - CNC Machine Importer
  • Products
    • OEM
      Accutex EDM Fanuc Johnford LICO Mitsubishi Electric Nexturn PCI Precihole Productive Robotics QuickTECH Tongtai You Ji
      Products
      Bridge Mills Boring Mills Duplex Milling Machines EDM CNC Wire Machines EDM Die Sinkers EDM Consumables Grinders GUN DRILLING & FINISHING MACHINES Horizontal Machining Centers Lathes - Horizontal
      Mill/Turn Centers Robotics Saws Screw Machines Swiss Lathes Ultrasonic Used Machines Vertical Machining Centers Vertical Drill/Tap Centers Vertical Turning Centers & Lathes Stock Machines
      Process
      5-Axis Automation Boring Bar Processing Control Monitoring Deep Hole Drilling Deep Hole Finishing Drilling & Tapping Duplex Milling EDM Machining EDM Die Sinking Facing, Centering, and Chamfering Graphite Machining Grinding Gun Drilling
      Honing Horizontal Machining Milling Mold & Die Multitasking Production Turning Pull Reaming Rifling Robotics Saws Skiving & Burnishing Straightening Trepanning (BTA) Turning Ultrasonic
      Industry
      Aerospace Agriculture Automotive Construction & Mining Energy High Volume Production Job Shop Medical Military & Defense / Firearms
      Machines and Technology
  • USED
  • Stock
  • Services
    • EDM Training
    • Parts Request
    • Service & Preventive Maintenance Programs
    • Applications Training
    • Dealer Resources
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