Technical Drilling Specifications

Complex drilling operations demand precision and accuracy. Gundrilling provides a specialized drilling method that achieves tight tolerances and extreme lengths using a range of materials. Many applications and industries benefit from the challenging hole types produced in gundrilling manufacturing. View technical drilling specifications for American Machine & Gundrilling (AMG) capabilities.

Gundrilling Specifications

Gundrilling offers a premium drilling method for complex and challenging hole types. The manufacturing process for components varies, as gundrilling manufacturing is individualized to each produced part. Technical drilling specifications and capabilities for gundrilling can achieve hole types with:

  • 8 in to 30 in Drill Depth for O.D. Less than 1/4”
  • 30 in to 120 in Drill Depth for O.D. from 1/4” to 1/2”
  • 180 in to 360 in Drill Depth for O.D. Greater than 1/2”
  • Hole Diameters of 0.050” to 2.75”
  • Bolt Circle Diameters up to 36 in
  • Unlimited Number of Bored Holes
  • Maximum Part Weight up to 20,000 lbs.
  • Tolerances within 0.0003 in
  • Surface Finishes of 16 to 20 µin

Producing complex hole types with traditional drilling operations can be challenging. Gundrilling can create a variety of complicated bores with complete roundness, straightness, and concentricity. Our processes are highly repeatable for large production runs, delivering accuracy and precision every time. Hole types achieved by gundrilling include:

Custom Gundrilling Equipment

Due to the specialized nature of gundrilling, we utilize modified equipment to produce challenging hole types. Our individualized processes use CNC- and NC-controlled machines with a 3-machine axis. Specialized in-house fixturing and tooling allow for complex drilling techniques, employing a variety of chuck fixtures, including three-, four-, and six-jaw technology to produce perfectly round, straight, and repeatable bores with precision.

Materials Used in Gundrilling

Various materials can be used in gundrilling manufacturing. Our processes work with standard materials, exotic and precious metals, plastic polymers, and everyday materials like wood, fiberglass, and composites. In traditional drilling operations, many materials may require long production times or not achieve the intended result. Gundrilling produces high-quality hole types in a wide range of materials up to 50 R/c. Material offerings include industry-specific requirements like aircraft-grade aluminum, medical stainless, and heat-treated stainless, as well as exotic alloys like molybdenum, Monel, Kovar, and more.

Inspections, Testing & Value-Added Services

In addition to gundrilling processes, we complete product testing and inspections to ensure your part has been machined correctly to your specifications. Expert technicians conduct drift, hole walk, size, ultrasound, and visual inspections, plus hardness and laser thermal product testing to certify that the machined component meets precision and accuracy standards. We also proudly offer engineering and creative guidance in creating your desired product.

Our operations accommodate various value-added fabrication services to produce a complete component. Secondary machining services include:

  • Grinding
  • Honing
  • Sawing
  • Heat Treatments
  • Painting
  • Pressing
  • Sanding
  • Turning

We are dedicated to getting you the best product possible and partner with various fabricators throughout the Midwest and nationwide to help achieve your goals.

Contact AMG for High-Quality Gundrilling Fabrications

AMG is a premium gundrilling fabricator with decades of experience and technical expertise. Utilizing state-of-the-art custom equipment, our gundrilling operations produce exceptionally round and straight hole types. We aim to meet or exceed expectations for drilling specifications, with the ability to generate diameters as small as thousandths of an inch. With additional secondary production services and other value-added services like engineering guidance, we are confident we can produce a high-quality component to your requirements. Contact us with any questions or request a quote for a custom solution today.