Trepanning Services

Trepanning Services: Precision Core Removal and Large Diameter Hole Solutions

Hole Specialists, Inc. is an industry leader in gun drilling, deep hole drilling, pull bore, trepan, and honing services since 1993. At Hole Specialists, Inc., we combine these core capabilities with state-of-the-art equipment, rigorous quality control, and decades of expertise to deliver superior results for our clients. Our comprehensive quality management system ensure consistent excellence across all services.

Trepanning is an advanced cutting process that creates large diameter holes while preserving the core material. Unlike conventional drilling that converts all material to chips, trepanning cuts a ring-shaped groove, leaving a solid core. This process is more efficient for large holes and allows for material analysis of the core sample. Trepanning is crucial for applications in pressure vessel manufacturing, material testing, and large-scale industrial equipment.

End Applications

Large diameter holes in solid materials
Core sample extraction
Pressure vessel openings
Industrial equipment modification
Heavy machinery components
Large valve bodies
Forging and casting modifications
Test specimen extraction
Material analysis cores
Custom machined components

Industries We Serve

Military

Our trepanning expertise supports defense manufacturing with precise core removal and large diameter holes for equipment components. We maintain strict security protocols and military specifications.

Automotive

We provide trepanning services for engine block modification, test specimen extraction, and prototype development. Our capabilities support both research and production needs.

Food Processing

Our trepanning services create precise openings in food processing equipment, meeting FDA standards and sanitary requirements for process modifications.

Printing

We serve the printing industry with precisely machined openings for equipment modifications and upgrades to existing systems.

Mold Manufacturing

Our trepanning capabilities support large-scale mold modification and core extraction for analysis and testing.

Steel Industry

We support steel manufacturers with trepanning services for material testing, equipment modification, and structural components.

Manufacturing

Our services support various manufacturing operations, including equipment modification and material testing requiring core extraction.

Composites

We provide trepanning for composite material testing and modification of composite manufacturing equipment.

Medical

Our trepanning meets strict medical industry standards for equipment modification and specialized component manufacturing.

Oil & Gas

We support the energy sector with trepanning services for pressure vessel modifications, pipeline components, and testing requirements.

Job Shops

We collaborate with machine shops to provide specialized trepanning services that complement their existing capabilities.

Technical Capabilities

Diameter range: 2.000″ to 24.000″
Maximum depth: 60 inches
Core preservation capability
Precision positioning systems
Advanced cooling systems
Core extraction systems

Quality Certifications

Quality Management

ASME Certification

Quality Control Equipment

Quality Documentation

Frequently Asked Questions

What is trepanning?

Trepanning is a specialized machining process that creates large diameter holes while preserving the core material. It’s particularly useful for material testing and creating large openings in solid materials.

What are the advantages of trepanning?

Trepanning preserves the core material, requires less power than solid drilling, and creates precise large diameter holes. It’s ideal for applications requiring material analysis or large openings.

What materials can be trepanned?

We can trepan most engineering materials including various grades of steel, stainless steel, aluminum, and exotic alloys.

How does trepanning compare to conventional hole making?

Trepanning is more efficient for large holes than conventional drilling and allows for core preservation, which is essential for material testing and analysis.

What tolerances can be achieved with trepanning?

We typically achieve diameter tolerances of ±0.005″ and positional accuracies of ±0.002″ depending on the application.

Trepanning Services