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Large-Diameter Deep Hole Drilling
Single-Tube BTA System for Large-Diameter Deep Hole Drilling
RuidCNC's BTA (Boring and Trepanning Association) deep hole drilling systems are designed for large-diameter, deep-hole applications where conventional gun drilling reaches its limits. The single-tube system provides efficient chip evacuation and superior hole quality for diameters up to Ø150mm.
BTA Deep Hole Drilling Systems
BTA drilling is the preferred method for large-diameter deep hole drilling where diameter, depth, or material removal rate exceeds the practical limits of gun drilling. RuidCNC’s BTA systems are built for heavy-duty industrial applications including oil and gas, power generation, and heavy equipment manufacturing.
The single-tube system design provides efficient chip evacuation through the drill tube, enabling clean, accurate holes at depths that would be challenging or impossible with conventional drilling methods.
Core Capabilities
Key Features & Capabilities
Single-Tube Chip Evacuation
High-pressure coolant is delivered through the annulus between the drill tube and the hole wall, flushing chips through the tube's internal channel.
Large Diameter Capability
BTA drilling handles diameters from Ø12mm to Ø150mm with depth-to-diameter ratios exceeding 100:1.
Superior Surface Finish
BTA drilling produces excellent surface finish (Ra 1.6µm) and tight dimensional accuracy in a single pass.
Multi-Operation Versatility
Same machine platform supports BTA drilling, trepanning, counterboring, and skiving/roller burnishing with tooling changes.
Specifications
Technical Specifications
| Drilling Diameter | Ø12 – Ø150 mm |
| Max Drilling Depth | Up to 6000 mm |
| Spindle Power | 15 – 75 kW (depending on configuration) |
| Spindle Speed | 0 – 3000 rpm |
| Surface Finish | Ra 1.6 – 3.2 µm (as-drilled) |
| Coolant Pressure | Up to 40 bar (BTA system) |
| Certification | ISO9001, CE Certified |
Materials
Available Materials
Applications
Common Applications
Heat exchanger tube sheet drilling
Hydraulic cylinder barrel drilling
Roller and shaft center line drilling
Pressure vessel nozzle drilling
Oil and gas exploration equipment components
Shipbuilding shaft and rudder stock drilling
Process
How It Works
Application Review
We assess your drilling requirements — diameter, depth, material, tolerance, and production volume.
System Design
BTA system configured with appropriate spindle power, coolant volume, fixturing, and tooling for your application.
Machine Construction
Heavy-duty machine built with the rigid spindle and guide bushing system required for BTA drilling stability.
Process Qualification
Sample drilling conducted to validate hole straightness, surface finish, and dimensional accuracy.
Delivery & Support
Machine delivered, installed, and commissioned. Training provided on BTA-specific operating procedures.
Why Choose RuidCNC
Core Advantages
Exceptional Depth Capacity
BTA drilling achieves depth-to-diameter ratios exceeding 100:1 with excellent straightness and surface finish.
High Material Removal Rate
The BTA process removes material significantly faster than gun drilling for larger diameter holes.
Single-Pass Efficiency
Drills to full depth in a single pass — no pecking required. Reduces cycle time compared to conventional methods.
Versatile Process
Same machine can perform BTA drilling, trepanning, counterboring, and roller burnishing with appropriate tooling.
Ready to Optimize Your Deep Hole Drilling?
Share your application requirements with our engineering team and receive a tailored machine recommendation and quote within 24 hours.