Deep Hole Drilling Tube
Production CharacteristicsThe deep hole drilling tube is a core component in deep hole drilling systems, designed to deliver high torque transmission, precise coolant supply, and reliable chip evacuation under extreme depth-to-diameter ratios.
Manufactured from premium alloy steel and processed with advanced heat treatment and precision machining, our drilling tubes provide exceptional rigidity, concentricity, and operational stability for demanding deep hole applications.
In deep hole machining, drilling tube rigidity and internal coolant performance are critical to bore accuracy and process stability. Our deep hole drilling tubes are engineered to maintain mechanical stability under high rotational speeds and high-pressure coolant conditions
By optimizing tube geometry and internal bore precision, the drilling tube effectively reduces vibration, deflection, and abnormal tool wear, ensuring consistent bore quality and reliable long-term operation.
Compatible with BTA deep hole drilling, gun drilling, and trepanning systems, these drilling tubes are widely used in heavy-duty and high-precision industrial applications.
| Drillingtube(mm)OD | ID(mm) | BTAdiamterrange(mm) |
| Φ17 | 11.5 | 18.41-20.0 |
| Φ18 | 12 | 20.01-21.8 |
| Φ20 | 13 | 21.81-24.8 |
| Φ22 | 15.5 | 24.11-26.4 |
| Φ24 | 15.5 | 26.41-28.7 |
| Φ26 | 17 | 28.71-31.00 |
| Φ28 | 18.5 | 31.01-33.3 |
| Φ30 | 20 | 33.31-36.2 |
| Φ33 | 23 | 36.21-39.6 |
| Φ36 | 25.5 | 39.61-43.00 |
| Φ39 | 28 | 43.01-47.00 |
| Φ43 | 31 | 47.01-51.7 |
| Φ47 | 35 | 51.71-56.2 |
| Φ51 | 36 | 56.21-64.5 |
| Φ56 | 39 | 64.51-65.5 |
| Φ62 | 45 | 65.51-72.8 |
| Φ68 | 48 | 72.81-79.8 |
| Φ75 | 55 | 79.81-86.8 |
| Φ82 | 60 | 86.81-1061.6 |
| Φ94 | 72 | 101.6-116 |
| Φ100 | 82 | 116.1-1250 |
| Φ130 | 122 | 125.1-160 |
| Φ160 | 152 | 161-200 |
Key Features
•High-Strength Alloy Steel Construction
Optimized heat treatment ensures superior torsional strength and bending rigidity for long overhang drilling conditions.
•Low Deflection Tube Design
Engineered wall thickness ratio minimizes deflection and hole deviation while maintaining sufficient internal coolant flow.
•Precision Internal Coolant Channel
Deep-hole machined and finish-processed internal bore guarantees stable high-pressure coolant delivery to the cutting zone.
•Vibration-Reduced Performance
Structural optimization suppresses chatter and vibration, improving bore straightness and surface finish.
•High Concentricity & Dynamic Balance
Strict concentricity control and dynamic balancing reduce runout during high-speed rotation and extend tool life.
•Reliable Connection Interfaces
Threaded, welded, or quick-change connections designed for long-term cyclic loads and repeatable positioning accuracy.
•Fully Customizable
Tube diameter, length, connection type, and coolant configuration can be customized to match different machines and applications.
Typical Applications
•Hydraulic cylinders
•Automotive shafts and drivetrain components
•Construction and heavy machinery
•Energy and power generation equipment
•Large precision structural parts
Technical Parameters (Customizable)
•Depth-to-Diameter Ratio (L/D): ≥ 10 up to 100
•Coolant System: High-pressure internal coolant
•Workpiece Materials: Carbon steel, alloy steel, stainless steel, cast iron
•Machining Mode: Continuous drilling, semi-finishing, finishing