ADOX

High-performance coolant-through carbide drill

Takahiro Yamamoto | OSG Corporation Product Development Engineer

OSG has expanded its flagship ADO drill series with the launch of the ADOX, a high-performance carbide drill featuring internal coolant holes. Engineered with OSG’s proprietary “MEGA COOLER” coolant hole design, the ADOX delivers enhanced drilling performance and greater versatility across a broad range of machining applications. In addition to its technical capabilities, the ADOX supports environmentally conscious manufacturing by reducing operational impact.

The ADOX lineup is available in the following size ranges:

• ADOX-3D/5D/8D: diameter 2 to 6 mm
• ADOX-10D: diameter 2.4 to 6 mm
• ADOX-15D/20D/25D/30D: diameter 2.3 to 6 mm

Features and Benefits
Building on the ADO series’ hallmark R Gash design, the ADOX introduces a newly optimized coolant hole geometry. By enlarging the cross-sectional area of the coolant holes, the drill maximizes the volume of cutting fluid discharged from the tool tip, improving tool life, machining stability, and overall efficiency. The coolant hole configuration is precisely engineered to complement the R Gash, allowing the drill to fully capitalize on its cutting performance.

The ADOX is capable of machining stainless steel—typically a challenge for general-purpose drills—making it suitable for a wide range of materials with a single tool, thereby enabling tool consolidation. The MEGA COOLER design ensures reliable coolant discharge even under low pressure, with oil-based cutting fluids, and in small-diameter applications, consistently delivering high performance.

Cutting Data

1. Small-Diameter Stainless Steel Machining with Low Coolant Pressure

Conventional drills often fail to deliver sufficient coolant flow in diameters below 3 mm under low pressure, resulting in shortened tool life. The ADOX addresses this by maintaining adequate coolant flow, achieving more than three times the durability of conventional tools.

Figure 1. Long tool life achieved through sufficient coolant output at low pressure.

2. Machining with Oil-Based Cutting Fluids

Due to the high viscosity of oil-based cutting fluids, there is a tendency for insufficient fluid delivery, which can impede chip evacuation and result in inconsistent tool life. The ADOX demonstrates stable performance and prolonged tool life, even under these challenging conditions.

Figure 2. Machining high-carbon chromium bearing steel.

3. Reduced Power Consumption and Stable Performance at Lower Coolant Pressure

MEGA COOLER not only boosts performance through increased coolant discharge but also enables comparable flow rates at lower pressures. This significantly reduces energy consumption from coolant pumps, which are among the highest power consumers in machining operations.

ADOX maintains high tool performance even at low coolant pressures, thanks to the R Gash’s low resistance and vibration-reducing design, which also aids in chip breaking and contributes to longer tool life. These features support ADOX’s environmental performance by lowering energy usage.

Figure 3. Comparison of power consumption of high-pressure coolant pumps at different coolant pressures.

4. Increased Coolant Discharge for Higher Efficiency and Longer Tool Life

In environments with moderate to high coolant pressure, increased discharge improves cooling, lubrication, and chip evacuation at the cutting edge. This results in higher machining efficiency and longer tool life compared to conventional drills.

Figure 4. High efficiency and long tool life in 30D deep hole drilling.

Conclusion

The ADOX drill elevates the performance of the ADO series’ R Gash feature while offering broad versatility for difficult-to-machine materials such as stainless steel. It excels in challenging environments—including small-diameter machining, low coolant pressure, and oil-based cutting fluids—and contributes to reduced environmental impact. OSG will continue to expand the ADOX series, including the development of models beyond 30D.

For more information on OSG’s ADOX high-performance coolant-through carbide drill