OSG

Source: OSG Official Website
https://www.osg.co.jp/en/products/drill/spec/ad-ado.html

Overview

This is OSG’s core lineup of solid carbide drills, designed for versatile, stable performance across a wide range of materials.

These drills combine several advanced features, including EgiAs coating for improved wear and heat resistance, and specialized point geometries such as the R-gash and wave cutting edge, which divide and distribute the contact area during cutting.
Together, these features provide stable performance across a wide range of materials.

The EgiAs coating helps protect the cutting edge from wear, even when machining materials that tend to generate high heat.
The R-gash and wave cutting edge designs enable stable drilling in both hard steels and softer materials like aluminum.

The lineup includes the simple AD series without internal coolant and the ADO series with through-coolant capability.
The ADO series is available in lengths from 3×D to 50×D, making it suitable for deep hole drilling.

Compatible Materials

• Low-carbon steel, medium-carbon steel, high-carbon steel
• Alloy steel, tempered steel, hardened steel (45–50 HRC)
• Stainless steel, tool steel
• Cast iron, ductile cast iron, copper alloys
• Cast aluminum alloys, titanium alloys
• Inconel, magnesium alloys

Lineup

• Carbide Drill
  • 2D（AD-2D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • 4D（AD-4D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • Solid carbide pilot drill（ADO-PLT）： Ø3.03mm - 12.03mm（approx.0.119inch - 0.474inch）
• Carbide drill with oil holes
  • 3D（ADO-3D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • 5D（ADO-5D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • 8D（ADO-8D）： Ø3.0mm - 16.0mm（approx.0.118inch - 0.630inch）
  • 10D（ADO-10D）： Ø2.0mm - 12.5mm（approx.0.079inch - 0.492inch）
  • 15D（ADO-15D）： Ø3.0mm - 12.5mm（approx.0.118inch - 0.492inch）
  • 20D（ADO-20D）： Ø3.0mm - 12.5mm（approx.0.118inch - 0.492inch）
  • 25D（ADO-25D）： Ø3.0mm - 12.5mm（approx.0.118inch - 0.492inch）
  • 30D（ADO-30D）： Ø3.0mm - 12.5mm（approx.0.118inch - 0.492inch）
  • 40D・50D（ADO-40D/ADO-50D）
• Low-carbon model
  • AD-2D Gtag： Ø5.0mm - 10.0mm（approx.0.197inch - 0.394inch）

ADO-TRS

Source: OSG Official Website
https://www.osg.co.jp/en/products/drill/spec/ado-trs.html

Overview

This solid carbide drill features a three-flute design with internal coolant holes, engineered for high-efficiency machining.
Its R-gash point geometry offers low thrust comparable to two-flute drills, while reliably breaking chips into smaller, consistent shapes.

The enlarged chip pockets ensure smooth chip evacuation—even with fine chips—minimizing chip entanglement during deep hole drilling or under poor evacuation conditions, and enabling high-feed machining.

It is suitable for a wide range of materials, from low- to high-carbon steels, alloy steels, and cast iron, with select models also capable of machining titanium alloys.
The lineup supports drilling depths from 3×D to 5×D.

Compatible Materials

• Mild steel, low-carbon steel, medium-carbon steel, high-carbon steel
• Alloy steel, tempered steel, hardened steel (45–50 HRC)
• Cast iron, ductile cast iron
• Titanium alloys

Lineup

• Lineup
  • 3D（ADO-TRS-3D）： Ø3.0mm - 20.0mm（approx.0.118inch - 0.787inch）
  • 5D（ADO-TRS-5D）： Ø3.0mm - 20.0mm（approx.0.118inch - 0.787inch）

ADO-SUS

Source: OSG Official Website
https://www.osg.co.jp/en/products/drill/spec/ado-sus.html

Overview

This drill is specifically designed to address the unique challenges of machining stainless steel and titanium alloys.

Its "MEGA COOLER" oil hole system increases coolant flow and velocity, effectively removing heat from the cutting zone. A sharp cutting edge and chip-breaking flute geometry help suppress work hardening and welding.

The ADO-SUS also features a specialized margin design and WXL coating, which offers excellent anti-adhesion properties—both of which contribute to stable, reliable machining.

The standard lineup covers drilling depths from 3×D to 8×D.

Compatible Materials

• Low-carbon steel, medium-carbon steel, high-carbon steel
• Alloy steel, stainless steel
• Cast iron, ductile cast iron
• Copper alloys, cast aluminum alloys
• Titanium alloys, magnesium alloys

Lineup

• Lineup
  • 3D（ADO-SUS-3D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • 5D（ADO-SUS-5D）： Ø2.0mm - 20.0mm（approx.0.079inch - 0.787inch）
  • 8D（ADO-SUS-8D）： Ø2.0mm - 12.0mm（approx.0.079inch - 0.472inch）

For more detailed technical information and product comparisons, visit our special feature on carbide drills for stainless steel.
The page highlights three top manufacturers with proven strengths in stainless steel machining, including in-depth coverage of recommended tools for this demanding material.

3 recommended Carbide Drills
for Stainless Steel

After-Sales Support
from OSG

To maximize product performance and reduce tooling costs, OSG offers comprehensive after-sales services on a global scale.

The regrinding service provided by OSG USA restores worn drills to their original specifications, and applying a new coating extends the tool's service life.
This service supports not only OSG tools but also those made by other manufacturers.

Additionally, OSG offers custom tool design and production to meet specific customer requirements, as well as integrated support in collaboration with its in-house coating division—delivering a full-scale tool reconditioning solution.

Company Information

Address	620 Stetson Avenue, St. Charles, IL 60174, USA
Phone Number	800-837-2223
Official Website	https://osgtool.com/

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