OSG

OSG’s solid carbide drills feature specialized point geometries, flute designs, and coatings tailored to each series,contributing to stable performance in high-volume production.

This article summarizes the key features and recommended applications of OSG’s solid carbide drills by series.

Recommended
Applications for OSG

These drills are ideal for high-volume production environments where stable operation is essential. They excel in machining difficult-to-cut materials such as stainless steel and titanium alloys, which are commonly used in automotive and aerospace components.

In metal drilling, two major factors that threaten tool life and machining quality are heat concentrated at the cutting edge and chips that are difficult to evacuate. Many OSG solid carbide drill models are available with through-coolant capabilities, effectively addressing both heat generation and chip evacuation.

Through-coolant systems deliver coolant directly to the cutting edge—the main source of heat—providing efficient cooling and reducing thermal damage to the tool. At the same time, internal coolant pressure helps eject chips smoothly from the hole, significantly lowering the risk of clogging.

*Results may vary depending on the product and machining conditions, including spindle speed, feed rate, coolant supply, and machine rigidity.

How to Choose OSG Carbide Drills

General Drilling

Recommended: AD / ADO Series

If you need one drill family for a wide range of materials, the AD / ADO series is OSG’s core solid carbide drill lineup. It supports stable drilling in steels, stainless steel, cast iron, aluminum alloys, titanium alloys, Inconel, and other materials.

EgiAs coating improves wear and heat resistance, while the R-gash and wave cutting edge designs help stabilize cutting in both hard steels and softer materials such as aluminum.

Choose the AD series for simple drilling without internal coolant. Choose the ADO series when through-coolant capability or deeper drilling is required, with options from 3×D to 50×D.

Best Suited For

• General-purpose drilling
• Steel and stainless steel
• Cast iron and ductile cast iron
• Aluminum, copper, and magnesium alloys
• Titanium alloys and Inconel
• Deep-hole drilling with through-coolant models

Available Lineup

• AD-2D Series: Ø2.0–20.0 mm (approx. 0.079–0.787")
• AD-4D Series: Ø2.0–20.0 mm (approx. 0.079–0.787")
• ADO-PLT Pilot Drill: Ø3.03–12.03 mm (approx. 0.119–0.474")
• ADO-3D / 5D Series: Ø2.0–20.0 mm (approx. 0.079–0.787")
• ADO-8D Series: Ø3.0–16.0 mm (approx. 0.118–0.630")
• ADO-10D Series: Ø2.0–12.5 mm (approx. 0.079–0.492")
• ADO-15D / 20D / 25D / 30D Series: Ø3.0–12.5 mm (approx. 0.118–0.492")
• ADO-40D / 50D Series: Deep-hole drilling models
• AD-2D Gtag: Ø5.0–10.0 mm (approx. 0.197–0.394"), low-carbon steel model

High-Feed Drilling

Recommended: ADO-TRS Series

If your priority is high-efficiency drilling, the ADO-TRS series uses a three-flute design with internal coolant holes to support high-feed machining.

Its R-gash point geometry reduces thrust while breaking chips into smaller, more consistent shapes. Enlarged chip pockets improve chip evacuation, helping reduce chip entanglement during deep-hole drilling or under poor evacuation conditions.

The series is suitable for steels, cast iron, ductile cast iron, and select titanium alloy applications, with 3×D and 5×D options.

Best Suited For

• High-feed drilling
• Low- to high-carbon steel
• Alloy steel and tempered steel
• Hardened steel up to 45–50 HRC
• Cast iron and ductile cast iron
• Applications where chip evacuation is a concern

Available Lineup

• ADO-TRS-3D Series: Ø3.0–20.0 mm (approx. 0.118–0.787")
• ADO-TRS-5D Series: Ø3.0–20.0 mm (approx. 0.118–0.787")

Stainless and Titanium

Recommended: ADO-SUS Series

If you mainly drill stainless steel or titanium alloys, the ADO-SUS series is designed to control heat, work hardening, and welding during machining.

The MEGA COOLER oil hole system increases coolant flow and velocity to remove heat from the cutting zone. A sharp cutting edge and chip-breaking flute geometry help maintain stable cutting in difficult materials.

The specialized margin design and WXL coating improve anti-adhesion performance, supporting reliable machining from 3×D to 8×D.

Best Suited For

• Stainless steel drilling
• Titanium alloy drilling
• Applications prone to work hardening
• Operations where welding or adhesion must be reduced
• Steel, cast iron, copper alloys, and aluminum alloys
• Drilling depths from 3×D to 8×D

Available Lineup

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

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.

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/