Drill America 5-Piece HSS Extension Drill Bit Set 1/4-1/2″ x 6″ POU

Description

Product Overview

The Drill America POU Series 5‑piece high speed steel (HSS) extension drill bit set is engineered for professionals who demand precision, durability, and reach in demanding metalworking environments. Each bit measures a total length of 6 inches, providing the extra reach required for deep‑hole applications where standard-length bits fall short. The set includes five common sizes—1/4″, 5/16″, 3/8″, 7/16″ and 1/2″—covering a broad spectrum of hole diameters used in aerospace, automotive, and general industrial fabrication. Constructed from high‑speed steel, the bits combine hardness with toughness, delivering wear resistance that stands up to repeated drilling in hardened steels, stainless steels, and other ferrous alloys. A black‑oxide surface treatment further enhances performance by reducing friction, improving chip evacuation, and extending the life of the cutting edge. All bits conform to the national aerospace standard 907, ensuring they meet stringent quality and dimensional tolerances required for critical applications.

Usage

These long‑length drill bits excel in scenarios where depth and accuracy are paramount. They are ideal for drilling through thick steel plates, structural beams, and aerospace components where a standard 3‑inch bit cannot reach the required depth. The set is also well‑suited for maintenance technicians working on heavy‑duty equipment, such as hydraulic cylinders, gearboxes, and engine blocks, where access is limited and a longer shank provides the necessary leverage. Because the bits are coated with black oxide, they maintain lower operating temperatures, making them reliable for continuous use in high‑speed drilling operations. Whether you are a machinist in a machine shop, a field service engineer, or a hobbyist tackling a demanding project, the Drill America extension set offers the versatility and durability needed to complete the job efficiently.

Why Choose Us

Choosing the Drill America POU Series means selecting a product backed by decades of expertise in tool manufacturing and a reputation for meeting aerospace‑grade specifications. Each bit undergoes rigorous quality control testing, including hardness verification, dimensional inspection, and coating adhesion checks, to guarantee consistent performance across the entire set. The black‑oxide treatment not only reduces friction but also creates micro‑pockets that retain coolant at the cutting edge, enhancing chip removal and extending tool life. Our commitment to customer satisfaction includes a responsive support team ready to assist with any technical questions, as well as a straightforward warranty process that protects your investment. By delivering a set that balances high‑performance material, precise engineering, and reliable after‑sales service, Drill America ensures you can trust the tools you rely on for critical drilling tasks.

Key Features

• Five sizes from 1/4″ to 1/2″ give you flexibility for a wide range of hole diameters.
• 6‑inch overall length provides the extra reach needed for deep‑hole drilling in thick materials.
• High‑speed steel construction offers a balance of hardness and toughness for long‑lasting performance.
• Black‑oxide coating reduces friction, improves coolant retention, and extends tool life.
• Comes with dedicated customer support and a hassle‑free warranty for peace of mind.

FAQ

What materials can these bits drill effectively?

The set is designed for general‑purpose drilling in iron and steel families, including carbon steel, alloy steel, and stainless steel. The HSS material and black‑oxide coating also allow for occasional use in non‑ferrous metals such as aluminum and brass, though performance is optimized for ferrous applications.

Do I need a special chuck to use these 6‑inch bits?

No special equipment is required. The bits feature a standard 1/4‑inch shank that fits most common drill chucks and collets. Ensure the chuck is tightened securely to prevent wobble during deep drilling.

How does the black‑oxide coating benefit the drilling process?

Black‑oxide creates a lubricated surface that reduces friction between the bit and the workpiece, which helps keep temperatures lower and improves chip evacuation. This results in longer tool life and smoother cuts, especially when drilling hard metals.

Are these bits compatible with CNC machines?

Yes, the bits can be used in CNC drilling operations as long as the machine’s spindle can accommodate the 1/4‑inch shank size. Their consistent dimensions and aerospace‑grade tolerances make them suitable for automated production environments.

What is the warranty coverage for this set?

Drill America offers a one‑year limited warranty covering manufacturing defects. If a bit fails due to a material or workmanship issue within the warranty period, we will replace it at no cost to you.