What It Is

This HSS black oxide aircraft extension drill bit is designed for drilling in deep, recessed, or hard-to-reach areas where standard length drill bits cannot reach. It is well suited for maintenance, fabrication, aerospace, and field service applications requiring extended reach and precision.

Material & Construction

Manufactured from high-speed steel (HSS), this drill bit provides a balance of toughness and wear resistance for everyday drilling tasks. The black oxide surface treatment enhances abrasion resistance and helps reduce friction during operation.

135° Split Point

The 135° split point tip starts on contact and helps reduce walking, especially when drilling in tight or awkward positions. This geometry also requires less thrust, making it easier to control when working at extended lengths.

Aircraft Extension Design

Aircraft extension drill bits are significantly longer than standard jobber length bits, allowing access to deep holes and confined spaces that would otherwise be unreachable. This extended length makes them ideal for applications where clearance is limited or additional reach is required. While longer in design, they are engineered to maintain control and accuracy when used properly.

Applications

Commonly used for:

• Drilling in deep or obstructed areas
• Aircraft and aerospace maintenance
• Automotive and equipment repair
• Fabrication and assembly work
• General-purpose drilling in metal, plastic, and wood

Frequently Asked Questions

What is a black oxide drill bit user for?

Black oxide drill bits are used for general-purpose drilling in metal, plastic, and wood. The black oxide finish helps improve wear resistance and reduce friction.

What does a 135° split point mean?

A 135° split point is a self-centering drill tip that starts on contact and helps reduce walking. It requires less force and improves accuracy, especially when drilling in tight or awkward positions.

What materials can this drill bit drill?

This drill bit is suitable for aluminum, brass, copper, steel, plastic, and wood.

What is an aircraft extension drill bit?

An aircraft extension drill bit is a longer-than-standard drill bit designed to reach deep holes or access confined spaces where shorter bits cannot reach.

When should I use an aircraft extension drill bit instead of a jobber length bit?

Aircraft extension drill bits should be used when additional reach is required. For general-purpose drilling where reach is not a concern, jobber length bits are typically preferred due to increased rigidity.

Is this drill bit suitable for stainless steel?

While it can drill some stainless applications, cobalt drill bits are generally preferred for harder stainless steels.