Drill America – GLBCOX67/32 7/32″ x 6″ Cobalt Aircraft Extension Drill Bit, GLBCO Series, 1 Count (Pack of 1)

Description

Product Overview

The Drill America GLBCOX67/32 is a 7/32 inch diameter, 6 inch long cobalt aircraft extension drill bit designed for demanding machining environments. Constructed from high‑grade cobalt steel, the bit offers exceptional hardness and heat resistance, allowing it to maintain cutting performance when drilling into materials with high tensile strength such as stainless steel, Inconel, and titanium alloys. The 135° split point tip is engineered to start holes precisely without wandering, reducing the need for pilot holes and improving overall efficiency. A thin gold oxide surface treatment provides a protective barrier against corrosion while preserving the inherent toughness of the cobalt substrate. The round shank design ensures compatibility with a wide range of chuck and collet systems, making the bit versatile for both handheld drills and CNC spindle applications.

Usage

This extension bit excels in aerospace manufacturing, marine engineering, and high‑performance automotive repair where access to deep or hard‑to‑reach locations is required. Its 6 inch overall length provides the extra reach needed to drill through thick sections of alloy without sacrificing rigidity. Professionals use it for creating precise clearance holes, fastener pilot holes, and venting passages in aircraft fuselage panels, turbine housings, and marine propeller shafts. The bit’s geometry and coating allow it to operate at higher spindle speeds than standard high‑speed steel bits, reducing cycle time while maintaining surface finish quality. It is equally suitable for maintenance technicians performing on‑site repairs where reliability and tool longevity are critical.

Why Choose Us

Drill America has a long history of supplying tool manufacturers with components that meet rigorous aerospace standards. Each GLBCOX67/32 bit undergoes a multi‑stage quality control process, including hardness testing, dimensional inspection, and coating adhesion verification, to ensure consistent performance across batches. The cobalt alloy composition delivers a balance of hardness and toughness, reducing the risk of chipping or breakage during aggressive drilling operations. Gold oxide treatment, while thinner than traditional black oxide, offers comparable corrosion resistance without compromising the bit’s cutting edge. Our commitment to precision manufacturing means the bit maintains true concentricity, minimizing runout and delivering smoother hole entry.

In addition to product quality, Drill America provides comprehensive technical support. Our engineering team can advise on optimal feed rates, spindle speeds, and coolant selection for specific material combinations, helping users achieve the best results with minimal trial and error. We also offer a straightforward warranty that covers manufacturing defects, reinforcing confidence in the durability of the bit. By choosing this extension drill bit, customers benefit from a combination of material science, manufacturing expertise, and after‑sales service that together reduce downtime and tool replacement costs.

Key Features

• High‑grade cobalt steel construction delivers superior hardness for drilling tough alloys.
• 135° split point tip starts holes accurately, eliminating the need for pilot holes.
• Gold oxide coating provides corrosion resistance while preserving cutting performance.
• 6‑inch overall length offers extra reach for deep or hard‑to‑access drilling tasks.
• Round shank fits a wide range of chuck and collet systems for versatile tool compatibility.
• Comprehensive technical support and warranty ensure reliable long‑term use.

FAQ

What materials can this bit reliably drill?

The GLBCOX67/32 is optimized for high‑tensile alloys such as stainless steel, Inconel, and titanium. It also performs well on hardened carbon steel and other aerospace‑grade metals when proper cutting parameters are used.

How does the gold oxide coating differ from black oxide?

Gold oxide is a thinner oxide layer that offers similar corrosion protection to black oxide but does not significantly affect the bit’s cutting edge. It provides a cleaner appearance and maintains the inherent hardness of the cobalt substrate.

Can this bit be used in CNC machines?

Yes. The round shank design is compatible with standard CNC collets and chucks. Its rigidity and precise geometry make it suitable for automated drilling cycles in high‑precision manufacturing environments.

What coolant or lubrication is recommended?

For drilling stainless steel or titanium, a high‑pressure coolant system with a water‑based cutting fluid is recommended to reduce heat buildup. Inconel benefits from a coolant with added lubricants to improve chip evacuation and surface finish.

Is there a warranty on this product?

Drill America offers a limited warranty covering manufacturing defects for a period of one year from the date of purchase. Contact our support team for warranty claims or technical assistance.