Irwin 62132 1/2″ x 12″ Black Oxide Aircraft Twist Drill Bit, A12

The Irwin 62132 1/2″ x 12″ Aircraft Twist Drill Bit is built for tough metal drilling applications that demand accuracy and longevity. Manufactured from M-42 high-speed steel with 8% cobalt, this drill bit provides excellent wear resistance and heat tolerance, making it ideal for repetitive drilling in hardened metals like stainless steel and alloy steel. Its black oxide finish helps reduce friction and increase durability, while the 135° split point design ensures clean starts without the need for a center punch. The 12″ extended length gives users improved reach for deeper or hard-to-access holes, often required in aviation, metal fabrication, and heavy equipment maintenance.

Whether you’re fabricating parts, drilling through structural steel, or working in confined spaces, this long aircraft bit is up for the job. The heavy-duty spiral flutes quickly remove chips, keeping the cutting edge cooler and more effective over time. With a straight shank that offers secure grip in standard drill chucks, this bit is compatible with hand drills, drill presses, and magnetic drills used across trades and industrial settings.

Irwin 62132 1/2″ x 12″ Black Oxide Aircraft Twist Drill Bit At a Glance

• M-42 Cobalt Steel Construction: Offers superior resistance to heat and wear, ideal for tough metal drilling.
• Black Oxide Finish: Reduces friction and prevents rust, helping the bit last longer.
• 135° Split Point Tip: Self-centering design starts on contact and reduces walking on metal surfaces.
• 12″ Aircraft Length: Provides extended reach for deep hole drilling in hard-to-access areas.
• Heavy-Duty Spiral Flutes: Improve chip ejection, reducing heat buildup and bit fatigue.
• Straight Shank: Compatible with standard chucks for secure and stable drilling.

Markets

• Metal Fabrication Frequently used for drilling structural steel, tubing, and brackets with precision and minimal wander.
• Aerospace and Aviation Maintenance Ideal for deep drilling into airframe materials and metal components in aircraft repairs and upgrades.
• Automotive and Heavy Equipment Repair Useful for reaching recessed fasteners or bolt holes in engine blocks, frames, and panels.
• Construction and Industrial Contracting Performs well on job sites requiring repetitive metal drilling for beams, rebar, or formwork.
• Municipal and Utility Services Suitable for field installations involving conduit, signage, or infrastructure repairs in steel.
• Welding and Fabrication Shops Offers precise, long cuts in metals that will be welded or assembled into heavy-duty structures.
• Education and Trade Schools A great training tool for students learning about high-speed steel tooling and deep-hole drilling techniques.

Metalworkers, fabricators, and field service techs benefit from the Irwin 62132 aircraft bit by being able to drill deeper and more precisely without sacrificing bit life. The cobalt steel composition keeps cutting edges sharper longer, even in heat-intensive jobs, while the extended length supports access in tight or recessed areas. It’s a solid solution when power and reach are both required—saving time on rework and bit replacement.

Irwin 62132 1/2″ x 12″ Black Oxide Aircraft Twist Drill Bit Features

Irwin 62132 1/2″ x 12″ Black Oxide Aircraft Twist Drill Bit Specifications

• Cutting Diameter: 1/2 inch (12.7 mm)
• Overall Length: 12 inches
• Shank Type: Straight
• Material: M-42 High-Speed Steel with 8% Cobalt
• Finish: Black Oxide
• Point Angle: 135 Degrees Split Point
• Flute Type: Spiral
• Number of Flutes: 2
• Made In: China

Why Customers Choose the Irwin 62132 1/2″ x 12″ Black Oxide Aircraft Twist Drill Bit

Professionals keep this 1/2″ aircraft drill bit on hand because it punches clean, accurate holes through steel without overheating or dulling fast. Commonly called a “long reach drill bit” or “deep hole bit,” it’s valued for jobs where standard bits just won’t cut it. Whether you’re doing overhead pipe work, frame repair, or field service on industrial machinery, this bit cuts downtime by holding an edge and getting through metal fast. It’s a go-to in the shop or out in the field when reach and strength matter.