Eagle Cutting Tool AC700-121-I Cobalt Aircraft Drill 21in Oal

Product Description

The EAGLE CUTTING TOOL AC700-121-I is a cobalt aircraft extension drill bit built for drilling in tight or deep-reach applications where a standard-length drill falls short. The extended 21-inch overall length (OAL) gives technicians and tradespeople the reach needed to bore through structural assemblies, HVAC ductwork framing, wall cavities, and other confined spaces. Cobalt construction provides heat resistance and durability when cutting through harder materials such as stainless steel, hardened alloys, and thick-gauge sheet metal. This bit is designed for professional use in aviation maintenance, mechanical contracting, HVAC installation, and related trades.

This drill bit suits applications where standard jobber-length bits cannot reach — including drilling through wall studs, deep metal frames, and layered assemblies encountered in HVAC, plumbing, and general mechanical installation work. The aircraft-extension geometry allows the bit to maintain alignment over its extended length, reducing wander during penetration. It is well suited for use with standard drill presses or heavy-duty handheld drills operating at appropriate speeds for cobalt tooling.

Key Features

• Cobalt construction resists heat buildup and extends tool life when drilling hard metals
• 21-inch overall length provides extended reach into deep or restricted work areas
• Aircraft-extension design maintains alignment and reduces bit wander during use
• Compatible with standard drill chucks used in handheld and stationary drilling equipment
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as an OEM-style replacement and general-use cobalt aircraft extension drill bit suitable for use with standard drill equipment in HVAC, mechanical, and structural drilling applications.

Installation Notes

Aircraft extension drill bits should be installed and operated by qualified tradespeople familiar with metal drilling procedures. Secure the workpiece before drilling and use appropriate cutting fluid when boring through hard or stainless alloys to extend bit life. Select drill speed according to material type and bit diameter as specified by standard machining references. Inspect the bit shank for wear or damage before each use.

Technical Specifications

• Overall Length (OAL): 21 inches
• Material: Cobalt
• Weight: 0.37 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: AC700-121-I