Product Description
Milwaukee 3/16 in. x 12 in. Aircraft Length Black Oxide Drill Bit
Model Number: 48-89-2771
The Milwaukee 48-89-2771 is a 3/16 in. x 12 in. Aircraft Length Black Oxide Drill Bit — an extra-long twist drill bit for drilling through deep sections, awkward access positions, and drilling around obstacles that require the 12 in. extended reach beyond what standard and jobber-length bits provide. The aircraft length designation indicates the extended overall length format that was originally standardized for aerospace and aviation maintenance drilling — the long length allows drilling through thick structural members, deep pockets, and positions where the drill body cannot be positioned close to the drilling face. At the small 3/16 in. diameter, the 12 in. length provides the reach for drilling pilot holes through thick wood assemblies, metal structures, and concrete-encased conditions where the drill tip must reach a specific depth from the accessible face.
The black oxide finish provides mild corrosion resistance and a reduced surface friction that helps with chip evacuation in deep holes where standard bright finish bits experience more friction buildup during extended-length drilling. At 12 in. length in the small 3/16 in. diameter, drilling technique matters — maintaining a straight entry angle and allowing adequate chip clearing by periodically withdrawing the bit during deep hole drilling prevents the bit from deflecting or breaking in the extended-length configuration. Milwaukee manufactures aircraft-length bits to professional quality standards for the production drilling applications in aviation maintenance, construction, and industrial work where the extended length format is specifically required.
See Milwaukee's complete aircraft-length and standard-length drill bit lineup for all available diameters and coating options.
Features
- 12 in. aircraft length for drilling through deep sections beyond standard bit reach
- 3/16 in. for pilot holes and light-duty applications in deep or awkward positions
- Black oxide coating for mild corrosion resistance and reduced deep-hole friction
- Periodically withdraw during deep drilling to clear chips and prevent bit deflection
- For aviation, construction, and industrial applications requiring extended reach
Specifications
- Diameter: 3/16 in.
- Length: 12 in. (Aircraft Length)
- Coating: Black Oxide
- Application: Deep-Section Drilling in Metal, Wood, and Structural Assemblies
Includes
- (1) Milwaukee 48-89-2771 3/16 in. x 12 in. Aircraft Length Black Oxide Drill Bit
