






Milwaukee 27/64" Thunderbolt Black Oxide Drill Bit 48-89-2733
ENGINEERED FOR HIGH-TORQUE LOADS AND MAXIMUM CORE STRENGTH
The Milwaukee Thunderbolt series represents a significant mechanical upgrade over standard jobber bits. By incorporating a thicker web—the "Thunderbolt" core—Milwaukee has engineered out the primary failure point of traditional bits: side-load breakage. This 27/64" bit features a parabolic flute design that optimizes chip evacuation, reducing heat buildup and extending the life of the cutting edge. For professionals running high-torque cordless drills, the 3-flat Secure-Grip shank is a critical inclusion, ensuring the bit remains locked in the chuck even when encountering heavy resistance in thick-gauge metal or hardwoods.
- / THICKER CORE GEOMETRY: The Thunderbolt web provides superior structural integrity, protecting the bit against snapping during high-torque or side-load maneuvers.
- / 135° SPLIT POINT: Eliminates the need for a center punch by starting on contact, preventing bit "walking" on curved or polished surfaces.
- / PARABOLIC FLUTE DESIGN: Rapidly clears material and swarf to keep the cutting edge cool and maintain drilling speed.
- / SECURE-GRIP SHANK: Three flat sides on the shank prevent the bit from spinning in the chuck under heavy load, maximizing power transfer.
- / CORROSION RESISTANT FINISH: The black oxide coating provides essential lubricity and protects the tool from oxidation in harsh jobsite environments.
TECHNICAL SPECIFICATIONS
| Bit Diameter | 27/64" |
| Decimal Equivalent | 0.4219 |
| Shank Size | 3/8" (Reduced) |
| Shank Type | 3-Flat Secure-Grip™ |
| Coating | Black Oxide |
| Overall Length | 5-3/8" |
| Flute Length | 3-15/16" |
| Point Angle | 135° Split Point |
| Material Application | Metal, Wood, PVC |
WHAT'S IN THE BOX
(1) 27/64" Thunderbolt® Black Oxide Drill Bit (48-89-2733)
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
ENGINEERED FOR HIGH-TORQUE LOADS AND MAXIMUM CORE STRENGTH
The Milwaukee Thunderbolt series represents a significant mechanical upgrade over standard jobber bits. By incorporating a thicker web—the "Thunderbolt" core—Milwaukee has engineered out the primary failure point of traditional bits: side-load breakage. This 27/64" bit features a parabolic flute design that optimizes chip evacuation, reducing heat buildup and extending the life of the cutting edge. For professionals running high-torque cordless drills, the 3-flat Secure-Grip shank is a critical inclusion, ensuring the bit remains locked in the chuck even when encountering heavy resistance in thick-gauge metal or hardwoods.
- / THICKER CORE GEOMETRY: The Thunderbolt web provides superior structural integrity, protecting the bit against snapping during high-torque or side-load maneuvers.
- / 135° SPLIT POINT: Eliminates the need for a center punch by starting on contact, preventing bit "walking" on curved or polished surfaces.
- / PARABOLIC FLUTE DESIGN: Rapidly clears material and swarf to keep the cutting edge cool and maintain drilling speed.
- / SECURE-GRIP SHANK: Three flat sides on the shank prevent the bit from spinning in the chuck under heavy load, maximizing power transfer.
- / CORROSION RESISTANT FINISH: The black oxide coating provides essential lubricity and protects the tool from oxidation in harsh jobsite environments.
TECHNICAL SPECIFICATIONS
| Bit Diameter | 27/64" |
| Decimal Equivalent | 0.4219 |
| Shank Size | 3/8" (Reduced) |
| Shank Type | 3-Flat Secure-Grip™ |
| Coating | Black Oxide |
| Overall Length | 5-3/8" |
| Flute Length | 3-15/16" |
| Point Angle | 135° Split Point |
| Material Application | Metal, Wood, PVC |
WHAT'S IN THE BOX
(1) 27/64" Thunderbolt® Black Oxide Drill Bit (48-89-2733)













