
Milwaukee 15/32" Thunderbolt Black Oxide Drill Bit 48-89-2846
REINFORCED WEB GEOMETRY FOR AGGRESSIVE DRILLING APPLICATIONS
When you're pushing a high-torque drill to its limits, the weakest link is often the bit's core. The Milwaukee Thunderbolt series addresses this by utilizing a significantly thicker web than standard jobber bits, providing the structural integrity needed to withstand heavy side-load pressure without snapping. The 135-degree split point is a critical feature for professional users, ensuring the bit bites into the material immediately upon contact—even on curved or uneven surfaces—eliminating the need for a center punch. By combining a parabolic flute design for rapid chip evacuation with a black oxide coating for reduced friction, these bits maintain a lower operating temperature, which is the primary factor in extending the service life of high-speed steel in repetitive metal-drilling cycles.
- / Thunderbolt® Web: Engineered with a thicker core to provide ultimate strength and protection against side-load breakage during heavy-duty use.
- / 135° Split Point: Precision tip starts on contact to prevent bit walking, ensuring fast and accurate hole placement without a pilot hole.
- / Parabolic Flute Design: Clears chips and debris rapidly to keep the bit cool and prevent binding in deep-hole applications.
- / 3-Flat Secure-Grip™ Shank: Features three flat sides to provide a solid connection with the drill chuck, preventing slipping under high torque.
- / Black Oxide Coating: Provides essential lubricity and corrosion resistance, reducing heat buildup for a longer-lasting cutting edge.
TECHNICAL SPECIFICATIONS
| Diameter | 15/32" |
| Decimal Equivalent | 0.4688" |
| Overall Length | 5-3/4" |
| Flute Length | 4-5/16" |
| Shank Size | 3/8" (Reduced) |
| Shank Type | 3-Flat Secure-Grip™ |
| Point Angle | 135° Split Point |
| Material | High Speed Steel |
| Coating | Black Oxide |
WHAT'S IN THE BOX
(1) 15/32" Thunderbolt® Black Oxide Drill Bit (48-89-2846)
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
REINFORCED WEB GEOMETRY FOR AGGRESSIVE DRILLING APPLICATIONS
When you're pushing a high-torque drill to its limits, the weakest link is often the bit's core. The Milwaukee Thunderbolt series addresses this by utilizing a significantly thicker web than standard jobber bits, providing the structural integrity needed to withstand heavy side-load pressure without snapping. The 135-degree split point is a critical feature for professional users, ensuring the bit bites into the material immediately upon contact—even on curved or uneven surfaces—eliminating the need for a center punch. By combining a parabolic flute design for rapid chip evacuation with a black oxide coating for reduced friction, these bits maintain a lower operating temperature, which is the primary factor in extending the service life of high-speed steel in repetitive metal-drilling cycles.
- / Thunderbolt® Web: Engineered with a thicker core to provide ultimate strength and protection against side-load breakage during heavy-duty use.
- / 135° Split Point: Precision tip starts on contact to prevent bit walking, ensuring fast and accurate hole placement without a pilot hole.
- / Parabolic Flute Design: Clears chips and debris rapidly to keep the bit cool and prevent binding in deep-hole applications.
- / 3-Flat Secure-Grip™ Shank: Features three flat sides to provide a solid connection with the drill chuck, preventing slipping under high torque.
- / Black Oxide Coating: Provides essential lubricity and corrosion resistance, reducing heat buildup for a longer-lasting cutting edge.
TECHNICAL SPECIFICATIONS
| Diameter | 15/32" |
| Decimal Equivalent | 0.4688" |
| Overall Length | 5-3/4" |
| Flute Length | 4-5/16" |
| Shank Size | 3/8" (Reduced) |
| Shank Type | 3-Flat Secure-Grip™ |
| Point Angle | 135° Split Point |
| Material | High Speed Steel |
| Coating | Black Oxide |
WHAT'S IN THE BOX
(1) 15/32" Thunderbolt® Black Oxide Drill Bit (48-89-2846)













