Milwaukee 48-89-2717 Thunderbolt Black Oxide Drill Bit

Product Description

The MILWAUKEE 48-89-2717 is a Thunderbolt black oxide jobber length drill bit built for heavy-duty performance in professional trade applications. The thicker web core provides exceptional strength and resistance to side-load breakage, extending service life under demanding conditions. A 135-degree split point tip starts on contact, eliminating bit walking and improving hole accuracy. The parabolic flute geometry clears chips and debris efficiently, reducing heat buildup and allowing continuous drilling. This bit is well suited for use with portable drills and performs reliably on curved or irregular surfaces.

This drill bit is designed for professional tradespeople including electricians, plumbers, HVAC technicians, and general contractors who require fast, accurate drilling in metal, wood, and similar materials. The 3-flat Secure-Grip shank holds firmly in standard drill chucks, and the reduced shank diameter allows compatibility with 3/8-inch chucks, making it practical across a wide range of jobsite drills. It is sold individually and is a strong choice for everyday jobsite drilling tasks where bit longevity and precision startup matter.

Key Features

• Thicker web core resists side-load breakage and extends bit life compared to standard jobber bits
• 135-degree split point tip starts on contact to prevent walking and improve hole accuracy
• Parabolic flute design clears chips rapidly to reduce heat and maintain drilling speed
• 3-flat Secure-Grip shank locks firmly in the drill chuck to reduce slipping
• Reduced shank diameter fits 3/8-inch chucks for use with a wide range of portable drills
• Black oxide coating provides lubricity and corrosion resistance throughout bit life

Compatibility

Designed for use with standard portable drills equipped with 3/8-inch or larger chucks. The reduced shank diameter broadens compatibility across common jobsite drill models.

Installation Notes

This bit is installed and operated by any licensed trade professional or qualified user working with a portable or bench-mounted drill. Secure the shank firmly in the chuck before use and verify the chuck is tightened completely to prevent slipping. When drilling metal, use appropriate cutting fluid where applicable to extend bit life. Inspect the cutting edges before each use and replace any bit showing signs of chipping or excessive wear.

Technical Specifications

• Length: 6 inches
• Package Dimensions: 5.7 x 1.9 x 0.2 inches
• Weight: 0.03 pounds
• Point Angle: 135 degrees
• Shank Type: 3-flat Secure-Grip reduced shank
• Coating: Black oxide
• Unit of Measure: Each

Standard Information

• Brand: MILWAUKEE
• Manufacturer Part Number: 48-89-2717