Milwaukee Thunderbolt Black Oxide Drill Bit Set 1/16″ to 1/2″ 29-Piece

Milwaukee’s Thunderbolt Black Oxide drill bits tackle the two biggest frustrations contractors face with standard bits — walking on contact and snapping under side load. The 135° split point tip enables precise starting on contact without walking or drifting, while the Thunderbolt Web design features a thicker core providing increased strength and protection against side-load breakage.

Worth it for contractors drilling through mixed materials daily. At 2.975 lbs for the complete 29-piece set, you’re getting properly engineered bits that handle mild steel, iron, wood, engineered lumber, plastics, and PVC without constant bit changes.

Skip it if you’re only drilling hardened steel or stainless. Cobalt bits are superior for hardened or stainless steel but more brittle and expensive. These Thunderbolt bits shine in general construction where you need one set that handles everything from steel studs to engineered lumber.

Engineering That Actually Matters

The 3-Flat Secure-Grip shank on sizes 3/16” and larger prevents the bit from slipping or spinning in the chuck during high-torque applications. Nothing worse than a bit spinning in the chuck halfway through a hole — especially when you’re 20 feet up on a ladder. The smaller bits use standard round shanks since chuck slip isn’t an issue at those diameters.

Parabolic flutes provide faster chip clearing and reduce heat build-up. Heat kills bits faster than almost anything else. These wider flutes move material out quickly, keeping the cutting edge cooler and extending bit life — particularly important when drilling repetitive holes in metal studs.

Specification	Value
Material	High Speed Steel (HSS)
Point Angle	135° Split Point
Size Range	1/16” to 1/2” (by 64ths)
Total Pieces	29
Set Weight	2.975 lbs
Case Dimensions	10.31” L x 12.52” W x 1.7” H

Black Oxide vs The Premium Options

Black oxide offers durability, lubrication, and resistance to corrosion and heat. Unlike titanium coatings that wear off, black oxide maintains its performance through the material’s bulk lubricity properties. The treatment penetrates the steel itself rather than sitting on top like paint.

Here’s when each coating makes sense:

• Black Oxide (these bits): General construction, mixed materials, best value
• Titanium: Higher surface hardness for speed but the coating wears off
• Cobalt: Hardened steel specialist, but more brittle and overkill for wood/plastic

The 29 individual bits include every size from 1/16” through 1/2” in 1/64” increments. No gaps in the sizing means you’ve got the exact bit for pilot holes, clearance holes, or tap drilling. The customizable deep red index case with PACKOUT compatible design keeps them organized — though that case latch design could be better based on user feedback.

Compatible with any standard 3-jaw drill chuck, these work in both corded and cordless drills with 1/2” or 3/8” chucks. For metal drilling, cutting oil is recommended for cooling and bit life extension — especially important in Montana’s temperature extremes where metal can be ice cold one minute and blazing hot the next.

FAQs

Q: Do these bits require special chucks or drill settings?

A: These bits are compatible with any standard 3-jaw drill chuck and work with standard corded and cordless drills with 1/2” or 3/8” chucks. Ensure the 3-flat shank is properly aligned with chuck jaws for a secure grip on the larger sizes.

Q: What materials are these Thunderbolt bits designed for?

A: These bits are optimized for drilling through mild steel and iron, general purpose drilling in wood and engineered lumber, and are suitable for various plastics and PVC materials. They’re designed for professional jobsite use and heavy-duty maintenance.

Q: How does black oxide compare to titanium coating for durability?

A: Titanium bits offer higher surface hardness for speed but the coating wears off, while black oxide maintains its performance through the material’s bulk lubricity properties. The black oxide treatment penetrates the steel rather than sitting on the surface, providing longer-lasting performance in general construction applications.

Q: What sizes come in the 29-piece set?

A: The set includes 29 individual bits: 1/16”, 5/64”, 3/32”, 7/64”, 1/8”, 9/64”, 5/32”, 11/64”, 3/16”, 13/64”, 7/32”, 15/64”, 1/4”, 17/64”, 9/32”, 19/64”, 5/16”, 21/64”, 11/32”, 23/64”, 3/8”, 25/64”, 13/32”, 27/64”, 7/16”, 29/64”, 15/32”, 31/64”, 1/2”. Every size in 1/64” increments from 1/16” to 1/2”.

Q: Are these bits covered under Milwaukee’s warranty?

A: Milwaukee Tool drill bits and other consumables are not typically covered by a standard warranty, though they may be replaced if a manufacturing defect is present upon purchase. Drill bits are considered consumable accessories that wear through normal use.