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Internet #202256166

Model #48-89-2740

Store SKU #772249

9/16 in. S and D Black Oxide Drill Bit

  • Thunderbolt web design provides longer life and faster drilling
  • 3-Flat Secure Grip shank reduces bit slipping in the chuck
  • Accurate and clean drilling holes
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Product Overview

The Milwaukee 48-89-2740 9/16 in. Thunderbolt Black Oxide Drill Bit features durable black oxide construction. This drill bit is excellent for drilling on curved surfaces and recommended for use with portable drills. The thick core provides protection against side-load breakage.
  • Thunderbolt web, provides longer life and faster driller times
  • Parabolic flute, clears chips faster
  • Black oxide construction for durability
  • 135° split point, precision start no walking
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Info & Guides

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Assembled Depth (in.)
0.48 in
Assembled Height (in.)
7.75 in
Assembled Width (in.)
1.88 in
Bit Diameter
9/16 in
Bit Length (in.)
Shank Diameter
1/2 in


Bit Material
Black Oxide
Drill Bit Type
Drill Bit Type(s) Included
Material Application
Shank Style
Shank Style
Tools Product Type
Power Tool

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.2
    out of 5 reviews
  • 75% recommend this product
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Showing 1-5 of 5 reviews
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
  • Verified Purchase
great bit
simple & easy to assemble with the instructions included
  • Pro
  • Verified Purchase
  • Recommended
milwaukee is the way to go
I have been buying Milwaukee blades lately after noticing that Dewalt blades were junk. So, I needed a drill bit and ran up to home depot to get a good one. I was going to get the Milwaukee first, but that shiny Dewalt titanium precision bit lured me away. So I bought the Dewalt which drilled the first two holes perfectly, then broke as I began to drill the third. I took the Dewalt back to the home depot for a refund and purchased the Milwaukee like I should have in the first place. It drilled the remaining six holes through 1/4 steel without issue. This is a good bit, and just what I have come to expect from Milwaukee. Side note: Not sure what they guy with the negative review got, could have been a lemon. I drilled six holes in 1/4 plate steel with no lubricant, and it cut like a hot knife through butter.
  • DIY
  • Recommended
9/16 inch dril bit
I build a number of wooden toys that I sell and this drill bit was used to make holes to connect certain parts together with dowel pins. I have all ready used this bit to drill several holes in both soft and hard woods and it always produced a clean smooth hole.
  • DIY
  • Verified Purchase
  • Recommended
Chinese junk!
Would not even drill through 1/8" mild steel plate, on a drill press, with oil and the proper speed. If I want to buy Chinese junk I can go to Harbor freight. Now it will cost me hours or days to find a real bit!!!
  • Pro
1 person found this helpful
Showing 1-5 of 5 reviews