Model # 48-89-2303

Internet #203115289

Store SKU #1001294891

Store SO SKU #1000670183

Milwaukee 3/32 in. Cobalt Thunderbolt Drill Bit
0045242188185

Milwaukee

3/32 in. Cobalt Thunderbolt Drill Bit

  • Variable helix design for fast material removal
  • Chip breaker decreases heat build up
  • Stays sharper longer
$2.57 /each

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Product Overview

The Milwaukee 48-89-2303 Thunderbolt Cobalt drill bits are designed for extreme durability and long life in specialty applications. The Thunderbolt web features a thicker core than a standard drill bit to provide ultimate strength and protect against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. The 135-degree split point tip delivers a precision start and prevents walking for fast, accurate holes. Effective for drilling on curved surfaces, Milwaukee Thunderbolt Cobalt bits require less effort to drill through stainless steel, high alloy steel and cast iron, and are highly recommended for use with portable drills.

  • Thunderbolt web provides longer life and faster driller times
  • Parabolic flute clears chips faster
  • Fast, accurate drilling: 135-degree split point tip starts on contact to prevent walking, while the parabolic flute clears chips fast
  • Extreme durability: designed for high performance with stainless steel, high alloy steel and cast iron

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Customer Questions & Answers

2 Questions2 Answers

Customer Questions & Answers

3/32 in. Cobalt Thunderbolt Drill Bit
3/32 in. Cobalt Thunderbolt Drill Bit

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1 answer

length of drill bit?

This question is from 7/32 in. Cobalt Red Helix Drill Bit
Asked by
Austin TX
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January 14, 2016
need length to be 2-1/4" min.
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Answer (1)

January 15, 2016
Answer: 
This bit is 3.88' long.
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1 answer

Question is about Thunderbolt Cobalt drill bit specifications

This question is from 5/16 in. Thunderbolt Cobalt Drill Bit
Asked by
Berkeley, CA
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May 30, 2014
Item description does not specify either hardness (M42, M36, etc.) or Cobalt percentage (5%, 8%, etc.).
Are these bit solid Cobalt Alloy Steel or simply coated High Speed Steel bits?
Item description also says they are Titanium coated, probably a typo.
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Answer (1)

June 2, 2014
Answer: 
The Cobalt is an additive to the steel (not a surface finish). Cobalt bits 7/16” and larger are made out of M42, diameters under 7/16” are M35
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Customer Reviews

Rated 4.1 out of 5 by 62 reviewers.
Rated 5.0 out of 5.0 by Good bit, good price Not a whole lot to say here, it's a drill bit, it's nice and not too pricey. Needed to replace a dulled 3/32 bit and this one fit the bill. September 20, 2016
Rated 5.0 out of 5.0 by Drill Bit This drill bit size is sometimes hard to find, so be sure to include it in your "arsenal" of bits as it will come in handy. The best part of this bit, in my opinion, is the "non-walking" feature. If you've ever used a drill bit that just wouldn't seem to stay where you wanted it, in one place, when you were using it, you will really appreciate this feature. It functions like a regular drill bit should, but it's stability when you are drilling is what' really good. August 4, 2016
Rated 5.0 out of 5.0 by a good bit A drill bit that handles wood and metal, and has little tendency to 'walk', apparently due to the 135 degree tip. Milwaukee claims an extremely long life for this bit, of course only time will tell. Certainly not overpriced and it does seem initially very sharp. I never worry with Milwaukee as I've never gotten anything from them that isn't absolutely first rate. July 8, 2016
Rated 5.0 out of 5.0 by Excellent Drill Bit This drill bit delivers exactly as promised. I used it several times on my drill press. Setting the speed to low, it easily drilled through several types and thicknesses of metal. It also did not "walk" as it made contact with the metal surfaces. Although, I have not used it a lot, yet, it has maintained its sharpness. I did not have any problems with it "over heating", however, I oil my metal surfaces prior to drilling. February 9, 2016
Rated 4.0 out of 5.0 by Works as good as any drill bit The drill bit works as well as any I have used before, so I can't really say it is special in any way,. but it is as good as any other. I believe that the issue then would come down to what it spent on the drill bit. If it was priced reasonable low in comparison to others I have tried before, then I would, of course, buy this drill bit. If it were priced more I would not. Relatively simple - it comes down to cost. January 25, 2016
Rated 5.0 out of 5.0 by Great bit I used this bit to drill into my trucks frame to install a hitch. It did awsome and still looks like new after drilling 8 holes in really hard metal. October 20, 2016
Rated 5.0 out of 5.0 by Bit worked great! We purchased these bits because we were replacing a deck on our 35' flatbed. We broke 6 DeWalt bits and the young man at Home Depot recommended this bit. We finished over 1/2 of the deck on one bit! Great performance! October 4, 2016
Rated 3.0 out of 5.0 by So so drill bit Used to drill out exhaust manifold studs that broke off and it went dull a lot quicker than it should of. Was junk after the job was done. October 18, 2016
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