Model # 48-89-2329

Internet #203115299

Store SKU #1001294846

Store SO SKU #1000668950

Milwaukee 1/2 in. Cobalt Red Helix Drill Bit
0045242188444

Milwaukee

1/2 in. Cobalt Red Helix Drill Bit

  • Variable helix design for fast material removal
  • Chip breaker decreases heat build up
  • Stays sharper longer
$1797 /each
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Installation Options

Product Overview

  • Variable helix design for fast material removal
  • Chip breaker decreases heat build up
  • Stays sharper longer
The Milwaukee 48-89-2329 1/2 in. 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, which provides ultimate strength and protects against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A precision start, 135-degree Split Point tip starts on contact to keep the bit from walking for fast accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.
  • Longer life: titanium coating reduces heat build-up for up to 3x longer life
  • Extreme durability: thicker web provides greater strength
  • 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

Product Overview

  • Variable helix design for fast material removal
  • Chip breaker decreases heat build up
  • Stays sharper longer
Model #: 48-89-2329
Sku #: 1001294846
Internet #: 203115299

The Milwaukee 48-89-2329 1/2 in. 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, which provides ultimate strength and protects against side-load breakage. A specially designed parabolic flute form clears chips and debris fast to keep the bit cool. A precision start, 135-degree Split Point tip starts on contact to keep the bit from walking for fast accurate holes. Excellent for drilling on curved surfaces, requires less effort to drill and is highly recommended for use with portable drills.

  • Longer life: titanium coating reduces heat build-up for up to 3x longer life
  • Extreme durability: thicker web provides greater strength
  • 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

Info & Guides

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Specifications

Dimensions

Assembled Depth (in.)
1/2 in
Assembled Height (in.)
1/2 in
Assembled Width (in.)
5.12 in
Bit Diameter
1/2 in
Bit Length (in.)
6
Shank Diameter
3/8 in

Details

Bit Material
Cobalt
Drill Bit Type
Twist
Drill Bit Type(s) Included
Twist
Individual/Set
Individual
Material Application
Aluminum,Cast Iron,Duct/Sheet Metal,Stainless Steel,Steel
Returnable
90-Day
Self-Feeding
No
Shank Style
3-Flat
Shank Style
3-Flat
Tools Product Type
Power Tool

Specifications

Dimensions

Assembled Depth (in.)
1/2 in
Assembled Height (in.)
1/2 in
Assembled Width (in.)
5.12 in
Bit Diameter
1/2 in
Bit Length (in.)
6
Shank Diameter
3/8 in

Details

Bit Material
Cobalt
Drill Bit Type
Twist
Drill Bit Type(s) Included
Twist
Individual/Set
Individual
Material Application
Aluminum,Cast Iron,Duct/Sheet Metal,Stainless Steel,Steel
Returnable
90-Day
Self-Feeding
No
Shank Style
3-Flat
Shank Style
3-Flat
Tools Product Type
Power Tool

Questions & Answers

Question is about Thunderbolt Cobalt drill bit specifications

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.
Asked by: ztywa6
It appears that these bits are titanium coated but they are not even hardened to minimum hardness standards. As for the high speed part they overheat using cutting oil.
Answered by: Buck
Date published: 2017-12-19

Is it for steel. Top rail of a chain link fence

Is it for steel. Top rail of a chain link fence
Asked by: joe
Yes, the drill bit can be used for steel.
Answered by: CommunityAnswer
Date published: 2017-09-19

length of drill bit?

need length to be 2-1/4" min.
Asked by: Jim
It is "jobber" length. That is 3 3/4" .
Answered by: ivycat
Date published: 2017-07-17

In general what is next size bigger than 5/64 bit

Asked by: Jasonzamira
Hello Jason Zamira, glad to help. 3/32" would be the next size up. Hope this helped.
Answered by: KBecker
Date published: 2017-12-18
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Customer Reviews

1/2 in. Cobalt Red Helix Drill Bit is rated 3.8 out of 5 by 255.
Rated 1 out of 5 by from I was trying to drill a hole in a bed frame. I was able to easily drill a 1/16 pilot hole (Dewalt... I was trying to drill a hole in a bed frame. I was able to easily drill a 1/16 pilot hole (Dewalt). When I tried to use the 1/4 drill bit it was totally UNABLE to penetrate. It took a lot of angling with it and over 5 MINUTES to drill the hole through 1/16 thick steel. WASTE OF MONEY!!!!
Date published: 2017-09-22
Rated 3 out of 5 by from Bought two bits--this and one other, needed to drill... Bought two bits--this and one other, needed to drill a hole through 1/8th inch angle iron (5 ea), and a hole through 14 ga 2x2 square tube (5ea), got the job finished, but just barely. Doubt the bits are much good for anything more.
Date published: 2017-09-12
Rated 1 out of 5 by from Did not cut through the metal. Listed as a cobalt... Did not cut through the metal. Listed as a cobalt bit for Hard Metal. However, within about 10 seconds it was all chewed up. Not a good bit at all for hard metal.
Date published: 2017-09-12
Rated 5 out of 5 by from It is absolutely awesome it just drill over metal like if you drilling in to wood It is absolutely awesome it just drill over metal like if you drilling in to wood
Date published: 2017-09-16
Rated 5 out of 5 by from Great bit. Flats on the shank help prevent spinning... Great bit. Flats on the shank help prevent spinning in the chuck. I subjected it to hard duty, enlarging 3/8" holes in my trailer tongue jack and "drop leg." After damaging the jack leg, I had to cut about 2" off the end. Then I re-drilled the hole in the jack, but it was not perfectly aligned. So I used the bit to slightly enlarge and re-align the holes in the drop leg. The bit held up to this abuse. But, it was very expensive for a single bit that I may never use again. My primary complaint is that HD was out of stock on 3 other grades of bits, and this was the last one in this size in the most expensive bit. I'm not sure why 7/16" inventory is allowed to dwindle to nothing.
Date published: 2017-10-03
Rated 1 out of 5 by from Lasted four holes. I'm drilling through the metal bands of a wine barrel to place grommets. I wa... Lasted four holes. I'm drilling through the metal bands of a wine barrel to place grommets. I was using the basic ones from a Ryobi drill bit set but that one walked and took a a couple minutes for each hole. The first two holes worked well for this Milwaukee bit, then it slowed down on the third. After finally completing the fourth hole, I noticed that half the bit was gone. So much for "Hard Metal." I switched back to the Ryobi bit and finished the project slowly. Waste of money on my part.
Date published: 2017-08-20
Rated 1 out of 5 by from Not meant for hardened steel These bits are probably pretty good through soft and mild steel however they would not self start in hardened steel had to use diamond tip(also Milwaukee brand and also under preformed expectations) before it would even think of taking a bite. Package says "Hard Metal" yeah right first (and 2nd) time I have ever been disappointed with Milwaukee products, do not buy stick with Dewalt
Date published: 2017-08-11
Rated 1 out of 5 by from This drill bit failed after one hole. It didn’t seem to be hardened at all. I was drilling throug... This drill bit failed after one hole. It didn’t seem to be hardened at all. I was drilling through soft steel and was disappointed with the performance. Milwaukee has been a preferred brand for me for over 50 years; however, if your current product line is of the same standard I will not purchase another from your line.
Date published: 2017-12-19
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