Model # 48-89-2304

Internet #203115290

Store SKU #1001294887

Store SO SKU #1000670096

Milwaukee 7/64 in. Thunderbolt Cobalt Drill Bit
0045242188192

Milwaukee

7/64 in. Thunderbolt Cobalt Drill Bit

  • Variable helix design for fast material removal
  • Chip breaker decreases heat build up
  • Stays sharper longer
$2.77 /each

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Product Overview

The Milwaukee 48-89-2304 Thunderbolt Cobalt coated drill bits (2-Pack) are designed for extreme durability and long life. 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. Two per package.

  • Thunderbolt web, provides longer life and faster driller times
  • Parabolic flute, clears chips faster
  • 136-degree split point, precision start no walking
  • Specialty bit for cast iron and stainless steel

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Customer Questions & Answers

2 Questions2 Answers

Customer Questions & Answers

7/64 in. Thunderbolt Cobalt Drill Bit
7/64 in. Thunderbolt Cobalt 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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  • 2016-10-31 T00:05:27.821-05:00
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Customer Reviews

Rated 4.1 out of 5 by 62 reviewers.
Rated 5.0 out of 5.0 by Good quality bit. I needed this to replace some bits that had been broken. I used this mostly for drilling pilot holes through wall studs. After numerous uses it has stayed straight and sharp. Its gotten pretty heated up a few times but it hasn't bent in the slightest yet. I'm happy with how its held up and I plan on looking for more of these Cobalt Red Helix bits. I definitely recommend them. July 7, 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 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
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 4.0 out of 5.0 by Good Quality Hardened steel drill bit. This drill bit has a thicker center core then standard drill bits and is able to withstand more pressure applied to the bit while drilling especially when drilling into hard materials like steel. The 135 degree split point angle helps to prevent this drill bit from walking when drilling into steel and other hard materials. This drill bit easily drills through steel and also easily drills through other materials including wood, plastic, and aluminum. This bit has 3 flats machined into the drill chuck end to allow the bit to lock in securely into a drill chuck without slippage. February 3, 2016
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 4.0 out of 5.0 by Good Quality Hardened steel drill bit. Received two drill bits in the package which is pictured differently then the package on the website that shows only one drill bit. This drill bit has a thicker center core then standard drill bits and is able to withstand more pressure applied to the bit while drilling especially when drilling into hard materials like steel. The 135 degree split point angle helps to prevent this drill bit from walking when drilling into steel and other hard materials. Was able to easily drill a hole through the center of a thick wall galvanized steel pipe using the 1/8" diameter drill bit with less effort then with using a standard drill bit. This drill bit also drills easily through other materials including wood, plastic, and aluminum. February 3, 2016
  • 2016-10-30 T22:24:41.192-05:00
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