Milwaukee 48-89-2319 Cobalt St...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5.47
Milwaukee 48-89-2319 Cobalt Steel Red Helix Drill Bit

Milwaukee 48-89-2319 Cobalt Steel Red Helix Drill Bit

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Model: 48-89-2301

In Stock (leaves warehouse same day if ordered before 3pm ET)

$5.47
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Milwaukee 48-89-2319 11/32" Cobalt Steel Red Helix Drill Bit

The Milwaukee 48-89-2319 is an 11/32" Cobalt Steel Red Helix drill bit built for professionals who need dependable performance when drilling through metal. Manufactured from solid cobalt steel, this bit is engineered to withstand the heat generated during high-speed drilling in hard and abrasive materials. The 11/32" (0.3438") diameter delivers a precise, consistent hole size for repeatable results job after job. Milwaukee's Red Helix flute geometry is designed to move chips away from the cutting edge quickly, reducing heat buildup and helping the bit stay sharper longer. Whether used in a production shop or on a job site, this cobalt steel bit is built to handle demanding metalworking tasks.

Key Features

  • Trade Size: 11/32" (0.3438") diameter provides accurate, repeatable hole sizing for drilling applications that call for this exact bit size.
  • Cobalt Steel Construction: Solid cobalt steel construction resists the heat and wear generated when drilling through stainless steel, cast iron, and other hard or abrasive metals, helping the bit maintain its cutting edge over repeated use.
  • Red Helix Flute Design: Milwaukee's Red Helix flute geometry is engineered to evacuate chips more efficiently than standard flutes, helping reduce friction, keep the bit running cooler, and extend overall tool life.
  • Consistent Performance: The combination of cobalt steel material and optimized flute design allows the bit to maintain sharpness and cutting performance through extended use in demanding metalworking environments.
  • Professional-Grade Bit: Designed for tradespeople and metalworking professionals who need a reliable bit that can stand up to daily use in shops and on job sites.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Metal Fabrication and Machine Shop Work
  • Drilling Stainless Steel, Cast Iron, and Other Hard Metals
  • Industrial and Commercial Metalworking
  • Professional Trade and Jobsite Applications
  • Precision Hole Drilling in Metal Components

Why Milwaukee?

Milwaukee engineers the 48-89-2319 from solid cobalt steel and pairs it with a Red Helix flute design specifically to meet the demands of professional metalworking. This construction helps the bit resist the heat and wear that quickly degrade standard drill bits when cutting through hard or abrasive metals, translating into longer bit life and more consistent hole quality over time. For professionals who rely on their tools to perform shift after shift, a cobalt steel bit with purpose-built flute geometry like the Red Helix offers the durability and cutting performance needed to keep jobs moving without constantly swapping out worn bits.

Manufacturer Resources

Product Specs

Product Type:
Twist Drill Bit
Series:
Red Helix
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
list_batch:
MWK-20260918
Product Material:
Cobalt Steel
Product Group:
Power Tools & Accessories

Milwaukee 48-89-2301 – Frequently Asked Questions

1) Will a Milwaukee cobalt Red Helix bit drill stainless steel?
Yes. The Red Helix bits are solid cobalt steel, which holds its edge against the heat generated in hard and abrasive metals, and stainless steel and cast iron are among the materials Milwaukee calls out for it. For sheet metal, bar stock, and fabrication work in a shop or on site, this is the right bit family.
2) I need a 5/8 inch hole, not 11/32 inch - what else is there?
The Milwaukee 48-89-2319 is fixed at 11/32 inch (0.3438 inch), and the companion Milwaukee Red Helix cobalt size is 1/16 inch, so neither covers 5/8 inch. For a 5/8 inch hole, the Lenox 12111-10DGHS is a 5/8 inch diamond grit drill bit in the D/S-10Dg series. Note that it is a diamond grit bit rather than a fluted cobalt bit, so match it to the material you are drilling.
3) Should I use a cobalt bit or a standard HSS bit for drilling hard metal?
Cobalt is the choice when the material work-hardens or runs hot, stainless, cast iron, abrasive alloys, because cobalt steel keeps its hardness at the temperatures that dull plain high speed steel. For wood, plastic, and mild steel a standard HSS bit does the job for less. The Milwaukee Red Helix cobalt bits are built for the metal side of that split, with flute geometry meant to clear chips fast and keep the cutting edge cooler.
4) Why do my drill bits burn up in stainless and will the Red Helix flute help?
Bits fail in stainless mostly from heat, and heat builds when chips pack in the flute instead of clearing. The Red Helix flute geometry is cut to move chips away from the cutting edge faster than a standard flute, which lowers friction and keeps the bit running cooler. Pair that with cobalt steel and the edge survives longer in abrasive metal. Keep speed down and pressure steady and use cutting fluid for best life.
5) Is a Lenox diamond grit drill bit an alternative to the Milwaukee 48-89-2319 cobalt bit for drilling stainless steel?
No. The Milwaukee 48-89-2319 is an 11/32 inch cobalt steel bit with Red Helix flute geometry, built to cut and evacuate chips in metals such as stainless steel and cast iron. The Lenox 12111-10DGHS is a 5/8 inch diamond grit bit from the D/S-10Dg series, which abrades rather than cuts with a fluted edge and is sized at 5/8 inch. They are different cutting methods and different diameters, so they are not interchangeable in a metal drilling operation.
6) What is the decimal size of the 11/32 inch Milwaukee 48-89-2319 bit?
11/32 inch works out to 0.3438 inch. That matters if you are drilling a pilot or clearance hole to a decimal callout on a drawing rather than a fractional one.
7) Is the Milwaukee Red Helix cobalt bit a twist bit or a hole-saw style cutter?
It is a twist drill bit, cobalt steel with helical flutes, for drilling individual holes in metal. If you need a large diameter hole in hard material, that is a different tool class, for example the Lenox 12111-10DGHS diamond grit bit at 5/8 inch sold for that kind of work.
How fast can I get the Milwaukee 48-89-2301 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milwaukee 48-89-2301 come with a warranty?
Absolutely. The Milwaukee 48-89-2301 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milwaukee 48-89-2301?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Milwaukee 48-89-2301 from ZenSupply?
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