Irwin 63904 3/16" TiN-Coated J...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.32
Irwin 63904 3/16" TiN-Coated Jobber Length Drill Bit, 135° Split Point, 639 Series

Irwin 63904 3/16" TiN-Coated Jobber Length Drill Bit, 135° Split Point, 639 Series

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Model: 63912

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

$2.32
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Irwin 63904 3/16" TiN-Coated Jobber Length Drill Bit, 135° Split Point, 639 Series

The Irwin 63904 is a 3/16" jobber length drill bit from the 639 Series, featuring a titanium nitride (TiN) coating and a 135° split point engineered for reliable metal drilling. The 639 Series lineup also includes the 63912 model, giving shops and jobsites a choice of jobber bits built on the same heavy-duty web design, reduced-torque cutting lips, and TiN coating for extended tool life. Whether you're working in a professional shop or tackling a demanding home project, the 63904 is built to hold an edge and deliver consistent, clean holes drilling after drilling. Manufactured in China and shipped individually carded, the 63904 is ready for retail display or direct replacement stocking in professional tool cribs.

Key Features

  • Trade Size: 3/16" jobber length bit sized for standard drilling applications in metal.
  • Reduced-Torque Cutting Lips: Shorter cutting lips reduce torque when drilling in high tensile strength materials, making the bit easier to control under load.
  • 135° Split Point: The self-centering split point tip reduces feed pressure for easier penetration into the workpiece without work hardening the surrounding material.
  • Titanium Nitride (TiN) Coating: The TiN coating extends the life of the bit, lasting up to six times longer than standard high speed steel drill bits.
  • Heavy-Duty Web Design: A reinforced web design provides extreme rigidity, helping the bit stay true and resist flex when drilling in metal applications.
  • 639 Series Lineup: Offered alongside the 63912 model, giving buyers a choice of jobber bits built to the same TiN-coated, split-point specification.
  • Individually Carded: Packaged individually on a card for easy retail display, inventory tracking, and replacement stocking on the job or in the shop.

Technical Specifications

  • Warranty: NLW
  • Bit Type: Jobber
  • Country of Origin: China

Typical Applications

  • Drilling in High Tensile Strength Metals
  • Metal Fabrication and Machining
  • Automotive and Industrial Repair Work
  • General Metalworking and Maintenance Projects
  • Professional Shop and Jobsite Drilling Tasks

Why Irwin?

Irwin builds the 639 Series, including the 63904 and 63912 models, around a titanium nitride coating and a heavy-duty web design so the bit can stand up to repeated use in demanding metal drilling applications. The 135° split point and shorter cutting lips work together to cut feed pressure and torque, helping the bit resist work hardening while extending its usable life well beyond standard high speed steel bits. For professionals and serious DIYers who need a jobber bit they can count on for high tensile strength materials, the Irwin 63904 delivers durable, code-shop-ready performance backed by a NLW warranty.

Manufacturer Resources

Product Specs

Warranty:
NLW
Bit Type:
Jobber
Individual Vs. Set (Syndigo):
INDIVIDUAL
list_batch:
IRW-20260923
Product Type:
Twist Drill Bit
Product Finish:
Titanium Nitride (TiN) Coating
Series:
639 Series
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Size:
3/16"
Product Width:
1.9 inches
Product Height:
0.2 inches
Product Group:
Power Tools & Accessories
Product Length:
5.8 in

Irwin 63912 – Frequently Asked Questions

1) Will the Irwin 639 Series TiN drill bit cut stainless and other high tensile strength metals?
Yes, that is what the 639 Series jobber bit is built for. The cutting lips are shortened to reduce torque in high tensile strength materials, and the heavy duty web keeps the bit rigid so it stays true instead of flexing in metal. Typical work is metal fabrication and machining, automotive and industrial repair, and general maintenance drilling.
2) What does the 135 degree split point on the Irwin 639 Series bit actually do for me?
It self-centers, so the bit bites where you put it without a center punch walk, and it cuts the feed pressure you have to lean on. Less pressure also means less chance of work hardening the metal around the hole, which is what kills a bit on stainless. A standard 118 degree point does not self-center the same way.
3) Is a TiN coated bit worth it over a plain high speed steel drill bit?
For repeated metal drilling, yes. The titanium nitride coating on the 639 Series is rated to last up to six times longer than a standard high speed steel bit. On wood or occasional light duty the difference is not worth paying for; in a shop drilling steel day in and day out it is.
4) What is a jobber length drill bit and will it reach through what I am drilling?
Jobber is the standard general-purpose length, the one that comes in most index sets, so it suits ordinary plate, tube and bracket work. The 639 Series is a jobber bit. If you need to reach through a deep recess or past an obstruction you want a long series or extension bit instead; for stub-short holes in thick stock a screw machine length is stiffer.
5) Does the Irwin 639 Series drill bit come as a single bit or in a set?
Single. Each 639 Series bit ships individually carded, one bit per card, which suits retail display and straight replacement stocking in a tool crib. If you need a range of diameters you order them one at a time rather than as an index.
6) What diameters does the Irwin 639 Series jobber bit come in?
Two diameters are offered in the 639 Series, 1/16 inch and 3/16 inch, ordered as part numbers 63904 and 63912. Both are built to the same spec: TiN coating, 135 degree split point, heavy duty web.
7) Will the Irwin 639 Series bit fit a standard keyless chuck on a cordless drill?
Yes. These are straight shank jobber bits in small diameters, 1/16 and 3/16 inch, well inside the capacity of a standard 3/8 inch or 1/2 inch keyless chuck. No adapter or hex shank holder is needed.
8) Where is the Irwin 639 Series drill bit made?
China. That matters for buyers with country-of-origin reporting on a job, so it is worth noting on a submittal if your contract calls for it.
How fast can I get the Irwin 63912 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 Irwin 63912 come with a warranty?
Absolutely. The Irwin 63912 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 Irwin 63912?
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 Irwin 63912 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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