Irwin 3016013 13/64" Cobalt Jo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1.56
Irwin 3016013 13/64" Cobalt Jobber Drill Bit, 135° Split Point

Irwin 3016013 13/64" Cobalt Jobber Drill Bit, 135° Split Point

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Model: 3016011

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

$1.56
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Irwin 3016013 13/64" Cobalt Jobber Drill Bit, 135° Split Point

The Irwin 3016013 13/64" Cobalt Jobber Drill Bit is a heavy-duty cobalt alloy steel bit engineered for drilling through abrasive alloy metal and hardened steel. Built with shock-resistant, heat-treated S2/cobalt alloy steel construction and a 135° split-point tip, this jobber-length bit resists walking on contact for precise, on-target starts. Sized at 13/64" (0.2031") with an overall length of 3-5/8", it's designed for demanding maintenance and repair work in metalworking, fabrication, and industrial applications where reliable hole quality is essential.

Key Features

  • Trade Size: 13/64" diameter with a 3-5/8" overall jobber length for standard drill chucks.
  • Durable Construction: Cobalt Alloy Steel (S2 steel base) for maximum strength, hardness, and resistance to heat and abrasion.
  • Precise Drilling: 135° split-point tip eliminates walking for accurate, on-center starts.
  • Heavy-Duty Use: Tackles metal drilling, including abrasive alloy metal drilling on hardened steel.
  • Bit Type: Cobalt Jobber bit sold as an individual unit.
  • Material Composition: Manufactured from shock-resistant, heat-treated S2 tool steel with a cobalt alloy formulation for superior wear resistance.

Technical Specifications

  • Bit Type: Cobalt Jobber
  • Size: 13/64 in
  • Overall Length: 3-5/8"
  • Product Primary Material: Cobalt Alloy Steel
  • Product Material Group: Metal
  • Individual Vs. Set: Individual
  • Power Source: Non-Energy Using
  • Warranty: None
  • Claims Needed: No
  • Battery Included: No
  • Country of Origin: China

Typical Applications

  • Metal Drilling and Fabrication
  • Hardened Steel and Alloy Metal Drilling
  • Maintenance and Repair Work
  • Machine Shop and Industrial Tooling

Why Irwin?

Irwin engineers this 13/64" cobalt jobber bit from heat-treated, shock-resistant S2/cobalt alloy steel to stand up to abrasive alloy metal and hardened steel drilling. The 135° split-point tip delivers accurate starts without walking, making this bit a dependable choice for maintenance, repair, and metalworking professionals who need consistent hole quality. As part of Irwin's cobalt drill bit line, it's built for professionals who demand precision and longevity from their metal-drilling tools.

Manufacturer Resources

Product Specs

Product Type:
Twist Drill Bit
list_batch:
IRW-20260923
Product Material:
Cobalt Alloy Steel
Product Subgroup:
Drill & Driver Bits
Department:
Electrical
Product Height:
0.2 inches
Product Width:
1.9 inches
Product Group:
Power Tools & Accessories
Individual Vs. Set (Syndigo):
INDIVIDUAL
Bit Type:
Cobalt Jobber
Product Primary Material:
Cobalt Alloy Steel
Battery Included:
No
Power Source:
NON-ENERGY USING
Product Material Group:
METAL
Claims Needed:
No
Product Length:
5.8 in

Irwin 3016011 – Frequently Asked Questions

1) Will a 13/64 inch cobalt jobber bit drill hardened steel and stainless-type alloys, or do I need carbide?
Cobalt alloy steel is what you want for abrasive alloy metal and hardened steel. The Irwin 3016013 is built from heat-treated, shock-resistant S2/cobalt alloy steel, which holds its edge as the hole heats up instead of burning off like a plain HSS bit. It is aimed at metal drilling, fabrication, machine shop work, and maintenance and repair. For cutting through hardened fasteners, bolts, and alloy plate in a hand drill or drill press, this is the right class of bit.
2) What sizes does the Irwin 3016 cobalt jobber drill bit come in, and what are the part numbers?
Two sizes: 11/64 inch, which is part number 3016011, and 13/64 inch, part number 3016013. Both are single bits, not a set, so order by the fraction size you need. The 13/64 inch measures 0.2031 inch decimal, which is the standard tap-drill size commonly used ahead of a 1/4-20 tap.
3) Why does a 135 degree split point matter when drilling steel?
A 135 degree split point starts cutting the moment it touches the work, so the bit does not skate across a smooth steel surface the way a standard 118 degree point does. On the Irwin 3016013 that means you can start an on-center hole in alloy or hardened steel without a center punch or pilot hole in many cases, and the split point also cuts chip load so it pushes less and clears better in a hand drill.
4) Do I get one bit or a set when I order the Irwin 3016013?
One bit. The 3016 cobalt jobber bits are sold as individual units, so a shop standardizing on a size for repeat tap-drill or fastener work orders the quantity it needs of that single size rather than buying an index.
5) Will this cobalt bit work in an impact driver?
No. It has a round straight shank for a drill chuck, not a 1/4 inch hex quick-change shank, so it will not lock into an impact driver collet. Run it in a drill or drill press. It is a non-powered cutting tool with no battery involved.
6) Can I use a cobalt jobber bit on wood or plastic, or is it metal only?
It will cut wood and plastic, but it is ground for metal. The Irwin 3016013 is a metal-drilling bit built for alloy and hardened steel in fabrication, machine shop, and MRO work. In wood the 135 degree split point tends to leave a rougher hole than a brad point, so keep cobalt bits for the metal work where they pay for themselves.
How fast can I get the Irwin 3016011 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 3016011 come with a warranty?
Absolutely. The Irwin 3016011 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 3016011?
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 3016011 from ZenSupply?
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