Irwin 62128 7/16" x 12" Aircra...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5.18
Irwin 62128 7/16" x 12" Aircraft-Length HSS Twist Drill Bit

Irwin 62128 7/16" x 12" Aircraft-Length HSS Twist Drill Bit

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Model: 62108

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

$5.18
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Irwin 62128 7/16" x 12" Aircraft-Length HSS Twist Drill Bit

The Irwin 62128 is a 7/16" x 12" aircraft-length twist drill bit built for jobs that demand serious reach. Machined from premium M-2 high-speed steel and finished in black oxide for corrosion resistance, this individually packaged twist bit pairs a 135-degree split-point tip with an extended 12" overall length so it can pass through deep framing, studs, joists, and other hard-to-reach work surfaces without repositioning the tool or drilling from both sides. The split-point geometry bites on contact with less force than a standard point, resisting the "walking" that can throw off a hole location, while the aircraft-style extended body is purpose-built for reach-critical applications rather than continuous, repetitive deep-hole drilling. Sold as a single bit rather than in a set, the Irwin 62128 is a practical addition to any drill index for electricians, plumbers, HVAC techs, and contractors who regularly need to bore through thick assemblies or awkward access points on the jobsite.

Key Features

  • Trade Size: 7/16" diameter with a 12" overall aircraft length, giving the reach needed to drill through deep or obstructed work surfaces in a single pass.
  • Durable Construction: Made from premium M-2 high-speed steel, a tool-grade alloy chosen for increased hardness and durability under repeated drilling cycles.
  • Corrosion Resistance: Black oxide finish helps resist corrosion and rust, protecting the bit's cutting edges between uses and extending overall service life.
  • 135-Degree Split-Point Tip: Starts drilling immediately with less force than a standard point and eliminates "walking" across the work surface, improving accuracy on the first pass.
  • Bit Type: Standard twist-bit profile, sold as an individual bit rather than as part of a set.
  • Usage Note: Engineered for applications that require extended reach; the manufacturer does not recommend this bit for continuous deep-drilling applications.

Technical Specifications

  • Warranty: NLW
  • Bit Type: Twist
  • Individual Vs. Set: Individual
  • Country of Origin: China

Typical Applications

  • Extended-Reach Drilling Through Studs, Joists, and Framing
  • HVAC and Plumbing Rough-In Access Holes
  • General Metalworking and Fabrication Tasks
  • Maintenance and Repair Projects Requiring Added Reach
  • Jobsite Drilling Where Repositioning the Tool Isn't Practical

Why Irwin?

Irwin manufactures the 62128 from premium M-2 high-speed steel and applies a black oxide finish to stand up to the wear and corrosion that come with everyday jobsite use. The 135-degree split-point tip is designed to deliver an immediate, accurate start with less force, cutting down on wandering bits and redrilled holes. Combined with the bit's extended 12" aircraft length, these design choices make the Irwin 62128 a dependable, purpose-built choice for professionals who need reliable, code-ready performance when standard-length bits simply can't reach the work.

Manufacturer Resources

Product Specs

Product Finish:
Black Oxide
list_batch:
IRW-20260923
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Type:
Twist Drill Bit
Product Group:
Power Tools & Accessories
Bit Type:
Twist
Individual Vs. Set (Syndigo):
INDIVIDUAL

Irwin 62108 – Frequently Asked Questions

1) What diameters do the Irwin aircraft-length HSS twist drill bits come in?
Five diameters: 1/8 inch (62108), 3/16 inch (62112ZR), 3/8 inch (62124), 7/16 inch (62128), and 1/2 inch (62132). All are individually packaged single bits, not sets, so you order the one size you need.
2) Will a 12 inch aircraft bit reach through a double stud wall or stacked joists?
That is what the aircraft length is for. The Irwin 62128 runs 12 inches overall so you can bore deep framing, studs, and joists in one pass without repositioning the drill or drilling in from both sides. On typical dimensional framing, 12 inches of bit covers several stacked members, though usable depth is always less than overall length because the chuck takes some of the shank.
3) Can I use these aircraft-length bits for continuous deep-hole drilling all day?
No. Irwin builds the aircraft-length bits for reach-critical holes, not for continuous deep-drilling production work, and says as much. If you are boring repetitive deep holes through framing all day, use a dedicated auger or ship auger bit in that size instead.
4) Will the 135 degree split point start a hole in steel without a center punch?
The 135 degree split point bites on contact with less force than a standard 118 degree point and resists walking across the surface, so it starts accurately on metal without a punch mark in most cases. On slick or hard plate, a punch is still cheap insurance. The body is M-2 high-speed steel, so the bits handle general metalworking and fabrication as well as wood framing.
5) What size aircraft bit do I need for running 12/2 or 14/2 Romex through studs?
Electricians typically reach for the 1/2 inch (62132) or 7/16 inch (62128) in this aircraft-length family for pulling cable through framing, since those give clearance for one or two runs of standard residential NM cable. The smaller 1/8 and 3/16 inch sizes are for pilot holes and metal work, not cable pulls.
6) Is this a straight shank that fits a standard 1/2 inch keyless chuck?
These are standard twist-bit profile aircraft-length bits, so the shank is round and straight. The largest size offered is 1/2 inch diameter (62132), which is at the capacity limit of a 1/2 inch chuck, so for that size confirm your drill chuck opens fully. The 7/16 inch and smaller sizes seat with room to spare.
7) Do these bits hold up in a damp truck box or a toolbox that lives on a jobsite?
The finish is black oxide, which resists rust and corrosion and protects the cutting edges between uses. It is not a plating that adds hardness, so treat it as corrosion protection rather than a wear coating like titanium nitride.
8) Where are the Irwin aircraft-length bits made?
Country of origin is China. The steel is M-2 high-speed steel with a black oxide finish.
How fast can I get the Irwin 62108 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 62108 come with a warranty?
Absolutely. The Irwin 62108 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 62108?
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 62108 from ZenSupply?
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