Description

24 Inch Drill Bit for Professional Deep Drilling

The 24 inch drill bit is built for tough, hard-to-reach tasks. Made from high-speed steel with a 118-degree point, it delivers smooth, precise holes. Its rugged design works in both portable and machine drills, excelling in deep drilling through high-tensile alloy steels.

24 HSS Extra Long Drill is Built with Strength and Versatility

This tool works in both handheld and fixed spindle setups, delivering the durability and reach professionals need. The extra long drill bit straight design ensures clean performance, while a long drill bit straight shank provides compatibility with multiple drill types.

HSS Extra Long Drill Bit for Heavy-Duty Jobs extra long drill bit straight

For extreme depth, the extra long hss drill bit offers the toughness for repeated use. Models like the 24″ hss extra long drill excel in demanding jobs, making them a trusted choice for contractors and industrial users.
 

24 Inch Drill Bit

What size drill bit is 24?

A #24 drill bit measures 0.1520 inches in diameter, or about 3.86 mm. It’s often used for tapping #10-24 screws in metalworking and precision drilling.


What is the longest drill bit I can get?

The longest standard drill bits available are extra long drill bits, which can reach up to 36 inches in length. For specialized industrial work, custom bits may be manufactured even longer.


What is the biggest drill bit size?

In general use, drill bits are available up to about 1-1/2 inches in diameter for handheld drills. In industrial and construction settings, specialized boring bits and augers can exceed 6 inches or more in size.


What is the hardest drill bit you can get? 

The hardest drill bits are typically made from tungsten carbide or cobalt HSS (high-speed steel). Carbide bits are extremely durable and excel at drilling through hardened steel, tile, masonry, and other tough materials.

Additional information

Diameter Size

Various (See Above)

For Use On

Metal, Plastics, Wood

Flute Length

Various (See Above)

Overall Length

24

Size Type

Fractional

FAQ's: Extra Long Drill Bits

Yes—available in both measurement systems depending on the application.

Slower speeds for larger diameters and harder materials, higher speeds for small diameters in softer materials.

Yes—if they are HSS or cobalt. Carbide-tipped versions may require professional sharpening.

Aircraft extension bits are much longer and designed for deep or hard-to-reach drilling, while jobber bits are standard length for general drilling.

Use protective sleeves, racks, or cases to prevent bending and tip damage.

They can if misused—avoid side pressure, excessive speed, or forcing the cut.

Start with a short pilot hole using a standard-length bit, then switch to the extra long bit for full depth.

Yes, but longer bits flex more—keep speeds moderate and apply steady, even pressure.

Yes—use cobalt or carbide-tipped versions for hard metals like stainless steel, and apply lubrication.

Typically high-speed steel (HSS) for general use, cobalt for hard metals, and carbide-tipped for masonry or abrasive materials.

Commonly available from 6 inches, 8 inches, 9 inches, 10 inches, 12 inches, 15 inches, 18 inches, 24 inches, 36 inches, 48 inches, 60 inches & 72 inches with “aircraft extension” bits even longer.

Drill bits with an extended flute and shank length designed to reach deep or hard-to-access areas while maintaining hole accuracy.

Long bits are used to drill through thick materials, reach into tight or recessed areas, or pass through multiple layers in one go.

They’re often called “extra long drill bits” or “jobber-length,” “ship auger,” or “aircraft extension” bits depending on the design and purpose.

Yes. Drill bit extenders hold the bit securely and add extra reach—great for tight spots or deep holes.

You can use a drill bit extender or flexible shaft attachment to add reach without buying a new bit length.

Yes. Extra long bits are available in various types—twist, auger, spade, and ship auger—ranging from 6 inches up to 48 inches or more.

Not always. Longer bits reach deeper spots, but they can flex more and may be harder to control. Use the shortest bit that still gets the job done.

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