Drill America 15/32in x 18in High Speed Steel Extra Long Drill Bit

In this review of the Drill America 15/32in x 18in DWDDL Series drill bit, the bottom line is simple: it's a straightforward, extra-length HSS twist bit for general-purpose drilling where reach matters most. The reviewer finds it best for maintenance shops, production tasks, and home mechanics who need a long flute to reach deep holes in steel or iron-family materials. Its combination of high-speed steel construction and a black oxide surface makes it a dependable option when a long, round-shank bit is required rather than specialized coatings or exotic geometries.

Key Features

• Extra length: An 18in overall length with a long flute provides the reach needed for deep holes or drilling through stacked workpieces without stepping drills or extensions.
• High-speed steel construction: Balances hardness and toughness for good wear resistance in a broad range of iron and steel family materials.
• Black oxide treatment: Adds lubricity and creates small surface pockets that help retain coolant near the cutting edge for smoother, cooler drilling.
• Round shank: Fits a wide variety of toolholding systems, making it easy to mount in drill presses and chucks that accept round shanks.
• Spiral flute geometry: Right-hand cut evacuates chips up and out of the hole to reduce clogging when run in the correct direction.

Who It's For

The Drill America 15/32in x 18in DWDDL Series is aimed at users who regularly need extended reach when drilling into metals: maintenance technicians, fabricators, and workshop owners who drill deep holes in mild steel, cast iron, or similar materials. Its simple HSS design makes it a good utility bit for production runs where cost and reach are priorities rather than specialty coatings.

Those who should look elsewhere include users who need faster cutting in stainless or hardened alloys, or who require longer tool life under high-speed CNC conditions; a coated or carbide option would be preferable for those demanding environments.

Pros & Cons

Pros

• Extra-long flute length gives access to deep or hard-to-reach holes without adapters.
• HSS construction offers a useful balance of hardness and toughness for general steel work.
• Black oxide adds lubricity and helps retain coolant at the cutting edge for better performance.
• Round shank ensures compatibility with many chucks and toolholders.

Cons

• Some users report mixed durability and sharpness, so performance can vary depending on material and feed/speed technique.
• Uncoated HSS will wear faster than coated or carbide bits in very abrasive or high-speed tasks.

Specifications

Brand	Drill America
Series	DWDDL
Diameter	15/32in
Overall length	18in
Material	High-speed steel (HSS)
Surface treatment	Black oxide
Shank type	Round shank

Our Verdict

The Drill America 15/32in x 18in HSS extra long drill bit is a pragmatic choice for anyone who needs reach and general-purpose performance in steel-family materials. It represents good value for production or maintenance tasks where a long, round-shank HSS tool is appropriate; users should expect reasonable life with proper speeds and coolant but consider stronger coatings for heavy-duty or high-speed work.

Frequently Asked Questions

Is this bit suitable for drilling stainless steel?
It will drill stainless in many cases, but because it is uncoated HSS, users should run slower speeds with ample coolant and expect faster wear than with coated or carbide bits.

Will the round shank fit my drill press?
Round shanks are compatible with most drill press chucks and many toolholders, but verify your chuck capacity before purchase.

Can this bit be re-sharpened?
Yes, HSS twist bits like this can be resharpened by a competent tool grinder to restore cutting geometry and extend life.