27/64 in x 18 in High Speed Steel Extra Long Drill Bit - Extra Reach

In this review the Drill America 27/64 in x 18 in DWDDL series drill bit is judged as a no-nonsense option for anyone who needs extra reach for general purpose drilling in iron and steel family materials. The biggest reason to consider it is simple: the extra-long 18 in flute length lets you reach deep or awkward spots that standard bits cannot, while the high-speed steel construction balances hardness and toughness for wear resistance. This review focuses on performance, durability, and practical tradeoffs for workshop and maintenance use.

Key Features

• Extra length: The 18 in overall length provides exceptional reach for drilling through stacked workpieces or into tight, deep cavities where standard bits fall short.
• High-speed steel: HSS construction offers a practical balance of hardness and toughness, making the bit suitable for a broad range of steels and iron materials.
• Black oxide treatment: The black oxide finish adds lubricity and helps trap coolant near the cutting edge to aid cutting life and reduce friction.
• Spiral flutes: Right-hand spiral flutes evacuate chips up and out of the hole when run counterclockwise, reducing clogging on longer cuts.
• Round shank: The round shank fits a wide variety of toolholding systems so it can be used in many drills and chucks without special adapters.
• Bright finish option noted: Parts of the DWDDL family feature a bright finish for improved chip evacuation on routine production tasks.

Who It's For

The DWDDL 27/64 in x 18 in bit is aimed at shop technicians, maintenance crews, and fabricators who need extra reach for drilling into stacks, jigs, fixtures, or recessed features. Its HSS build makes it a good fit for frequent general purpose work in ferrous materials where a balance of wear resistance and toughness is required.

Those who should look elsewhere include users who need coated carbide performance for abrasive or high-speed stainless work, or people who require guaranteed breakage resistance in heavy production without frequent replacement; some customers report mixed durability under heavy side load or misalignment.

Pros & Cons

Pros

• Extra-long length provides reach for deep holes and awkward setups.
• HSS material and black oxide give a useful mix of hardness, toughness, and lubricity for steel-family materials.
• Round shank and spiral flutes make it compatible with many chucks and help clear chips efficiently.

Cons

• Durability is mixed in user reports; some buyers experienced breakage when used under heavy side loads or without proper support.
• Not optimized for high-speed stainless or very abrasive alloys where carbide or special coatings would last longer.

Specifications

Brand	Drill America
Series	DWDDL
Diameter	27/64 in
Overall length	18 in
Material	High-speed steel (HSS)
Finish / treatment	Black oxide (lubricity and coolant retention)
Shank	Round shank

Our Verdict

The Drill America 27/64 in x 18 in DWDDL HSS extra long drill bit is a practical, value-minded choice for users who need reliable extra reach when working in iron and steel family materials. It performs well for general purpose drilling, clears chips effectively, and fits common toolholding systems, making it a sensible buy for maintenance shops and fabricators who accept the occasional tradeoff in extreme durability under abuse.

Frequently Asked Questions

Can this bit be used in a portable drill?
Yes, the round shank fits many standard chucks, but ensure the drill has enough torque and support for the 18 in length to avoid wandering or breakage.

What materials is it suitable for?
It is designed for general purpose drilling in the iron and steel families and will work in a broad range of those materials.

Does the black oxide finish improve life?
The black oxide adds lubricity and helps retain coolant near the cutting edge, which can improve cutting life compared with unprotected HSS in similar conditions.