1/8 in x 18 in High Speed Steel Extra Long Drill Bit - Extra Reach

In this review the 1/8 in x 18 in high speed steel extra long drill bit is judged as a practical choice for jobs requiring extra reach and general purpose drilling in iron and steel materials. The bottom line: it is best for maintenance shops, fabricators, and hobbyists who need a dependable long-reach twist drill that balances hardness with toughness. The single biggest reason to buy is its extra length combined with a high-speed steel construction and black oxide surface treatment, which together improve chip evacuation and coolant retention during extended cuts.

Key Features

• Extra long 18 in length: Provides the extended reach needed to drill through deep assemblies or reach awkward spots without dismantling parts.
• High speed steel construction: Offers a mix of hardness and toughness for wear resistance across a broad range of iron and steel family materials.
• Black oxide finish: Adds lubricity and helps hold coolant near the cutting edge to reduce heat buildup during long cuts.
• Spiral fluted, right-hand cut: Evacuates chips up and out of the hole to reduce clogging and keep holes cleaner while drilling.
• Round shank: Fits a wide variety of toolholding systems so it can be used in drills and holders commonly found in maintenance shops.

Who It's For

The drill bit is aimed at users who routinely work with iron and steel and need extra reach for through-holes or deep fixtures, including maintenance technicians, metal fabricators, and serious hobbyists. Its general purpose HSS design makes it a sensible single-bit option for production or repair work where a long length is a priority.

Users who primarily drill softer materials like wood or plastics and who rarely need extended reach may find a shorter, more rigid bit preferable, and those needing extreme wear resistance or higher cutting speeds should consider coated or carbide options instead.

Pros & Cons

Pros

• Good balance of hardness and toughness from the high speed steel substrate for general metal drilling.
• Black oxide treatment adds lubricity and helps retain coolant at the cutting edge during longer cuts.
• Extra 18 in length solves access issues in deep or awkward assemblies without disassembly.
• Round shank fits common toolholding systems for versatile use.

Cons

• Extra length can reduce rigidity compared with shorter bits, making it more prone to deflection or breakage under heavy side loads.
• Some customers report mixed durability and accuracy when pushing through very thick material, so care is required on demanding jobs.

Specifications

Our Verdict

For anyone who needs an extra long twist drill for iron and steel, this 1/8 in x 18 in HSS bit is a practical, cost-conscious choice that delivers good chip evacuation and coolant retention thanks to its black oxide finish. It offers solid value for maintenance and fabrication tasks where reach matters, but users should expect less rigidity than shorter bits and take care when drilling thick or very hard stock.

Frequently Asked Questions

Can this bit be used in regular corded drills?
Yes, the round shank allows use in many standard drill chucks and holders, but ensure the chuck grips the round shank securely to avoid slippage.

Is this suitable for stainless steel?
It is designed for a broad range of iron and steel family materials; stainless steel may work but requires slower speeds and more coolant to avoid premature wear.

Will the extra length cause breakage?
Extra length reduces rigidity and increases risk of deflection or breakage if side load or excessive feed is applied, so use steady feed and proper support.