Drill America 19/64 in Solid Carbide Drill Bit DMOD Series - Precise

In this review the Drill America 19/64 in Solid Carbide Drill Bit from the DMOD series is assessed for machinists who need durable, accurate performance when drilling abrasive or high temperature materials. The bottom line: this bit is best for shops and experienced users who can provide rigid toolholding and careful feed rates, because its solid carbide construction gives excellent wear resistance and cutting speed but also requires cautious handling due to brittleness.

Key Features

• Solid carbide construction: offers long tool life and consistent cutting at higher speeds compared with HSS, which reduces downtime for frequent regrinds.
• Uncoated substrate: provides the raw carbide surface ideal for applications where coatings would raise temperature or interfere with tight tolerances.
• Round shank compatibility: allows use in a wide variety of toolholding systems including collets and drill chucks for flexibility in the shop.
• Right-hand spiral flute: evacuates chips up and out of the hole to minimize clogging and maintain hole quality in non-ferrous and abrasive materials.
• Manufactured to NAS 907: ensures consistent dimensional accuracy and quality suitable for precision work.

Who It's For

This drill bit is aimed at professional machinists, toolroom operators, and hobbyists who work with abrasive materials like cast iron, high silicon aluminum, bronze, copper, hard rubber, and various plastics where heat and wear are concerns. The DMOD series excels when drilling small, precise holes and when maintaining drill size under heat is important.

It is less suitable for casual users who lack rigid toolholding or those who expect a forgiving bit for heavy hand-drilling; the bits carbide brittleness means it can chip or break if used in flexible mounts or with aggressive side loads.

Pros & Cons

Pros

• Excellent wear resistance and cutting speed compared with HSS in abrasive materials.
• High accuracy and repeatability, manufactured to a recognized aerospace standard.
• Good chip evacuation from the right-hand spiral flute, keeping holes cleaner.
• Round shank fits common collets and chucks for flexible mounting.

Cons

• Carbide brittleness makes it prone to breakage if not run in rigid holders with correct feeds.
• No coating means less protection in some extreme friction conditions compared with coated carbide options.

Specifications

Our Verdict

The Drill America 19/64 in DMOD solid carbide drill is a practical choice for users who need precision drilling in abrasive or heat-prone materials and can supply stiff, accurate toolholding. It delivers strong wear life and hole accuracy, offering good value for professional shops and skilled hobbyists, provided the user respects carbides fragility and matches feeds and fixturing accordingly.

Frequently Asked Questions

Can this bit be used on steel?
It will cut through some hardened steel with the correct speeds, but it is optimized for abrasive and non-ferrous materials.

Do I need a special holder for the round shank?
No special holder is required; the round shank works in common collets and drill chucks, but rigid, accurate holding is recommended.

Is the bit coated for extra life?
No, this DMOD series bit is uncoated, providing the base carbide substrate for applications that need the raw material surface.