When choosing machinist drill bits, reliability, wear resistance, and precision matter most. The following selections cover a range of tools designed for metal, wood, and plastic work, with features like 135-degree split points, cobalt alloys, and durable indexing storage. This guide highlights five sets that are well-suited for professional workshops and serious hobbyists alike, helping you drill faster with less walking and longer tool life.
| Product | Brand | Key Strength |
|---|---|---|
| Champion Brute Platinum 29-Piece | Champion | 135° split point, water resistant, rugged XL28 design |
| GMTOOLS 115Pcs Cobalt Set | GMTOOLS | Comprehensive sizes, self-centering, indexing storage |
| SEDIANAS 115Pcs Cobalt Set | SEDIANAS | M35 cobalt, wide range, 1/16″-1/2″ and A-Z, #1-60 |
| COMOWARE 60pcs Set | COMOWARE | 135° split point, black & gold coating, full range |
| Drill America KFD29J-PC 29-Piece | Drill America | Compact set, 1/16″-1/2″, corrosion-resistant finish |
Champion Brute Platinum 29-Piece Drill Bit Set
The Champion Brute Platinum set features 29 pieces from 1/16″ to 1/2″ with 64ths increments, suitable for light to medium metal fabrication. Its 135-degree split point and tapered web geometry promote clean entry and reduced walking on hard materials. The design emphasizes durability with a water-resistant index and flat shanks for fast chucking in power tools, helping users achieve consistent results in challenging materials.
GMTOOLS 115Pcs Cobalt Drill Bits Set
This GMTOOLS set combines 115 pieces across fractional, letter, and wire sizes, all crafted in M35 cobalt HSS. The cobalt alloy delivers enhanced heat resistance and hardness for drilling hardened metals, stainless steel, and cast iron, while the self-centering 135-degree split point minimizes wandering. The metal indexed storage box aids organization and quick access in busy shops.
SEDIANAS 115Pcs Cobalt Drill Bit Set
The SEDIANAS set emphasizes M35 cobalt high-speed steel for superior heat resistance and longevity. It includes 1/16″-1/2″ sizes, A-Z and #1-60 ranges, all organized in a sturdy metal index box. The 135° split point and full-ground design facilitate faster, more precise drilling through hard metals, reducing the risk of walk-off during setup.
COMOWARE 60pcs Number Drill Bit Set
The COMOWARE set covers a broad range with standard wire sizes #1-#60 and fractional 1/16″ to 1/2″, all in black and gold coated HSS. Its 135-degree split point reduces walking and improves hole accuracy, while the coating boosts corrosion resistance and heat tolerance for durable performance in metals, plastics, and wood.
CGMTOOLS 115Pcs Cobalt Drill Set
Note: This entry reiterates GMTOOLS’ 115-piece cobalt set emphasizing a wide range of sizes, self-centering features, and an organized indexed case. The 135-degree tip and twist design promote fast drilling while maintaining control and minimizing heat generation in tough materials.
Buying Guide
Key considerations when choosing machinist drill bits include material, point geometry, and shank design. M35 cobalt bits excel at high-hardness metals like stainless steel and cast iron, offering superior heat resistance and longer service life. A 135-degree split point supports self-centering entry and reduced walking, especially on hard metals. Full-ground or tapered web designs help chip evacuation and reduce friction, improving cutting speed. Coatings such as gold titanium or black nitride can extend service life by improving lubrication retention and corrosion resistance. For shop organization, consider indexed storage and uniform shank types compatible with your drill chuck or power tool.
Size coverage matters too. Sets with fractional (1/16″ to 1/2″), letter (A–Z), and number (1–60) ranges provide flexibility across metalworking tasks. For portable use, look for a compact case with labeled compartments and secure lids. Finally, assess the intended metals and materials. Very hard or decorative alloys may demand premium cobalt or more specialized carbide bits, while soft plastics and wood can tolerate standard HSS options.