Drill bit for metalwork

Begin with the material you’ll drill and the hole size you need, selecting high‑speed steel twist bits for general metalwork. Look for bits with sturdy shanks and reliable coatings, and prioritize reputable brands to ensure consistent diameter and smooth cutting. A practical starter set with a range of diameters can cover most home projects.

Key attributes include tip geometry, flute design, and material tolerances. A pointed or split‑point tip reduces wandering, while optimized flute geometry improves chip removal and cooling. HSS bits balance hardness and toughness for everyday metal drilling, while cobalt variants suit hard steels and longer life under demanding use.

DIY hobbyists benefit from versatile, affordable sets that cover common hole sizes and metals. Professionals invest in precision bits with specific coatings and tolerances for longevity and reliability. Choose according to your project scope and required accuracy.

Keep bits dry to prevent rust and wipe them after use to remove metal shavings. Lubricate during cutting with light oil to extend life and reduce heat, and store in a protective case to prevent dulling. Regularly inspect for wear and sharpen or replace dull bits promptly.

Secure the workpiece firmly and use a slow to moderate drilling speed with steady feed pressure. Use a drill press when precision matters, and always wear eye protection; avoid forcing the bit or drilling at high speeds without lubrication. Clearing chips frequently helps maintain cutting efficiency.

Avoid forcing the bit or using dull tools—this causes heat buildup and wear. Don’t drill rusty or extremely hard materials without the appropriate bit type, and never drill at high speed without lubrication. Avoid mounting irregular or unstable workpieces that can shift during drilling.