Drill bit Irwin HSS conical 30 mm, model 10502458

Irwin HSS conical drill bit, 30 mm diameter, is a single-piece high-speed steel tool designed for creating or enlarging holes with a stepped or tapered profile. The conical geometry allows controlled removal of material and smooth progression between diameters, making it suitable for drilling metals and other materials compatible with HSS tooling. The bit is intended for use in hand drills and drill presses where a 30 mm conical hole or step is required for fabrication, maintenance or repair tasks.

Advantages

The HSS construction provides good hardness and heat resistance for extended cutting life under typical drilling speeds. Conical (step) geometry permits progressive cutting and reduces the need for multiple separate sizes, enabling efficient enlarging of existing holes or forming tapered entries. The single-piece design offers rigidity and straightforward mounting in standard chucks or drill holders. Overall, the tool balances durability and ease of use for metalworking applications.

Suitable for

• Drilling and enlarging holes in carbon steel and alloy steels
• Creating stepped or tapered entries in metal plates
• Maintenance, fabrication and repair tasks requiring a 30 mm conical hole
• Use with bench drill presses and hand drills compatible with HSS bits

Key specifications

• Material: high-speed steel (HSS)
• Geometry: conical/step profile
• Nominal diameter: 30 mm
• Intended mounting: standard drill chucks and drill press holders
• Primary applications: metalworking and general fabrication

How to use

Secure the drill bit in an appropriate chuck or holder ensuring proper concentricity and tight clamping. Select a suitable cutting speed and feed for the workpiece material; use cutting fluid when drilling metals to reduce heat and extend tool life. Start the hole at low speed to establish the center, then apply steady pressure while allowing the conical profile to progress through the material. Withdraw periodically to clear chips and reapply coolant as needed. When enlarging existing holes, align the bit carefully to avoid eccentric cutting.

Usage recommendations

For best results when working with steel or other hard materials, use cutting fluid, moderate speeds appropriate for HSS, and secure workpiece clamping. Inspect the bit for wear or damage before use and replace when cutting performance degrades to maintain hole quality and safety.