Drill Bit Set Irwin HSS-R DIN338 for Metal, 19 pcs, sizes 1–9.5 mm (step increments 0.5 mm)

Irwin HSS-R DIN338 19-piece drill bit set for metal includes ground high-speed steel bits in metric sizes from 1.0 mm to 9.5 mm with 0.5 mm step increments. The set uses DIN338 geometry, providing a robust point and improved chip evacuation for drilling steel and other ferrous materials. Supplied as a comprehensive metric assortment, this kit is intended for general workshop, maintenance and metal fabrication tasks where precision holemaking and consistent performance are required.

Advantages

The HSS-R material delivers heat resistance and wear performance suitable for intermittent drilling in steel and similar metals; ground flutes and point geometry improve concentricity and reduce walking at startup. The 0.5 mm incremental range gives close size selection for precise fitment, reducing the need for reaming or corrective operations. Overall construction and DIN338 geometry balance rigidity and chip removal to maintain cutting action during typical workshop and maintenance use.

Suitable for

• Drilling holes in carbon steel, alloy steel and other ferrous materials
• Maintenance and repair tasks in workshops and industrial settings
• Metal fabrication, fitting and assembly requiring metric hole sizes
• Prototype and small-batch production where a range of sizes is needed

Key specifications

• Material: High-speed steel (HSS-R), ground
• Geometry: DIN338 point and flute design for metalworking
• Number of pieces: 19
• Size range: 1.0 mm to 9.5 mm in 0.5 mm increments
• Coating: uncoated (standard HSS finish)
• Intended application: drilling ferrous metals and general metalworking

How to use

Select the drill bit size that matches the required hole diameter and secure the bit in the drill chuck ensuring correct seating and runout reduction. Mark the drilling position and, where necessary, use a centre punch to prevent walking. Begin drilling at low speed to establish the hole, then increase speed appropriate to the bit size and material hardness while applying steady feed and moderate pressure. Use cutting fluid for drilling steel to improve cooling and chip evacuation, and clear chips frequently to prevent clogging of the flutes.

Usage recommendations

For best results when drilling steel, use a suitable cutting lubricant, moderate speeds and a firm stable setup. Replace worn or damaged bits to maintain hole quality. Store the set in its case or holder to protect cutting edges and ensure accurate size selection for future jobs.