Drill bit Irwin 10502491 HSS Pro Long Series 6.5 mm

The Irwin 6.5 mm HSS Pro Long Series twist drill bit is designed for metalworking and general-purpose drilling where extra reach is required. Manufactured from high-speed steel, this 6.5 mm diameter bit offers heat resistance and wear durability for repeated use in steel and other metals. Its extended length enables drilling deeper holes or reaching confined locations that standard-length drills cannot access, and it is compatible with both hand drills and drill presses for professional or workshop environments.

Advantages

This HSS Pro long-series drill bit provides consistent cutting performance in metal thanks to its high-speed steel construction, which resists softening under elevated temperatures. The long flute design improves chip evacuation from deep holes and helps maintain hole quality when working at extended depths. Precision ground geometry ensures accurate centering and stable drilling, while the robust material increases service life compared with standard carbon-steel bits.

Suitable for

• Drilling through mild and medium steels
• Creating deep or hard-to-reach holes in metal components
• Use with drill presses for controlled-depth drilling
• Use with hand-held drills for workshop and field repairs

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 6.5 mm
• Series: Long-series (extended flute length for deep holes)
• Tip/point: Standard 118°-type geometry for general-purpose metal drilling
• Shank type: Straight cylindrical shank for standard drill chucks

How to use

Select the 6.5 mm HSS Pro long-series drill bit for holes that require extra reach or when accessing confined areas. Secure the workpiece with clamps or a vise to prevent movement. Fit the straight shank into a compatible drill chuck and tighten firmly. When drilling metal, start at a low speed to establish the pilot and increase speed moderately while applying steady, even pressure; use cutting fluid to reduce heat and improve chip evacuation. After completing the hole, clear chips from the flute and inspect the bit for wear before next use.

Usage recommendations

Use appropriate cutting fluid when drilling metals, avoid excessive feed pressure to prevent bit breakage, and replace the bit when signs of wear or bluntness appear to maintain drilling accuracy and surface finish.