Drill bit for metal Smart HSS cylindrical 8.5 mm, set of 10 (24-085)

Set of 10 Smart HSS cylindrical drill bits for metal with an 8.5 mm diameter (model 24-085). Manufactured from high-speed steel (HSS), these drill bits are designed to cut through a variety of ferrous and non-ferrous metals while maintaining cutting edge integrity and dimensional consistency. The cylindrical shank fits standard drill chucks and hand drills, providing stable mounting and straightforward bit changes for common workshop and maintenance tools.

Advantages

The HSS material delivers a balance of hardness and toughness for repeated metal drilling operations, offering resistance to wear and moderate heat. The set format ensures multiple replacements or coordinated multi-hole projects without frequent regrinding. The cylindrical shank is compatible with most standard chucks, enabling use in electric drills and portable tools. Uniform 8.5 mm diameter across all ten bits guarantees consistent hole size for assembly, fastening, or repair tasks.

Suitable for

• Drilling holes in steel and cast iron
• Drilling in aluminium, brass and other non‑ferrous metals
• Workshop, maintenance and general metalworking tasks
• DIY projects requiring repeated holes of consistent diameter

Key specifications

• Material: High-speed steel (HSS)
• Diameter: 8.5 mm
• Shank type: Cylindrical (straight) shank for standard chucks
• Quantity: Set of 10 drill bits
• Intended use: Metal drilling (ferrous and non-ferrous)

How to use

Select an appropriate drill with a chuck that accepts cylindrical shanks and secure the 8.5 mm bit firmly. Mark the drilling point and, if necessary, use a center punch to prevent bit walking. Start drilling at low speed to establish the hole, then increase speed according to material hardness while applying steady, even pressure. Use cutting fluid or lubricant when drilling thicker or harder metals to reduce heat and prolong bit life. Withdraw the bit periodically to clear chips and avoid clogging.

Usage recommendations

For best results, use light cutting oil when drilling steel and maintain moderate feed pressure. Replace worn bits from the set to ensure consistent hole quality; regrind only if you have the appropriate tooling and experience. Store the set in a dry place to prevent corrosion.