Drill Bit Art-Pol HSS straight shank 8.5 mm for metal, model 53085

Art-Pol HSS straight shank drill bit, diameter 8.5 mm, designed for drilling metal with handheld drills and drill presses. Manufactured from high-speed steel (HSS) to provide cutting strength and improved heat resistance during drilling operations. The cylindrical shank allows secure clamping in standard three-jaw chucks and drill holders used in workshops and maintenance environments. This carbide-free HSS bit is intended for creating precise holes in steel, cast iron and non-ferrous metals where reliable performance and straightforward tool compatibility are required.

Advantages

The HSS material offers a balance of hardness and toughness, reducing the risk of chipping during normal metal-drilling tasks while resisting softening at elevated cutting temperatures. The straight (cylindrical) shank is compatible with a wide range of drill chucks without requiring special adapters. The 8.5 mm diameter provides a common hole size for mechanical and assembly work, and the simple, carbide-free construction makes the bit suitable for routine workshop use and maintenance jobs.

Suitable for

• Drilling holes in mild and medium carbon steel
• Creating openings in cast iron and non-ferrous metals (aluminium, brass, copper)
• Use with handheld electric drills and benchtop drill presses
• Maintenance, repair and small-scale metal fabrication tasks

Key specifications

• Material: High-speed steel (HSS), carbon-based, without carbide tip
• Shank type: Straight / cylindrical shank for standard chucks
• Drill diameter: 8.5 mm
• Intended use: Metal drilling (steel, iron, non-ferrous metals)
• Compatibility: Handheld drills and drill presses

How to use

Secure the drill bit in the chuck, ensuring correct centring and tight clamping before starting. Use an appropriate drill speed for the workpiece material—moderate to high speeds for non-ferrous metals and lower speeds for harder steels—to balance cutting efficiency and heat generation. Apply steady, even feed pressure and use cutting fluid or lubricant when drilling tougher steels to reduce heat and prolong tool life. After completing the hole, retract the bit while the drill is running briefly to clear chips, then stop and remove the workpiece for inspection.

Usage recommendations

To maximize performance, select drill speeds and feed rates suitable for HSS bits and the specific metal being machined. Use a cutting lubricant for steel and harder alloys to extend tool life and improve finish; avoid excessive force to prevent breakage. Store the bit in a dry place to prevent corrosion and inspect for wear or chipping before use.