Drill bit GRAPHITE 18 mm cylindrical (57H326) for metal and wood

GRAPHITE cylindrical drill bit 18 mm (model 57H326) is designed for general-purpose drilling in metal and wood. The tool features an 18 mm cutting diameter and a cylindrical shank that enables secure clamping in standard chucks of hand drills and drill presses. Its geometry and construction make it suitable for routine construction, repair and workshop tasks where medium-large holes are required.

Advantages

The cylindrical shank provides stable fixation in chucks, reducing slippage during operation. The 18 mm cutting diameter delivers a balance between material removal rate and hole precision for a wide range of applications. The bit is compatible with both manual and powered drilling equipment, which simplifies tool selection for mixed workshop use. Its design supports effective chip evacuation when used in recommended conditions.

Suitable for

• Drilling holes in mild and alloy steels
• Drilling through hardwoods and softwoods
• Workshop and site repair tasks
• Use with hand drills and drill presses

Key specifications

• Cutting diameter: 18 mm
• Shank type: cylindrical
• Intended materials: metal and wood
• Typical applications: construction, repair, workshop drilling

How to use

Secure the drill bit in the drill chuck ensuring the cylindrical shank is fully inserted and clamped to prevent run-out. Select appropriate spindle speed for the material: lower speeds for metals and higher speeds for wood, and apply steady feed pressure. Use cutting or drilling lubricant when working with metal to extend tool life and improve chip flow. Clear chips periodically to avoid clogging and overheating. Ensure the workpiece is properly fixed before drilling to maintain accuracy and safety.

Usage recommendations

For best results, match drill speed and feed to the material: use moderate speeds and cutting fluid for metal, and higher speeds with light feed in wood. Inspect the bit before use for wear or damage and replace when the cutting edge is dull to avoid poor hole quality and increased load on the drill.