Drill bit for metal GRAPHITE Hex shank 8.5 mm

GRAPHITE drill bit for metal with an 8.5 mm cutting diameter and a hexagonal shank. Designed for drilling holes in steel and other ferrous and non-ferrous metals, this bit fits hex chucks, quick-change holders and impact drivers. The geometry and material of the cutting edge are optimized for use in workshop and construction environments where reliable engagement and fast bit changes are required.

Advantages

The hex shank provides secure seating in chucks and bit-holders, reducing slippage during high-torque applications. An 8.5 mm cutting diameter offers a balance between hole size and drilling speed for common metalworking tasks. The bit is compatible with impact drivers and quick-change adapters, enabling faster tool changes and improved workflow. Its design reduces chatter and enhances hole accuracy when used with appropriate speeds and cutting fluids.

Suitable for

• Drilling holes in mild and hardened steel
• Working with non-ferrous metals such as aluminium and copper
• Workshop repairs and maintenance tasks
• Construction and metal fabrication where hex shank systems are used

Key specifications

• Cutting diameter: 8.5 mm
• Shank type: hexagonal
• Intended material: ferrous and non-ferrous metals
• Compatibility: hex chucks, impact drivers, quick-change adapters

How to use

Secure the drill bit in a compatible hex chuck, impact driver or quick-change holder. Select an appropriate speed for the metal being drilled—lower speeds for harder steels, higher speeds for softer non-ferrous metals—and apply steady pressure without forcing the bit. Use cutting lubricant for steel and other hard metals to reduce heat and prolong tool life. Retract periodically to clear chips and maintain hole quality.

Usage recommendations

To extend the service life and improve performance, use cutting fluid when drilling steel, clamp workpieces securely, pre-drill pilot holes when accuracy is required, and avoid excessive side loads on the bit. Inspect the cutting edge for wear and replace the bit when chipping or significant bluntness is observed.