Wood Drill Bit GRAPHITE 57H366 — Hexagonal shank, Spiral flute, 20 mm

GRAPHITE 57H366 wood drill bit is a 20 mm diameter spiral-fluted drill designed for clean, efficient drilling in timber and wood-based materials. The bit combines a spiral flute for effective chip evacuation with a hexagonal shank that fits quick-change chucks and bit holders, enabling fast tool changes and a secure grip. It is intended for general woodworking tasks where straight, accurate holes are required.

Advantages

The spiral flute removes wood chips from the bore to reduce clogging and heat build-up, improving drilling speed and hole quality. The hexagonal shank prevents slippage in quick-change systems and ensures positive engagement in impact drivers or bit holders. A 20 mm cutting diameter provides a balance between substantial hole size and manageable torque demand, suitable for most hand drills and cordless drivers. The bit's geometry is aimed at producing straight holes with reduced tear-out on exit surfaces.

Suitable for

• Drilling through softwood and hardwood
• Furniture assembly and dowel or bolt hole preparation
• Installing fixtures, door hardware and carpentry joints
• Working with plywood, chipboard and laminated boards

Key specifications

• Drill diameter: 20 mm
• Shank type: hexagonal shank for quick-change chucks and bit holders
• Flute type: spiral flute for chip evacuation
• Primary use: woodworking and general timber drilling

How to use

Secure the hexagonal shank in a compatible chuck or quick-change holder, ensuring it is fully seated and locked. Mark the drilling point on the workpiece and, if needed, clamp the workpiece to prevent movement. Start drilling at low speed to establish the hole, then increase speed as appropriate for the material. Withdraw periodically on deep holes to clear chips if necessary. Apply steady, even pressure; avoid excessive force that can cause burning or bit deflection. After drilling, inspect the hole for cleanliness and deburr any sharp edges.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and hearing protection. For best results, choose drill speeds and feed rates suited to the wood species and thickness. When working with laminated or veneered boards, consider backing the workpiece to reduce exit tear-out. Store the bit in a dry place to prevent corrosion and check for wear before use.