Draper HSS Metric Jobber Drill Bit - 1.5mm x 40mm - 10 Pack

This Draper HSS drill bit is suitable for steel, cast iron, non-ferrous metals (like aluminum, brass, copper), and plastics.

Lubrication is highly recommended when drilling into steel and cast iron to reduce heat and friction, prolonging the bit's life and improving cut quality. It's less critical but still beneficial for non-ferrous metals.

High-Speed Steel (HSS) offers a good balance of hardness, toughness, and heat resistance, making it suitable for a wide range of general-purpose drilling tasks. Other materials like Cobalt offer superior heat resistance for very hard metals.

Avoid overheating by using appropriate speeds and lubrication. Use steady pressure and avoid excessive force. Store bits properly to prevent damage and rust.

While technically possible, this is a general-purpose metal drill bit. For wood, wood-specific drill bits (like brad-point bits) provide better results and cleaner holes.

Jobber length bits are a standard length, shorter than 'long series' bits but longer than 'stubby' bits. They offer a good compromise between reach and rigidity for general use.

New bits are manufactured to precise standards and should be sharp. If you suspect a bit is not sharp, check for any burrs or damage, or consider it may have been dulled during prior use or handling.

Use a center punch to create a small indentation at the drilling start point. Ensure the material is securely clamped and the drill is held perpendicular to the surface.

Reduce drilling speed. Apply cutting lubricant, especially for metals. Withdraw the bit periodically to clear chips and allow cooling.

Adjust drill speed: slower for harder materials, faster for softer. Ensure the bit is sharp. For plastics, consider using a brad-point bit if available for cleaner entry.

Excessive force or drilling at too steep an angle can cause breakage. Ensure steady pressure and maintain a 90-degree angle to the workpiece. Avoid forcing the bit; let its sharpness do the work.