Draper HSS Metric Jobber Drill Bit - 4.0 x 75mm - 10 Pack

This Draper HSS drill bit is suitable for drilling into steel, cast iron, non-ferrous metals, and plastics. It is designed for general-purpose use across these materials.

HSS stands for High-Speed Steel. It's a type of tool steel known for its hardness, resistance to deformation at high temperatures, and durability, making it ideal for drill bits.

These are international standards that specify the dimensions, tolerances, and performance characteristics for drill bits, ensuring consistent quality and compatibility.

Use the correct drill speed for the material, apply steady pressure, avoid overheating by clearing chips frequently, and use a cutting lubricant when drilling into metals.

Yes, this bit is compatible with any standard drill chuck found on electric or cordless drills. Ensure the chuck is properly tightened around the bit's shank.

A 10-pack provides excellent value and ensures you always have a sharp, readily available replacement bit, minimizing downtime on projects.

While primarily designed for metal and plastic, HSS drill bits can be used for drilling wood. However, specialized wood bits often provide cleaner results and less tear-out in wood.

Ensure the drill bit is sharp. If dull, consider replacing it. Check if you are using the correct drill speed and applying adequate pressure for the material. For metals, consider using a cutting lubricant.

Reduce drill speed. Apply less pressure and allow the bit to clear chips more frequently. Ensure you are using a cutting lubricant, especially when drilling into harder metals.

Ensure the drill bit is securely held in the chuck and is not wobbling. Use a center punch to create a starting dimple for accuracy. Verify the bit size is correct for the intended fastener.

This can be caused by excessive force, drilling at too high a speed, or encountering hard spots in the material. Reduce speed, apply steady pressure, and ensure the bit is not binding.