Draper HSS Metric Long Drill Bit 3.0 x 100mm (10 Pack) Steel - 62997

These Draper HSS Metric Long Drill Bits are suitable for drilling into steel, cast iron, non-ferrous metals, and plastics.

No, these standard HSS bits are not designed for drilling into hardened steel. For hardened materials, specialized drill bits are required.

Use appropriate drilling speeds, apply steady pressure, and consider using a cutting lubricant. Peck drilling, where you periodically retract the bit, also helps clear chips and cool the bit.

HSS stands for High-Speed Steel, a type of tool steel known for its resistance to heat and abrasion, allowing it to cut at higher speeds than conventional carbon steel tools.

The 100mm length provides extra reach, allowing you to drill deeper holes or access areas that might be difficult to reach with standard-length drill bits.

It's best to store them in their original packaging or a dedicated drill bit organizer to protect the cutting edges from damage and to prevent rust by keeping them dry.

You can use them with a hammer drill, but only in the standard drill (non-hammer) setting. The hammer action can damage the bit and the workpiece.

Reduce drilling speed, apply less pressure, and use a cutting fluid or lubricant. Ensure you are using the correct speed for the material. Use peck drilling for deep holes to clear chips.

Ensure the bit is sharp. Check if the material being drilled is appropriate for HSS bits. Make sure the drill press or drill is not vibrating excessively. Ensure a pilot mark is made or a center punch is used for starting the hole accurately.

Reduce side pressure and avoid forcing the bit. Ensure the bit is properly centered and perpendicular to the workpiece. Do not use the hammer function on a hammer drill with these bits. Check for binding in the hole.

Ensure the drill speed and feed rate are appropriate for the material. Make sure the bit is sharp and clean. If drilling thin sheet metal, consider using a backing material.