Sealey Step Drill Bit - HSS M2 - 4-22mm

This bit is primarily designed for sheet metal, plastics, and thin-walled materials. It can also be used on wood.

The bit can create holes ranging from 4mm up to 22mm in diameter.

Clean swarf from the flutes after use, store it in its case, and consider using cutting fluid for metal applications to prolong its life.

The ideal speed depends on the material and diameter. Generally, use slower speeds for larger diameters and harder materials, and faster speeds for smaller diameters and softer materials. Consult a drilling speed chart for specific recommendations.

While it can enlarge existing holes, it is not specifically designed as a reaming tool. For precise reaming, a dedicated reamer is recommended.

HSS M2 refers to High-Speed Steel, a type of tool steel known for its hardness, wear resistance, and ability to maintain its cutting edge at high temperatures. M2 is a specific grade of HSS.

The double straight flutes are designed to efficiently clear chips and swarf away from the cutting area, preventing clogging and allowing for faster, smoother drilling with less risk of the bit binding.

Ensure you are using the correct drilling speed for the material. Apply steady, consistent pressure. Check if the material is too hard for the bit or if the bit is becoming dull.

Reduce drilling speed. Use a cutting lubricant or coolant. Ensure swarf is clearing properly from the flutes.

Reduce drilling pressure. Ensure swarf is clearing efficiently. Check for any deformities or obstructions in the hole being drilled.

Periodically retract the bit slightly during drilling to allow swarf to clear. Ensure you are using drilling speeds that promote efficient chip ejection.