Step drill bit Smart365 11-S10630 HSS, 6–30 mm

The Step drill bit Smart365 11-S10630 HSS is a single-piece stepped drill designed to create and enlarge holes with diameters from 6 to 30 mm in one tool. Made from high-speed steel (HSS), this bit is intended for use in sheet metal and other thin materials where multiple hole sizes are required without frequent tool changes. The stepped geometry provides a sequence of progressively larger cutting diameters so that one drilling operation can produce a range of hole sizes with consistent results.

Advantages

The stepped design reduces the need to switch between individual bits, saving time during installation and fabrication tasks. HSS construction offers good hardness and wear resistance for general-purpose metalworking, enabling reliable cutting in steel, aluminum and similar thin materials. The single-piece construction minimizes wobble and improves concentricity for more accurate holes. Its tapered steps help produce cleaner hole edges and smoother transitions between diameters.

Suitable for

• Drilling and enlarging holes in sheet metal
• Electrical panel and junction box installations
• HVAC and ductwork fitting tasks
• Light fabrication and metalworking where multiple hole sizes are needed
• Workshop use with hand drills and drill presses on thin materials

Key specifications

• Material: High-speed steel (HSS)
• Drilling diameter range: 6–30 mm
• Design: Single-piece stepped drill
• Application: Thin metals and sheet material
• Compatible with: Hand drills and drill presses

How to use

Secure the workpiece and mark the desired hole center. Mount the step drill bit in the drill chuck ensuring it is properly tightened and aligned. Begin drilling at low to moderate speed, applying steady pressure; the stepped profile will cut progressively larger diameters as the bit advances. For cleaner holes and reduced heat, use light cutting oil or lubricant on metal substrates and withdraw periodically to clear chips. Reduce speed when reaching larger steps to maintain control and accuracy.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and gloves, clamp the workpiece firmly, and avoid excessive feed rates. For thicker or hardened materials, consider pre-drilling a pilot hole or using purpose-built bits for those applications. Store the bit dry and protected to avoid corrosion and inspect cutting edges before use.