Step drill bit Yato YT-44740

The Yato YT-44740 step drill bit set contains 12 stepped bits with a length of 105 mm designed for progressive hole enlargement and precise drilling in thin metals, plastics and laminated materials. Each bit features multiple cutting diameters along its length so a single tool can drill several hole sizes without changing bits. The set is intended to provide controlled chip removal and consistent hole quality for tasks that require clean, deburred openings and variable-diameter holes.

Advantages

The stepped geometry reduces the need for multiple drill size changes and helps maintain concentricity when enlarging holes. Durable cutting edges and a finish that resists corrosion extend tool life under regular workshop and site conditions. The single-piece stepped design improves stability during drilling and simplifies work on sheet material, panels and enclosures. The 105 mm length gives access to recessed areas while maintaining rigidity for accurate hole placement.

Suitable for

• Drilling and enlarging holes in sheet metal, aluminium and thin steel
• Creating cable and conduit entry holes in panels and junction boxes
• Working with plastics, laminates and composite panels
• Automotive bodywork, HVAC installations and electrical fitting tasks

Key specifications

• Number of pieces: 12 stepped bits
• Length: 105 mm per bit
• Design: multi-diameter stepped cutting profile
• Typical materials: suitable for thin metals, plastics and laminated materials
• Mount type: compatible with standard drill chucks

How to use

Mark the desired hole centre and secure the workpiece to prevent rotation. Select a step corresponding to the desired final diameter and install the bit in a drill with a suitable chuck. Start drilling at low to moderate speed, applying steady, even pressure to allow the bit to cut progressively through material. Use cutting lubricant when working with metals to improve surface finish and reduce heat build-up. Retract periodically to clear chips and avoid clogging between steps.

Usage recommendations

Use the step drill bit set at appropriate speeds for the material being drilled and keep the workpiece firmly clamped. For thicker or harder metals, drill a pilot hole first or use incremental steps rather than forcing the bit through in a single pass. Clean and lightly oil bits after use to prolong cutting life and maintain consistent hole quality.